Product Data Sheet
00813-0100-2555, Rev AB
Rosemount™ 2555 Solids Level Switch
Capacitance Probe
January 2020
■
Very high sensitivity (dielectric constant, DK >= 1.5)
■
Supports high mechanical loads of up to 10 kN
■
Simple to install and set-up
■
Robust version for overpressure up to 363 psi (25 bar)
■
Temperature from -40 to 932 °F (-40 to 500 °C)
Rosemount 2555 January 2020
Introduction
Measurement principles
The Rosemount™ 2555 Solids Level Switch uses the principle of measuring capacitance through RF (Radio Frequency) to detect the
presence or absence of a solids medium and monitors the change in capacitance between the probe and the silo wall.
When the solids medium in the vessel (silo) falls away from the probe level, it causes an increase in capacitance that is detected by
the electronics and the output switches to indicate an 'uncovered' state.
When the solids medium in the vessel (silo) rises and covers the rod, it causes a decrease of capacitance that is detected by the
electronics and the output switches to indicate a 'covered' state.
The electrical output will vary depending on the electronics selected.
Key features and benefits
■
Flexible, robust solids switch - suitable for point level measurement of nearly all types of bulk materials
■
Reliable measurement of materials with low dielectric constants (DK from 1.5)
■
Designed for operation in high temperatures and pressures of up to 932 °F (500 °C) and 363 psi (25 bar)
■
Simple and quick automatic calibration for easy commissioning
■
Special probe design with high resistance to material build-up for safe maintenance-free operation
■
Continuous self-checking diagnostics for condition monitoring with easy-to-read display and push buttons
■
Approvals for hazardous locations (gas and dust)
■
Versatile installation options:
rod version: vertical, horizontal, and angled installation
—
— cable version: vertical installation
Note
A listing of dielectric (DK) values for solids materials can be in the Dielectric Values (DK Values) Data Sheet on-line document.
Contents
Introduction...................................................................................................................................................................................... 2
Ordering information........................................................................................................................................................................ 4
Spares and accessories...................................................................................................................................................................... 8
Specifications.................................................................................................................................................................................. 10
Product certifications...................................................................................................................................................................... 15
Dimensional drawings..................................................................................................................................................................... 19
2 Emerson.com/Rosemount
January 2020 Rosemount 2555
Applications
■
Level measurements of most bulk solids materials, including:
Flour, grains, sugar, cement, granulate, carbon black, and materials with coating properties
—
■
All types of vessel from small process silos to large storage silos
■
Extreme-temperature and high-pressure applications
■
Environments with heavy vibration
■
High-reliability and high-safety
■
Approvals for hazardous and explosive environments
Emerson.com/Rosemount 3
Rosemount 2555 January 2020
Ordering information
The specification and selection of product materials, options, or components must be made by the purchaser of the equipment.
See Materials selection for more information.
Table 1: Rosemount 2555 Ordering Information
The starred offerings (★) represent the most common options and should be selected for best delivery. The non-starred offerings
are subject to additional delivery lead time.
Model Product description
2555 Rosemount Solids Level Switch - Capacitance Probe ★
Probe thermal profile
S Standard 10-mm diameter probe (T
M Medium 22-mm diameter probe (T
E Extreme 22-mm diameter probe (T
R Standard 4-mm diameter rope (T
P Medium 8-mm diameter rope (T
V Extreme 8-mm diameter rope (T
process
process
process
= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★
process
= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★
process
= -40 to +932 °F (-40 to +500 °C), Pop -14.5 to 145 psi (-1 to +10 bar)) ★
process
= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★
= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★
= -40 to +932 °F (-40 to +500 °C), Pop -14.5 to 145 psi (-1 to +10 bar)) ★
Materials of construction: process connection/active probe and inactive extension rod Profiles
D 303/304/321 Stainless steel (1.4301/1.4305/1.4541) All ★
E 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating to active probe only S ★
F 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating to rope only R ★
