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GE
Measurement & Control
RHM 12
Standard 1 inch Coriolis
Mass Flowmeter
The RHM 12 can measure ow rates up to 100 kg/
min (220 lb/min) with temperatures in excess of
350°C and pressures up to 331 bar. This model is
truly a versatile solution, manufactured by GE’s
Rheonik mass owmeter experts.
Applications
• General control • Dosing •Mixing
• Batching • Injections • Filling
Features
• Flow uncertainty down to 0.12%
• Density uncertainty down to 0.5%
• Repeatability better than 0.05%
• Unique torsion oscillator
• Typical measuring ranges from 1 to 100 kg/min
• Minimal ows as low as 0.75 kg/min
• Optimized solutions for batching operation
• Customization possible
• Extra compact design with minimal space
requirement
• Hazardous Area Approvals (ATEX, CSA, ...)
Advantages
• Torsion oscillator design assures most stable and
basically drift free measurement and increased
signal to noise ratio
• Not sensitive to changes in pressure
• Longest life time and increased safety - low stress
in welds and increased wall thickness against
abrasion
• No moving parts, practically no maintenance
• Removable connection manifold available
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General Dimensions RHM 12
PM0/SM0 (parallel/serial manifold construction)
Type removable manifold with PTFE seals and thread connection
Process Connection Face to face length (L) Order Code
mm in
Standard Female Thread G 3/4" 120 4.72 G1
Female Thread 3/4" NPT 120 4.72 N1
Type removable manifold with PTFE seals and ange connection
Process Connection Face to face length (L) Order Code
mm in
Standard Flange DIN DN25/PN40 400 15.75 D1
Flange DIN DN25/PN100 400 15.75 D2
Flange ANSI 1" 150# RF/SF 400 15.75 A1
Flange ANSI 1" 300# RF/SF 400 15.75 A2
Flange ANSI 1'' 600# RF/SF 400 15.75 A3
Flange ANSI 1" 1500# RF/SF 450 17.72 A6
Flange ANSI 1" 1500# RTJ 450 17.72 R1
Optional Flange DIN DN25/PN160 400 15.75 D4
Flange JIS RF 10k 25A (1") 400 15.75 J1
Flange JIS RF 20k 25A (1") 400 15.75 J2
A1 = 285 mm (11.22 in) B1 = 50 mm (1.97 in) Terminal box (without cable gland) 125 x 80 x 58 mm (4.92 x 3.15 x 2.28 in)
A2 = 300 mm (11.81 in) B2 = 70 mm (2.76 in) W = 0 mm for Temperature Range T1 and TA
H1 = 454 mm (17.87 in) W = 150 mm (5.91 in) for Temperature Range T2
H2 = 481 mm (18.94 in)
For weights and packaging dimensions please see last page of this section.
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General Dimensions RHM 12
PF0 (parallel, sealless construction with ange connection)
Type parallel, welded measuring loops without seals and ange connection
Process Connection Face to face length (L) Order Code
mm in
Standard Flange DIN DN25/PN40 400 15.75 D1
Flange DIN DN25/PN100 400 15.75 D2
Flange ANSI 1" 150# RF/SF 400 15.75 A1
Flange ANSI 1" 300# RF/SF 400 15.75 A2
Flange ANSI 1'' 600# RF/SF 400 15.75 A3
Flange ANSI 1" 1500# RF/SF 400 15.75 A6
Flange ANSI 1" 1500# RTJ 400 15.75 R1
Optional Flange DIN DN25/PN160 400 15.75 D4
Flange ANSI 1" 600# RTJ 400 15.75 R3
Flange ANSI 1" 2500# RTJ 400 15.75 R2
Grayloc Hub 1 1/2" GR11 400 15.75 H3
Flange JIS RF 10k 25A (1") 400 15.75 J1
Flange JIS RF 20k 25A (1") 400 15.75 J2
PFT (parallel, sealless construction with thread connection)
Type parallel, welded measuring loops without seals and thread connection
Process Connection Face to face length (L) Order Code
mm in
Standard Female Thread G 3/4" 400 15.75 G1
Female Thread 3/4" NPT 400 15.75 N1
Swagelok ¾" Tube inlet (SS1210-1-12W)
470 18.50 W1
A1 = 285 mm (11.22 in) B1 = 50 mm (1.97 in) Terminal box (without cable gland) 125 x 80 x 58 mm (4.92 x 3.15 x 2.28 in)
A2 = 300 mm (11.81 in) B2 = 70 mm (2.76 in) W = 0 mm for Temperature Range T1 and TA
H1 = 454 mm (17.87 in) W = 150 mm (5.91 in) for Temperature Range T2, T3 and T4
H2 = 540 mm (21.26 in)
For weights and packaging dimensions please see last page of this section.
