Rosemount 2120 Specifications

Rosemount™ 2120 Level Switch

Vibrating Fork

Product Data Sheet

December 2017

00813-0100-4030, Rev HC

 Designed for operation in process

temperatures of –40 to 302 °F (–40 to 150 °C)

 Electronic self-checking and condition

monitoring

 Increased safety, SIL2-certified to IEC 61508

as required by IEC 61511 and SIL3 capable

 Adjustable switching delay for turbulent or

splashing applications

 “Fast drip” fork design gives a quicker response

time, especially with viscous liquids

 General area, explosion-proof/flameproof, and

intrinsically safe options

 Hygienically certified to 3-A

and complies with FDA and ASME-BPE

and EHEDG,

Rosemount 2120 Level Switch

‘Fast drip’ forks

There is a variety of plug-in electronics options, with

each having an adjustable mode and switching delay

(see “Electrical connections” on page 12)

The Quick Release kit is a new optional set of accessories.

It makes inspection, proof-testing, and servicing easier than ever

(see Table 2 on page 9 for accessories)

Overview of the Rosemount 2120 Level Switch

Measurement principle

The Rosemount 2120 is designed using the principle of a tuning fork. A piezo-electric crystal oscillates the forks at their natural frequency. Changes to this frequency are continuously monitored. The frequency of the vibrating fork sensor changes depending on the medium in which it is immersed. The denser the liquid, the lower the frequency.

When used as a low level alarm, the liquid in the tank or pipe drains down past the fork, causing a change of natural frequency that is detected by the electronics and switches the output state.

When the Rosemount 2120 is used as a high level alarm, the liquid rises in the tank or pipe, making contact with the fork which then causes the output state to switch.

Key features and benefits

December 2017

 Function virtually unaffected by flow, bubbles, turbulence, foam,

vibration, solids content, coating products, liquid properties, and product variations

 The Rosemount 2120 is designed for operation in process

temperatures from –40 to 302 °F (–40 to 150 °C)

 A ‘heartbeat’ LED indicates its operating state. The LED also flashes

when the switch output is ‘off’ and is constantly lit when 'on'

 Adjustable switching delay prevents false switching in turbulent or

splashing applications

 ‘Fast drip’ fork design gives quicker response time, especially with

viscous liquids. Rapid wet-to-dry and dry-to-wet time setting for highly responsive switching

 Fork shape is optimized for polishing to meet hygienic

requirements. Mechanical- and electro-polishing options.

 Magnetic test point makes functional test easy

 No moving parts or crevices for virtually no maintenance

Overview of the Rosemount 2120 Level Switch . . page 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .page 10

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . page 4 Product Certifications . . . . . . . . . . . . . . . . . . . . .page 14

Spare Parts and Accessories . . . . . . . . . . . . . . . . . . . page 9 Dimensional Drawings . . . . . . . . . . . . . . . . . . . .page 16

2 Emerson.com/Rosemount

December 2017

High and low level alarm

High-temperature applications

Pump control / limit detection

Wireless applications using a

Rosemount 702 Discrete Transmitter

In tank gauging systems, a Rosemount 2120 high level alarm switch can be used as an alternative to a radar level gauge. See the Rosemount Tank Gauging Product Data

Sheet for additional information.

Point Level Alarm

Rosemount

2120

Rosemount

5900S

Level

High level alarm: two separate and configurable relay outputs

Fit and forget

 Once installed, the Rosemount 2120 is ready to go.