G 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating S ★
S 316/316L Stainless steel (1.4404/1.4401) All ★
T 316/316L Stainless steel (1.4404/1.4401), PFA coating to active probe only S ★
U 316/316L Stainless steel (1.4404/1.4401), PFA coating to rope only R ★
V 316/316L Stainless steel (1.4404/1.4401), PFA coating S ★
Conduit entry / cable threads
1 M20 x 1.5, 1 off screwed cable gland + 1 off blind plug for CE, ATEX, and IECEx ★
2 M20 x 1.5, 2 off screwed cable glands ★
3 M20 x 1.5, 1 off screwed cable gland + 1 off blind plug for FM ★
4 NPT ½-in. tapered ANSI B1.20.1 (1 off conduit + 1 off Ex-d blind plug) ★
Process connection size Profiles
(1)
9
(1)
1
(1)
A
¾-in./19 mm (DN25)/25A S and R ★
1-in./25 mm (DN25)/25A S and R ★
1.25-in./32 mm All ★
5 1.5 in./(DN38)/40A All ★
(1)
2
(1)
3
(1)
4
2 in./50 mm (DN50)/50A All ★
3 in./80 mm (DN80)/80A All ★
4 in./100 mm (DN100)/100A All ★
4 Emerson.com/Rosemount
January 2020 Rosemount 2555
Table 1: Rosemount 2555 Ordering Information (continued)
(1)
B
(1)
C
Process connection rating Sizes
AA ASME B16.5 Class 150 flange 2, 3, and 4 ★
DZ EN 1092-1 PN6 flange 4 ★
DA EN 1092-1 PN16 flange 4 ★
M30 x 1.5 mm S and R ★
M32 x 1.5 mm S and R ★
NN For use with non-flange process connection type All except 3
and 4
Process connection type Ratings
F Flat-face flange DZ and DA ★
R Raised-face flange AA ★
G BSPP (G) thread NN ★
N NPT thread NN ★
M Metric thread NN ★
C Tri Clamp (ISO 2852) NN ★
Electronic type
V Relay DPDT 21 to 230 Vac/Vdc ★
Active probe length Profiles
(2)
A
(2)
B
(2)
C
Standard length 3.94-in. (100 mm) S, M, and E ★
Standard length 7.87-in. (200 mm) S, M, and E ★
Standard length 11.8-in. (300 mm) S, M, and E ★
E Extended, customer-specified length in tenths of inches All ★
M Extended, customer-specified length in millimeters All ★
Specific extended active probe length All
★
00000 Factory default length (only if active probe length A, B, or C is selected) ★
XXXXX Specific customer-specified length in tenths of inches (XXXX.X inches) or millimeters (XXXXX mm) ★
Inactive extension length
(3)
A
No inactive extension ★
E Inactive extension, customer-specified length in tenths of inches ★
M Inactive extension, customer-specified length in millimeters ★
Specific inactive extension length
0000 Factory default length (only if inactive extension length A is selected) ★
XXXX Specific customer-specified length in tenths of inches (XXX.X inches) or millimeters (XXXX mm) ★
Product certifications Conduit entry
NA No hazardous locations certifications 1, 2, and 4 ★
(4)
ND
ATEX, Dust Certification 1, 2, and 4 ★
Emerson.com/Rosemount 5
Rosemount 2555 January 2020
Table 1: Rosemount 2555 Ordering Information (continued)
(4)
NK
(4)
NL
(4)(5)
E5
(4)(5)
E7
(4)(5)
E8
EM
(4)(5)
K1
(4)(5)
K7
KM
(4)(5)
KY
KZ American and Canadian Ordinary Location (unclassified, safe area) 2, 3, and 4 ★
Options (include with selected model number)
Calibration data certification
Q4 Certificate of functional test ★
IECEx, Dust Certification 1, 2, and 4 ★
American, DIP 2, 3, and 4 ★
American, Flameproof/Dust certification 4
IECEx, Flameproof/Dust certification 4
ATEX, Flameproof/Dust certification 4
(4)(5)
Technical Regulations Customs Union (EAC), Dust Certification 1, 2, and 4
ATEX, Flameproof/Increased Safety/Dust Certification 1, 2, and 4
IECEx, Flameproof/Increased Safety/Dust Certification 1, 2, and 4
(4)(5)
Technical Regulations Customs Union (EAC), Flameproof/Increased Safety/Dust certification 1, 2, and 4
American, Flameproof/Dust certification 4
Weather protection
P2 Weather protection cover ★
Electronics sensitivity configuration
V1 Calibrate to 0.5 pF ★
V2 Calibrate to 1 pF ★
V3 Calibrate to 4 pF ★
V4 Calibrate to 10 pF ★
Active probe extension Profiles
R0 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm) long, ø10-mm probe S ★
R1 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm) long, ø10-mm probe, includes fixing hole S ★
R2 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm), ø22-mm probe M, E, P, V ★
R3 Flexible, 304/303 (1.4301/1.4305) stainless steel, 39.4 in. (1000 mm) long, ø10-mm probe S ★
R4 Flexible, 304/303 (1.4301/1.4305) stainless steel, 39.4 in. (1000 mm) long,
S ★
ø10-mm probe, includes fixing hole
R5 Rope, 304/303 (1.4301/1.4305) stainless steel, 78.7 in. (2000 mm) long,
S ★
ø10-mm probe and ø4-mm rope
R6 Rope, 304/303 (1.4301/1.4305) stainless steel, 78.7 in. (2000 mm) long,
S ★
ø10-mm probe, includes fixing hole and ø4-mm rope
R7 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,
S ★
ø10-mm probe and ø4-mm rope
R8 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,
S ★
ø10-mm probe, includes fixing hole and ø4-mm rope
6 Emerson.com/Rosemount
January 2020 Rosemount 2555
Table 1: Rosemount 2555 Ordering Information (continued)
R9 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,
M, E, P, V ★
ø22-mm probe, ø8-mm rope
Sliding sleeve
(6)
Profiles
S1 Sliding sleeve S, M, R, P ★
Extended product warranty
WR5 5-year limited warranty ★
Typical model number: 2555 S D 1 5 NN G V A 00000 A 0000 NA
(1)
This process connection size is not available when Materials of Construction codes G or V is selected.