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General Dimensions RHM 12
SF0 (serial, sealless construction without dead spaces) (*)
Type single path, welded measuring loops without seals and sanitary connection
Process Connection Face to face length (L) Order Code
mm in
Standard Sanitary 1" Triclamp,
DIN 32676
Sanitary NW20, DIN 11851 350 13.78 S4
Process Connection Face to face length (L) Order Code
Standard Flange DIN DN25/PN40 400 15.75 D1
Flange ANSI 1" 150# RF/SF 400 15.75 A1
Flange ANSI 1" 300# RF/SF 400 15.75 A2
Optional Flange DIN DN40/PN40 400 15.75 D7
350 13.78 S0
mm in
Type single path, welded measuring loops without seals and ange connection
A1 = 285 mm (11.22 in) B1 = 50 mm (1.97 in) Terminal box (without cable gland) 125 x 80 x 58 mm (4.92 x 3.15 x 2.28 in)
A2 = 300 mm (11.81 in) B2 = 70 mm (2.76 in) W = 0 mm for Temperature Range T1 and TA
H1 = 454 mm (17.87 in) V = 26 mm (1.02 in) W = 150 mm (5.91 in) for Temperature Range T2, T3 and T4
H2 = 540 mm (21.26 in)
(*) SF0 construction contains brazed joints (brazing material B-Ni82CrSiBFe-970/1000) which are not as corrosion resistant as the piping material 1.4571 (316Ti). Fully welded
joints for corrosive liquids and higher pressure ratings can be provided – please consult your local agent..
Weight in standard manifold construction with female threads: approx. 14 kg (31 lb)
Weight in standard sealless construction and 150# anges: approx. 16 kg (35 lb)
Shipping on pallet approx. 70 x 40 x 55 cm (27.6 x 15.7 x 21.7 in), gross weight with sealless construction, 150# standard anges and RHE 08 approx. 27 kg (60 lb)
Finish type of our ANSI anges corresponds to SF (AARH 125 up to 250 μin, Ra 3.2 up to 6.3 μm)
For customization with regard to face to face length and special ttings, please consult your local agent
Please note that larger diameter process connections are always possible.
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Pressure Rating RHM 12
The maximum pressure (pmax) of a sensor is determined by its weakest part. The weakest part can be the measuring
loops (pmax indicated below) or the construction type (pmax indicated in the Basic Order Code section, last page) or
the selected anges / ttings (for pmax please see respective standard).