It needs no calibration and requires minimum installation

 The ‘heartbeat’ LED gives an instant visual indication that the unit is operational

 Functional testing of the instrument and system is easy with a magnetic test point

 You can install, and forget it

Superior performance

 The Rosemount 2120 is a popular choice for high and low level alarm and pump

control duties for its simplicity, ease of use, and reliability

 Functionality is virtually unaffected by flow, turbulence, bubbles, foam, or vibration

 The ‘fast drip’ design allows the liquid to be quickly drawn away from the fork tip

when mounted horizontally, making the Rosemount 2120 quicker and more responsive in high density or viscous liquid applications

Rosemount 2120 Level Switch

 With a user-selectable time delay feature, the risk of false switching is minimized in

turbulent or splashing applications

Applications

 Overfill protection

 High and low point level alarms

 Pump control or limit detection

 Run dry or pump protection

 Hygienic applications

 High-temperature applications

 Wireless applications

r a d

R k n

T t n

o m e s

o R

f f

M R E T

O i H

N I

A G

o L

USB

RS-232

Ext. pwr

0 8 1

2 M B

3Emerson.com/Rosemount

Rosemount 2120 Level Switch

December 2017

Ordering Information

Specification and selection of product materials, options, or components must be made by the purchaser of the equipment. See page 10 for more information on Material Selection.

Table 1. Rosemount 2120 Ordering Information

The starred options (★) 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

2120 Vibrating Fork Liquid Level Switch / –40…302 °F (–40...150 °C)

Materials of construction: process connection/fork

D 316/316L Stainless Steel (1.4401/1.4404) dual certified

(1)

C Alloy C (UNS N10002), Alloy C-276 (UNS N10276), Solid

ECTFE copolymer, coated 316/316L SST (1.4401/1.4404)

Process connection size / type

1A 1-in. BSPT (R) Thread

1B 1-in. BSPP (G) Thread

1D 1-in. NPT Thread

1P 1-in. BSPP (G), O-ring

5R 11/2-in. (38 mm) Tri Clamp

2R 2-in. (51 mm) Tri Clamp

1G 1-in. ASME B16.5 Class 150 Raised Face (RF) Flange

1H 1-in. ASME B16.5 Class 300 Raised Face (RF) Flange

1J 1-in. ASME B16.5 Class 600 Raised Face (RF) Flange

5G 11/2-in. ASME B16.5 Class 150 Raised Face (RF) Flange

5H 11/2-in. ASME B16.5 Class 300 Raised Face (RF) Flange

2G 2-in. ASME B16.5 Class 150 Raised Face (RF) Flange

2H 2-in. ASME B16.5 Class 300 Raised Face (RF) Flange

3G 3-in. ASME B16.5 Class 150 Raised Face (RF) Flange

3H 3-in. ASME B16.5 Class 300 Raised Face (RF) Flange

4G 4-in. ASME B16.5 Class 150 Raised Face (RF) Flange

4H 4-in. ASME B16.5 Class 300 Raised Face (RF) Flange

1K DN25, EN1092 PN 10/16 Flange

1L DN25, EN1092 PN 25/40 Flange

1M DN25, EN1092 PN 63 Flange

1N DN25, EN1092 PN 100 Flange

5K DN40, EN1092 PN 10/16 Flange

5L DN40, EN1092 PN 25/40 Flange

/4-in. BSPT (R) Thread

/4-in. BSPP (G) Thread

/4-in. NPT Thread

★

Emerson.com/Rosemount

December 2017

Rosemount 2120 Level Switch

Table 1. Rosemount 2120 Ordering Information

The starred options (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.