(2)
This active probe length is not available when Materials of Construction codes F or U are selected.
(3)
The No Inactive Extension option is not available when Materials of Construction codes G or V is selected.
(4)
This product certification is available when Materials of Construction codes D or S are selected.
(5)
Contact your local Emerson representative for the availability of this option code.
(6)
The Sliding Sleeve option is not available when Materials of Construction codes G or V are selected.
Emerson.com/Rosemount 7
Rosemount 2555 January 2020
Spares and accessories
The specification and selection of product materials, options, or components must be made by the purchaser of the equipment.
See Materials selection for more information.
The starred offerings (★) represent the most common options and should be selected for best delivery. The non-starred offerings
are subject to additional delivery lead time.
Table 2: Spares
Part number Description
02500-1000-0106 Electronics board: Relay DPDT, universal voltage ★
02500-7000-0001 Extension: Rigid 316L SST (1.4404), 15.7 in. (400 mm) long, Ø10 mm probe ★
02500-7000-0002 Extension: Rigid 316L SST (1.4404), 15.7 in. (400 mm) long, Ø22 mm probe ★
02500-7000-0003 Extension: Flexible 304/303 SST (1.4301/14305), 39.4 in. (1000 mm) long, Ø10 mm probe ★
02500-7000-0004 Extension: Rope 304/303 SST (1.4301/14305), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø4 mm rope ★
02500-7000-0005 Extension: Rope 316L SST (1.4404), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø4 mm rope ★
02500-7000-0006 Extension: Rope 316L SST (1.4404), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø8 mm rope ★
02500-1000-0109 Standard Ø4 mm rope, 316 SST (1.4401), not coated, price per 39.4 in, (1000 mm) ★
02500-1000-0110 Standard Ø4 mm rope, 316 SST (1.4401), coated, price per 39.4 in, (1000 mm) ★
02500-1000-0111 Weight Ø22 mm for 4 mm rope, 304/303 SST (1.4301/14305), including fixings ★
02500-1000-0112 Weight Ø22 mm for 4 mm rope, 316L SST (1.4404), including fixings ★
02500-1000-0113 Rope holder Ø22 mm for 4 mm rope, 304/303 SST (1.4301/14305), including fixings ★
02500-1000-0114 Rope holder Ø22 mm for 4 mm rope, 316L SST (1.4404), including fixings ★
02500-1000-0115 Medium Ø8 mm rope, 316 SST (1.4401), not coated, price per 39.4 in, (1000 mm) ★
02500-1000-0116 Weight Ø35 mm for 8 mm rope, 304/303 SST (1.4301/14305), including fixings ★
02500-1000-0117 Weight Ø35 mm for 8 mm rope, 316L SST (1.4404), including fixings ★
02500-1000-0118 Rope holder Ø22 mm for 8 mm rope, 304/303 SST (1.4301/14305), including fixings ★
02500-1000-0119 Rope holder Ø22 mm for 8 mm rope, 316L SST (1.4404), including fixings ★
02500-1000-0056 1 off M32 x 1½ mm hexagon nut (kit), 303 SST (1.4305), ★
02500-1000-0121 1 off ¾-in. BSPP hexagon nut (kit), 303 SST (1.4305) ★
02500-1000-0058 1 off 1-in. BSPP hexagon nut (kit), 303 SST (1.4305) ★
02500-1000-0060 1 off M30 x 1½ mm hexagon nut (kit), 303 SST (1.4305) ★
02500-1000-0063 1 off 1½ in. BSPP hexagon nut (kit), 303 SST (1.4305) ★
02500-1000-0064 1 off 1¼ in. BSPP hexagon nut (kit), 303 SST (1.4305) ★
02500-1000-0126 Weather protection for housing ★
8 Emerson.com/Rosemount
January 2020 Rosemount 2555
Table 3: Accessories
Part number Description
02500-7500-0003 Mounting kit 1 for DN100 PN6 and EN1092-1 flange with ø18 mm holes, containing:
4 off M16 x 60 mm screws (304-grade stainless steel)
4 off M16 nuts
4 off washers
1 off seal (non-food grade) for up to 464 °F (240 °C)
02500-7500-0006 Mounting kit 2 for DN100 PN6 and EN1092-1 flange with M16 threaded holes, containing:
4 off M16 x 40 mm screws (A2-grade stainless steel)
4 off M16 washers (A2-grade stainless steel)
1 off seal (non-food grade) for up to 464 °F (240 °C)
02500-7500-0009 Mounting kit 3 for DN100 PN16 and EN1092-1 flange with ø18 mm holes, containing:
8 off M16 x 60 mm screws (A2-grade stainless steel)
8 off M16 nuts (A2-grade stainless steel)
8 off M16 washers (A2-grade stainless steel)
1 off seal (non-food grade) for up to 464 °F (240 °C)
02500-7500-0012 Mounting kit 4 for DN100 PN16 and EN1092-1 flange with M16 threaded holes, containing:
8 off M16 x 40 mm screws (A2-grade stainless steel)
8 off M16 washers (A2-grade stainless steel)
1 off seal (non-food grade) for up to 464 °F (240 °C)
02500-7501-0001 Flat sealing gasket for 1-in. threaded process connection
Maximum operating temperature of 464 °F (240 °C)
★
★
★
★
★
Emerson.com/Rosemount 9
Rosemount 2555 January 2020
Specifications
Electrical data
Connection terminals
Cable entry
Signal output delay
Safety operation (FSL or FSH)
Operation frequency
Overvoltage category
Pollution degree
Electronics
Power supply
Maximum ripple of power
supply
Maximum installed load
Signal output
Display
Status indication
Data storage
Isolation
Protection class
0.14 - 2.5 mm2 (AWG 26-14)
M20 × 1.5 screwed cable gland
½-in. NPT conduit connection
Clamping range (diameter) of the factory provided cable glands:
0.24 to 0.47-in. (6 to 12 mm) for M20 × 1.5
Configurable from 0.5 to 60 seconds.
Configurable switches for each signal output. Select Fail Safe High (FSH) or Fail Safe Low (FSL)
depending on application.
100 kHz
II
2 (inside housing)
Universal voltage Relay DPDT
21 to 230 Vac (50/60 Hz) or Vdc ±10%
*
includes ±10% from EN 61010
7 Vss for dc supply
1.5 VA or 1.5 W
Floating relay DPDT
Maximum 250 Vac, 8 A (non-inductive)
Maximum 30 Vdc, 5 A (non-inductive)
Four digit LCD
Displays actual measured capacitance, signal output state, and self diagnostics
Lowest operating temperature: -22 °F (-30 °C)
Tri-color built-in LED (according to NE44): Power on, signal output, failure/maintenance
Non-volatile EPROM for configuration settings and calibration data.
Power supply to signal output: 2225 Vrms
Signal output to signal output: 2225 Vrms
I
*
10 Emerson.com/Rosemount
January 2020 Rosemount 2555
Mechanical data
Housing
Ingress protection
Process connection/probes
Maximum noise level
Overall weight
(approximated)
Aluminum housing, powder coated
Seal between housing and lid: NBR
Seal between housing and process connection: NBR
Nameplate: polyester film
IP67 (EN 60529), NEMA® Type 4X
Rosemount 2555S and 2555R
Materials:
Stainless steel 303/304 (1.4301/1.4305) or 316/316L (1.4401/1.4404) for rope
Reinforced-PPS probe isolation
FKM or FFKM probe gaskets
PFA coating of probe/rope (optional)
Thread: G (¾-in., 1-in., 1¼-in., or 1½-in.) DIN 228; M30 x 1.5, M32 x 1.5; NPT (¾-in. 1-in., 1¼-in.,
or 1½-in.) tapered ANSI B 1.20.1
Tri Clamp: 1-in. (DN25), 1½-in. (DN40), or 2-in. (DN50) ISO 2852
Rosemount 2555M and 2555P
Materials:
Stainless steel 303/304 (1.4301/1.4305) or 316/316L (1.4401/1.4404) for rope
Reinforced-PPS probe isolation
FKM or FFKM probe gaskets
Thread: G (1¼-in. or 1½-in.) DIN 228; NPT (1¼-in. or 1½-in.) tapered ANSI B 1.20.1
Rosemount 2555E and 2555V
Materials:
Stainless steel 303/304 (1.4301/1.4305) or 316/316L (1.4401/1.4404) for rope
Ceramic probe isolation
Graphite probe gaskets
Thread: G (1¼-in. or 1½-in.) DIN 228; NPT (1¼-in. or 1½-in.) tapered ANSI B 1.20.1
Other:
Flanges according to selection, stainless steel 321 (1.4541) or 316L (1.4404)
All materials are food grade.
40 dBA
See Table 4.
Table 4: Overall Weight (Approximated)
Total weight = Basic weight + active probe length L1 + inactive length L2.
All weights with 1¼-in. NPT process connection and without flanges.
Standard housing
(1)
Active probe length:
(2)
L1
1.37 lbs per 39.3 in.
(+0.62 kg per m)
Inactive length:
(2)
L2
2.65 lbs per 39.3 in.