2K DN50, EN1092 PN 10/16 Flange

2L DN50, EN1092 PN 25/40 Flange

7K DN65, EN1092 PN 10/16 Flange

7L DN65, EN1092 PN 25/40 Flange

3K DN80, EN1092 PN 10/16 Flange

3L DN80, EN1092 PN 25/40 Flange

4K DN100, EN1092 PN 10/16 Flange

4L DN100, EN1092 PN 25/40 Flange

5J 11/2-in. ASME B16.5 Class 600 Raised Face (RF) Flange

2J 2-in. ASME B16.5 Class 600 Raised Face (RF) Flange

3J 3-in. ASME B16.5 Class 600 Raised Face (RF) Flange

4J 4-in. ASME B16.5 Class 600 Raised Face (RF) Flange

5M DN40, EN1092 PN 63 Flange

5N DN40, EN1092 PN 100 Flange

2M DN50, EN1092 PN 63 Flange

2N DN50, EN1092 PN 100 Flange

7M DN65, EN1092 PN 63 Flange

7N DN65, EN1092 PN 100 Flange

3M DN80, EN1092 PN 63 Flange

3N DN80, EN1092 PN 100 Flange

4M DN100, EN1092 PN 63 Flange

4N DN100, EN1092 PN 100 Flange

SA 25A, 10K, JIS B2220 Flange

SB 25A, 20K, JIS B2220 Flange

TA 40A, 10K, JIS B2220 Flange

TB 40A, 20K, JIS B2220 Flange

UA 50A, 10K, JIS B2220 Flange

UB 50A, 20K, JIS B2220 Flange

VA 80A, 10K, JIS B2220 Flange

VB 80A, 20K, JIS B2220 Flange

ZA 100A, 10K, JIS B2220 Flange

ZB 100A, 20K, JIS B2220 Flange

(2)

Customer Specific

★

Emerson.com/Rosemount

Rosemount 2120 Level Switch

December 2017

Table 1. Rosemount 2120 Ordering Information

The starred options (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.

Electronic type

Available certifications

T Direct load switching (Mains 2-wire) 20 to 264 Vac 50/60Hz, 20 to 60 Vdc NA, E1, E5, E6, E7, EM, G5, G6

G PNP/PLC (3-wire) 20 to 60 Vdc NA, E1, E5, E6, E7, EM, G5, G6

V Relay DPCO, 20 to 264 Vac 50/60Hz, 20 to 60 Vdc NA, E1, E5, E6, E7, EM, G5, G6

E Relay DPCO, 9...30 Vdc E5 and G5

K NAMUR All

H 8/16 mA All

Surface finish

Available

connections

Available housings

1 Standard surface finish All All

(3)

(4)

Product certifications

Hand polished (Ra < 0.4 μm) Tri Clamp only All

Ra < 0.76 μm, hygienically approved Tri Clamp only A, X

Electro-polished to  0.76 μm, hygienically approved Tri Clamp only A, X

Mechanically-polished to Ra < 0.1 μm, hygienically approved Tri Clamp only A, X

Electro-polished to Ra < 0.38 μm, hygienically approved Tri Clamp only A, X

Electronic

types allowed

(5)

No Hazardous Locations Certifications All except option E All

(6)

FM Ordinary Locations (unclassified, safe area) All Y, T

(7)

CSA Ordinary Locations (unclassified, safe area) All except option E Y, T

Available housings

E1 ATEX Flameproof All except option E X, S

(6)

(7)

FM Explosion-proof All Y, T

CSA Explosion-proof All except option E Y, T

E7 IECEx Explosion-proof All except option E X, S

EM Technical Regulation Customs Union (EAC), Flameproof All except option E X, S

I1 ATEX Intrinsic Safety K, H All

I5 FM Intrinsic Safety K, H All

I6 CSA Intrinsically Safe K, H All

I7 IECEx Intrinsic Safety K, H All

IM Technical Regulation Customs Union (EAC), Intrinsic. Safe K, H All

★

Housing

Available certifications

A Glass Filled Nylon, M20 conduits/cable threads NA, I1, I5, I6, and I7

D Glass Filled Nylon, 1/2-in. ANPT conduits/cable threads NA, I1, I5, I6, and I7

X Aluminum Alloy, M20 conduits/cable threads All except G5, G6, E5, E6

Y Aluminum Alloy, 3/4-in. ANPT conduits/cable threads All except E1, E7, and EM

S Stainless Steel, M20 conduits/cable threads All except G5, G6, E5, E6

T Stainless Steel 3/4-in. ANPT conduits/cable threads All except E1, E7, and EM

Emerson.com/Rosemount

★

December 2017

Rosemount 2120 Level Switch

Table 1. Rosemount 2120 Ordering Information

The starred options (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.