(+1.2 kg per m)
Rosemount 2555S
rod version
Basic weight
3.7 lbs
(1.7 kg)
Emerson.com/Rosemount 11
-40 °F
(-40 °C)
-40 °F
(-40 °C)
104 °F
(40 °C)
158 °F
(70 °C)
158° F
(70 °C)
464 °F
(240 °C)
Tamb
Tp
932/833 °F
(500/445 °C)
Rosemount 2555 January 2020
Table 4: Overall Weight (Approximated) (continued)
Standard housing
Basic weight
(1)
Active probe length:
(2)
L1
Inactive length:
(2)
L2
Rosemount 2555R
rope version
Rosemount 2555M
rod version
Rosemount 2555P
rope version
Rosemount 2555E
rod version
Rosemount 2555V
rope version
(1)
Rod version with shortest length L1=3.9 in. (100 mm), and rope version without rope.
(2)
See Dimensional drawings.
5.1 lbs
(2.3 kg)
6.2 lbs
(2.8 kg)
8.8 lbs
(4.0 kg)
8.0 lbs
(3.6 kg)
11 lbs
(4.8 kg)
Operating conditions
Ambient
temperature
(housing)
Process
temperature
-40 to +158 °F (-40 to +70 °C)
Rosemount 2555S,
2555R, 2555M and
2555P:
Rosemount 2555E or
2555V:
-40 to +464 °F (-40 to +240 °C)
-40 to +932 °F (-40 to +500 °C); versions with Ex-approvals: +833 °F (+445 °C)
0.13 lbs per 39.3 in.
(+0.06 kg per m)
6.61 lbs per 39.3 in.
(+3.0 kg per m)
0.57 lbs per 39.3 in.
(+0.26 kg per m)
6.61 lbs per 39.3 in.
(+3.0 kg per m)
0.57 lbs per 39.3 in.
(+0.26 kg per m)
2.65 lbs per 39.3 in.
(+1.2 kg per m)
7.19 lbs per 39.3 in.
(+3.26 kg per m)
7.19 lbs per 39.3 in.
(+3.26 kg per m)
7.19 lbs per 39.3 in.
(+3.26 kg per m)
7.19 lbs per 39.3 in.
(+3.26 kg per m)
Ventilation
Maximum range
and sensitivity
Spark protection
12 Emerson.com/Rosemount
Ventilation is not required.
3 to 100 pF, 0.5 pF
3 to 400 pF, 2 pF
Robust built-in protection against static-electricity discharge from the bulk materials.
For versions with Ex-approvals: see also Product Certifications.
A
B
217psi
(15 bar)
363psi
(25 bar)
248 °F
(120 °C)
464 °F
(240 °C)
P
Tp
932 °F
(500 °C)
-14.5 psi
(-1 bar)
-40 °F
(-40 °C)
14.5 psi
(1 bar)
January 2020 Rosemount 2555
Bulk material
restrictions
Maximum
mechanical load
Maximum process
pressure
Dielectric constants (DK values) > 1.5
Note
All ratings are for 104 °F (40 °C).
Rosemount 2555S
Rosemount 2555R
Rosemount 2555M
Rosemount 2555P
Rosemount 2555E
Rosemount 2555V
Rod version:
Rope version:
Rod version:
Rope version:
Rod version:
Rope version:
A: 125 Nm
4 kN tensile load
A: 525 Nm
40 kN tensile load
A: 525 Nm
10 kN tensile load
B: 20 Nm
B: 90 Nm
B: 20 Nm
The maximum process pressure may be reduced when flanges are used. Refer to the flange standards for
pressure ratings and pressure de-ratings with higher temperatures.
For versions with Ex-approvals: see also Product Certifications.
Vibration
Relative Humidity
Maximum altitude
Expected product
lifetime
Emerson.com/Rosemount 13
1.5 (m/s2)2/ Hz according to EN 60068-2-64
0 to 100%, suitable for outdoor use
6562 ft. (2000 m)
The following parameters have a negative influence on the expected product lifetime:
High ambient- and process temperatures, corrosive environments, high plant vibrations, and high flow rate
of abrasive bulk.
Rosemount 2555 January 2020
Transport and storage
Transport
Storage
Refer to the instructions as stated on the transport packaging, otherwise the products may get
damaged.
Transport temperature: -40 to +176 °F (-40 to +80 °C)
Transport humidity: 20 to 85%
Always inspect the received goods for any damage occurred during shipment from the factory. Notify
Emerson of damaged goods as soon as possible.
Products must be stored at a dry and clean place. They must be protected from influence of corrosive
environments, vibrations, and exposure to direct sunlight.
Storage temperature: -40 to +176 °F (-40 to +80 °C)
Storage humidity: 20 to 85%
14 Emerson.com/Rosemount
January 2020 Rosemount 2555
Product certifications
European Union directive information
A copy of the EU Declaration of Conformity can be found at the end of the Rosemount 2555 Product Certifications document. The
most recent revision of the EU Declaration of Conformity can be found at Emerson.com/Rosemount.