Fork length

Available connection

A Standard length 1.7 in. (44 mm) All except flanged options

(8)

(9)

Standard length flange 4.0 in. (102 mm) All flanged options

Extended, customer specified length in tenths of inches All except 1-in. BSPP O-ring (1P)

Extended, customer specified length in millimeters All except 1-in. BSPP O-ring (1P)

Specific extended fork length

0000 Factory default length (only if Fork Length A or H is selected)

(9)

XXXX

Specific customer specified length in tenths of inches or millimeters (XXX.X inches or XXXX mm)

Typical Model Number: 2120 D 0A K 1 I1 A 0000

Options (include with the selected model number)

Calibration data certification

Q4 Certificate of functional test

Material traceability certification

(8)(10)

Q8 Material traceability certification per EN 10204 3.1

Material certification

(8)(10)

Q15 NACE® MR0175 / ISO 15156

Q25 NACE MR0103

Safety certification

(11)

★

QS Prior-use certificate of FMEDA Data

(12)

Special procedures

Safety certificate to IEC61508

(13)

P1 Hydrostatic testing with certificate

Hygienic certifications

(14)

QA 3-A certificate

QE EHEDG certificate

ASME-BPE statement

(14)

QB ASME-BPE statement

Food Drug Administration statement

(14)

QH FDA statement

Surface finish certification

(14)

Q16 Surface finish certificate

Example of options included with the model number: 2120 D 0A K 1 I1 A 0000 Q8

1. ECTFE copolymer coating is only available for a flanged Rosemount 2120 but excludes 1-in./DN25/25A flanges. Flanges are dual certified 316 and 316L Stainless Steel (1.4401 and 1.4404).

★

Emerson.com/Rosemount

Rosemount 2120 Level Switch

2. Other process connections available upon request.

3. Hand-polished for hygienic connections to better than 0.4 μm Ra such that there are no pits, folds, crevices o r cracks discernible to the naked eye (i.e. no features larger than 75 micrometers based on resolving 1/60 degree at a distance of 250 mm).

4. Not available for explosion-proof or flameproof product certifications.

5. Includes the Technical Regulation Customs Union (EAC) ordinary location mark.

6. See “Product Certifications” on page 14. E5 includes G5 requirements. G5 is for use in unclassified, safe area locations only.

7. See “Product Certifications” on page 14. E6 includes G6 requirements. G6 is for use in unclassified, safe area locations only.

8. Not available for hand polished wet side.

9. Minimum length available for and for Tri Clamp, it is 4.1 in. (105 mm). Maximum length is 157.5 in. (4000 mm), except for ECTFE copolymer coating and polished process where the maximum length is 59.1 in. (1500 mm) and 39.4 in. (1000 mm) respectively. Examples: Code E1181 is 118.1 inches. Code M3000 is 3000 millimeters.

10. Only available for process-wetted parts.

11. Not available for Direct Load or Relay (option code E) switching electronics.

12. Not available with Relay (option code V) switching electronics.

13. Option limited to units with extended lengths up to 59.1-in. (1500 mm). Option is not available for ECTFE coating.

14. Available only for a Rosemount 2120 with a Tri Clamp fitting, Product Certification code NA, G*, or I*, and Surface Finish code 3, 4, 7, or 8.

/4-in. threaded connection is 3.8 in. (95 mm); for 1-in. threaded, it is 3.7 in. (94 mm); for flanged, it is 3.5 in. (89 mm);

December 2017

Safety Integrity Level (SIL) certification option

 The Rosemount 2120 has been independently certified to IEC 61508 as required by IEC 61511. Certification was conducted by

Exida. If required, add “QT” to the end of the model code. For example, 2120 D 0A K E1 X A0000 QT. (Note that you can have one or more OPTIONS codes at the end).

 Visit the Rosemount 2120 web page for additional information.

Overfill approval option

 The Rosemount 2120 has been TÜV-tested and approved for overfill protection according to the German DIBt/WHG regulations.

This option is not selectable in the ordering information table. If required, add “R2259” to the end of the model code. For example, 2120 D 0A K E1 X A0000 R2259. (Note that you can have one or more OPTIONS codes at the end).

Emerson.com/Rosemount

+ 16 hidden pages

Rosemount 2120 Specifications

Contents

Ordering Information