Ordinary location certification
As standard, the level switch has been examined and tested to determine that the design meets the basic electrical, mechanical,
and fire protection requirements by a nationally recognized test laboratory (NRTL) as accredited by the Federal Occupational Safety
and Health Administration (OSHA).
Installing equipment in North America
The US National Electrical Code® (NEC) and the Canadian Electrical Code (CEC) permit the use of Division marked equipment in
Zones and Zone marked equipment in Divisions. The markings must be suitable for the area classification, gas, and temperature
class. This information is clearly defined in the respective codes.
U.S.A.
U.S.A. Dust certification
NL
Summary of product certification
Protection
Project ID
Standards
Markings
Dust-ignition proof
3053298
FM Class 3600:2011
FM Class 3616:2011
FM Class 3810:2005
ANSI/ISA 61010:2012
ANSI/ISA 60079-0:2013
ANSI/ISA 60079-11:2013
ANSI/NEMA® 250:1991
ANSI/IEC 60529:2004
DIP-IS Class II,III Division 1 Groups E, F, G T4A
T
= -40 °C to +70 °C
(amb)
Enclosure IP67, Type 4 or Type 4X
Emerson.com/Rosemount 15
Rosemount 2555 January 2020
U.S.A. Ordinary Location certification
KZ
Summary of product certification:
Protection
Project ID
Standards
Markings
Ordinary location (unclassified, safe area)
3053298
FM Class 3810:2005
ANSI/ISA 61010:2012
ANSI/ISA 60079-11:2013
ANSI/NEMA® 250:1991
ANSI/IEC 60529:2004
Type 4/4X, IP67
Canada
Canada Ordinary Location certification
KZ
Summary of product certification
Protection
Project ID
Standards
Markings
Europe
ATEX Dust certification
ND
Summary of product certification
Protection
Certificate
Standards
Markings
Temperature
Ordinary location (unclassified, safe area)
3053298
CSA-C22.2 No. 94:R2011
CSA-C22.2 No. 60529:R2010
CSA-C22.2 No. 61010-1:2012
Type 4/4X, IP67
By enclosure
BVS 19 ATEX E 073
EN60079-0:2012/A11:2013
EN 60079-11:2012
EN 60079-31:2014
II 1/2 D Ex ia/tb IIIC T* Da/Db
See Table 5
16 Emerson.com/Rosemount
January 2020 Rosemount 2555
Table 5: Thermal data
Maximum ambient temperature Maximum process temperature Maximum surface temperature
70 °C <= 80 °C 120 °C
<= 120 °C
<= 240 °C
<= 445 °C
(1)
Maximum surface temperature is identical to the maximum process temperature.
(2)
Available only when Probe Thermal Profile code E is selected.
(2) (1)
Permitted ambient temperature at the electronics enclosure:
■
-40 °C <= T
<= +70 °C
Amb
The maximum surface temperature is limited to 120 °C by a thermal fuse.
Permitted temperature at sensor extension, process connection:
■
-40 to 240 °C (when Probe Thermal Profile code S, M, R or P is selected.)
■
-40 to 445 °C (when Probe Thermal Profile code E or V is selected.)
(1)
(1)
International
IECEx Dust certification
NK
Summary of product certification
Protection
Certificate
Standards
Markings
Temperature
Table 6: Thermal data
Maximum ambient temperature Maximum process temperature Maximum surface temperature
70 °C <= 80 °C 120 °C
<= 120 °C
<= 240 °C
<= 445 °C
By enclosure
IECEx BVS 19.0069
IEC 60079-0:2011
EN 60079-11:2011
IEC 60079-31:2013
IEC Ex ia/tb IIIC T* Da/Db
See Table 6
(1)
(1)
(2) (1)
(1)
Maximum surface temperature is identical to the maximum process temperature.
(2)
Available only when Probe Thermal Profile code E is in the model number.
The maximum surface temperature is limited to 120 °C by a thermal fuse.
Permitted temperature at sensor extension, process connection:
Emerson.com/Rosemount 17
Rosemount 2555 January 2020
■
-40 to 240 °C (when Probe Thermal Profile code S, M, R or P is selected.)
■
-40 to 445 °C (when Probe Thermal Profile code E or V is selected.)
18 Emerson.com/Rosemount
3.23 (82) 3.23 (82) 3.94 (100)
2.76
(70)
3.94
(100)
L
3.94
(100)
L
L2
2.76
(70)
H
C C D
Ø0.87
(Ø22)
3.15
(80)
L1
Ø0.39
(Ø10)
0.79
(20)
0.79
(20)
G
A
B
E
F
L1
Ø0.39
(Ø10)
3.15
(80)
3.94
(100)
L+0.28
(L+7)
January 2020 Rosemount 2555
Dimensional drawings
Figure 1: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code S)
A. Rod version, inactive extension
B. Rod version, shortest length
G¾-in. or ¾-in. NPT threaded process connection
C.
D. G1½-in., G1¼-in., G1-in., M32x1.5, M30x1.5, 1½-in. NPT, 1¼-in. NPT, 1-in. NPT threaded process connection
E. 1-in. or 2-in. Tri Clamp process connection
F. Flanged process connections - various sizes
G. Active shield
H. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters).
See Table 7 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 19
Rosemount 2555 January 2020
Table 7: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code S
L1: Active probe
(standard length)
3.94 in. (100 mm) 1.97 in. (50 mm) 78.74 in. (2000 mm) 1.97 in. (50 mm) 94.49 in. (2400 mm) - L1
7.87 in. (200 mm)
11.81 in. (300 mm)
Note
Length L = L1 + L2 + 3.94-in. (100 mm)
Minimum L length is 5.91-in. (150 mm)
Maximum L length is 98.4-in. (2500 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
20 Emerson.com/Rosemount
3.23 (82)
2.76
(70)
3.94
(100)
0.79
(20)
0.79
(20)
L
L2
3.15
(80)
L1
G
A
Ø0.87
(Ø22)
Ø0.87
(Ø22)
Ø0.16
(Ø4)
3.94 (100)
H
D
E
F
3.94
(100)
L+0.28
(L+7)
Ø0.87
(Ø22)
Ø0.87
(Ø22)
Ø0.16
(Ø4)
B
3.23 (82)
2.76
(70)
3.94
(100)
L
L1
3.15
(80)
G
C C
January 2020 Rosemount 2555
Figure 2: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code R)
A. Rope version, inactive extension
B. Rope version, shortest length
G¾-in. or ¾-in. NPT threaded process connection
C.
D. G1½-in., G1¼-in., G1-in., M32x1.5, M30x1.5, 1½-in. NPT, 1¼-in. NPT, 1-in. NPT threaded process connection
E. 1-in. or 2-in. Tri Clamp process connection
F. Flanged process connections - various sizes
G. Active shield
H. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters). See Table 8 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 21
Rosemount 2555 January 2020
Table 8: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code R
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
13.77 in. (350 mm) 787.4 in. (20000 mm) 1.97 in. (50 mm) 74.8 in. (1900 mm)
Note
Length L = L1 + L2 + 3.94-in. (100 mm)
Minimum L length is 17.7-in. (450 mm)
Maximum L length is 866.1-in. (22000 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
22 Emerson.com/Rosemount
3.23 (82)
2.76
(70)
2.76
(70)
3.23 (82)
3.94 (100)
F
5.91
(150)
5.91
(150)
0.98
(25)
C
C
3.15
(80)
0.98
(25)
L2
Ø1.3
(Ø33)
Ø1.3
(Ø33)
Ø1.5
(Ø38)
3.74
(95)
3.15
(80)
L
L
L1
E
E
L1
A
B
5.91
(150)
L
D
Ø1.5
(Ø38)
Ø0.87
(Ø22)
Ø0.87
(Ø22)
3.74
(95)
January 2020 Rosemount 2555
Figure 3: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code M)
A. Rod version, inactive extension
B. Rod version, shortest length
G1½-in., G1¼-in.,1½-in. NPT or 1¼-in. NPT threaded process connection
C.
D. Flanged process connections - various sizes
E. Active shield
F. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters). See Table 9 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 23
Rosemount 2555 January 2020
Table 9: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code M
L1: Active probe
(standard length)
3.94 in. (100 mm) 3.94 in. (100 mm) 78.74 in. (2000 mm) 3.94 in. (100 mm) 90.55 in. (2300 mm) - L1
7.87 in. (200 mm)
11.81 in. (300 mm)
Note
Length L = L1 + L2 + 7.87-in. (200 mm)
Minimum L length is 11.81-in. (300 mm)
Maximum L length is 98.4-in. (2500 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
24 Emerson.com/Rosemount
2.76
(70)
3.23 (82)
3.94 (100)
E
3.23 (82)
5.91
(150)
0.98
(25)
L2
Ø1.3
(Ø33)
Ø1.5
(Ø38)
3.74
(95)
L
3.15
(80)
L1
Ø0.31
(Ø8)
C
A
B
C
3.15
(80)
2.76
(70)
0.98
(25)
5.91
(150)
3.7
(94)
Ø1.5
(Ø38)
L
L1
Ø0.31
(Ø8)
5.91
(150)
L
D
Ø1.18
(Ø30)
Ø1.18
(Ø30)
January 2020 Rosemount 2555
Figure 4: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code P)
A. Rope version, inactive extension
B. Rope version, shortest length
C.
G1½-in., G1¼-in.,1½-in. NPT or 1¼-in. NPT threaded process connection
D. Flanged process connections - various sizes
E. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters). See Table 10 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 25
Rosemount 2555 January 2020
Table 10: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code P
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
13.78 in. (350 mm) 787.4 in. (20000 mm) 3.94 in. (100 mm) 70.87 in. (1800 mm)
Note
Length L = L1 + L2 + 7.87-in. (200 mm)
Minimum L length is 21.65-in. (550 mm)
Maximum L length is 866.1-in. (22000 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
Maximum process temperature for Ex-approved versions is limited to 445 °C.
26 Emerson.com/Rosemount
2.17
(55)
2.76
(70)
3.23 (82)
11.81
(300)
Ø1.31
(Ø33.4)
C
0.98
(25)
L2
Ø1.3
(Ø33)
2.17
(55)
E
5.51
(140)
L1
L
Ø0.87
(Ø22)
A
B
Ø1.5
(Ø38)
3.94 (100)
3.23 (82)
Ø1.31
(Ø33.4)
0.98
(25)
2.76
(70)
11.81
(300)
L
5.51
(140)
L1
Ø0.87
(Ø22)
E
11.81
(300)
L
D
C
F
Ø1.5
(Ø38)
January 2020 Rosemount 2555
Figure 5: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code E)
A. Rod version, inactive extension
B. Rod version, shortest length
C.
G1½-in., G1¼-in.,1½-in. NPT or 1¼-in. NPT threaded process connection
D. Flanged process connections - various sizes
E. Active shield
F. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters). See Table 11 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 27
Rosemount 2555 January 2020
Table 11: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code E
L1: Active probe
(standard length)
3.94 in. (100 mm) 3.94 in. (100 mm) 39.7 in. (1000 mm) 3.94 in. (100 mm) 90.55 in. (2300 mm) - L1
7.87 in. (200 mm)
11.81 in. (300 mm)
Note
Length L = L1 + L2 + 8.66-in. (220 mm)
Minimum L length is 12.6-in. (320 mm)
Maximum L length is 99.2-in. (2520 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
Maximum process temperature for Ex-approved versions is limited to 445 °C.
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
28 Emerson.com/Rosemount
2.76
(70)
3.23 (82)
3.23 (82)
11.81
(300)
0.98
(25)
Ø1.31
(Ø33.4)
Ø1.3
(Ø33)
L2
2.17
(55)
Ø1.5
(Ø38)
E
5.51
(140)
L
L1
Ø0.31
(Ø8)
Ø1.18
(Ø30)
A
B
D
11.81
(300)
L
F
3.94 (100)
2.76
(70)
11.81
(300)
0.98
(25)
Ø1.31
(Ø33.4)
Ø1.18
(Ø30)
Ø0.31
(Ø8)
E
5.51
(140)
L1
L
2.17
(55)
Ø1.5
(Ø38)
C
C
January 2020 Rosemount 2555
Figure 6: Rosemount 2555 Capacitance Probe Level Switch (Thermal Profile code V)
A. Rope version, inactive extension
B. Rope version, shortest length
C.
G1½-in., G1¼-in.,1½-in. NPT or 1¼-in. NPT threaded process connection
D. Flanged process connections - various sizes
E. Aluminum housing with M20 or ½-in. conduit/cable entries
Dimensions are in inches (millimeters). See Table 12 for L, L1, and L2 dimensions.
Emerson.com/Rosemount 29
X
Rosemount 2555 January 2020
Table 12: Dimensions L1 and L2 for Rosemount 2555 with Thermal Profile code V
L1: Active probe (customer length) L2: Inactive extension length
Minimum Maximum Minimum Maximum
13.78 in. (350 mm) 787.4 in. (20000 mm) 3.94 in. (100 mm) 70.87 in. (1800 mm)
Note
Length L = L1 + L2 + 8.66-in. (220 mm)
Minimum L length is 22.4-in. (570 mm)
Maximum L length is 886.9-in. (22020 mm)
Inactive extension: the active probe shall have at least 1.97 in. (50 mm) distance to the silo wall.
Maximum process temperature for Ex-approved versions is limited to 445 °C.
Selecting active probe length
The correct selection of an active probe length (L1) is necessary to get a satisfactory change of capacitance between an uncovered
and covered probe (see recommendations in Table 13). If these recommendations are observed, the standard sensitivity of 2 pF can
be achieved in most cases.
Figure 7: Level Switch Switchpoint
Table 13: Active Probe Length Recommendations
DK Length L1 (horizontal mounting)
(1)
Switchpoint X
(2)
<1.5 n.a. n.a.
≥1.6 ≥11.8 in. (300 mm) ≤11.8 in. (300 mm)
≥1.8 ≥7.9 in. (200 mm) ≤7.9 in. (200 mm)
≥2.2 ≥3.9 in. (100 mm) ≤3.9 in. (100 mm)
≥10 ≥2.0 in. (50 mm) ≤2.0 in. (50 mm)
(1)
With stated L1 the unit works with factory set sensitivity (2 pF).
(2)
The table states the switchpoint with factory set sensitivity (2 pF).
30 Emerson.com/Rosemount
January 2020 Rosemount 2555
Emerson.com/Rosemount 31
00813-0100-2555
Rev. AB
January 2020
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Emerson Automation Solutions
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