pmax of P1 measuring loops, standard
M1 standard material - 1.4571 (316Ti)
OD x WT 12 x 1 mm (0.472 x 0.039 in)
bar °C psi °F
212 50 3075 122
190 120 2756 248
164 210 2379 410
138 350 2002 662
pmax of P2 measuring loops
M1 standard material - 1.4571 (316Ti)
OD x WT 12 x 1.5 mm (0.472 x 0.059 in)
bar °C psi °F
331 50 4801 122
296 120 4293 248
255 210 3698 410
215 350 3118 662
pmax of P1 measuring loops
M3 optional material - 2.4602 (Alloy C22)
OD x WT 12 x 1 mm (0.472 x 0.039 in)
bar °C psi °F
292 50 4235 122
258 120 3742 248
220 210 3191 410
184 350 2669 662
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Performance RHM 12
Max Flow Rate Qmax = 100 kg/min (220 lb/min),
Qnom (*) = 75 kg/min (165 lb/min)
Standard Models
Flow Rate Uncertainty
kg/min lb/min in % of reading
100 220 0.20
40 88 0.20
10 22 0.20
5.0 11 0.20
2.0 4.4 0.50
Goldline Models (**) - selected sensors
Flow Rate Uncertainty
kg/min lb/min in % of reading
75 165 0.10
40 88 0.10
10 22 0.10
7.50 17 0.10
3.75 8.3 0.12
Uncertainty % DP (bar)
Flow Rate kg/min
Uncertainty % DP (bar)
Low Flow Models (**) - selected sensors
Flow Rate Uncertainty
kg/min lb/min in % of reading
40 88 0.20
20 44 0.20
10 22 0.20
2.0 4.4 0.20
1.5 3.3 0.60
Repeatability
Better ± 0.1% of rate,
Goldline 0.05%
Density
Down to 0.5% uncertainty
Temperature
Better ± 1°C
(*) Nominal ow Qnom refers to roughly 8 - 10 m/s (26 33 ft/s) velocity in measuring loops for best performance.
(**) Selected sensors are only available in combination
with temperature options T1, TA, standard material and
pressure range.
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Flow Rate kg/min
Uncertainty % DP (bar)
Flow Rate kg/min
• Serial/single path versions oer the same accuracy at
half the ow (Qmax serial version = 50 kg/min).
• No relevant pressure eect due to torsional oscillation
and semi-circle (non-deforming) measurement
section.
• Uncertainty of reading (incl. zero drift) indications refer
to reference conditions H
O, 18-24°C (66 - 76°F), 1 - 3
2
bar (15 – 45 psi) and installation according to eld
manual.
• Pressure drop indications refer to H2O, with parallel
measuring loops type P1 and standard manifold block
connections.
• For calibration to customer range and / or with
improved uncertainty, please consult factory.
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General Specications RHM 12
Temperature Range
• NT Models from -20 to +120°C (-4 to +248°F)
• ET Models from -45 to +120°C (-49 to +248°F)
• ET2 Models from -45 to +210°C (-49 to +410°F)
• ET1 Models from -196 to +50°C (-320 to +122°F)
• HT Models from 0 to 350°C (+32 to +662°F)
(Heating for housing optional, please consult your local
agent)
Electrical Connection
• Junction box Aluminium coated (standard). Junction box in
SS 316Ti optional
• Cable entry M25 x 1.5. Optional cable entries M20 x 1.5,
1/2” NPT or 3/4” NPT
• Max cable length between RHM and RHE is 100m (330 ft).
200m (660 ft) only with factory approval
Material of Wetted Parts
• 1.4571 / SS 316 Ti / UNS S31635 (standard)
• 2.4602 / Alloy C22 / UNS N06022
• Tantalum
• Others on request
Sensor Enclosure/Housing
• Stainless Steel 1.4301 / SS 304, optional in 1.4571 / SS
316Ti. Others on request
• Protection Class IP 65. Optional IP 66 / NEMA 4x
Approvals
• ATEX Ex II 1 G, EEx ia IIC T6-T1
• CSA USA-Canada, Class I, Div. 1, Groups A, B, C, D
• PED according to directive 97/23/EC: Art.3 (3) Sound
Engineering Practice (SEP), Module A1 or Module B + C1
(depending on construction type and measured uid)
• Others on request
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Basic Order Code RHM 12
Sensor Size
Temperature Range
T1 NT from -20°C to +120°C (standard)
TA ET from -45°C to +120°C
T2 ET2 Extended Temperature Range from -45°C to +210°C
T3 ET1 Extended Temperature Range from -196°C to +50°C
T4 HT High Temperature Range from 0°C to +350°C
Pressure Range of Measuring Loops@ 120°C and M1 material
P1 pmax = 190 bar, max. CL 1500 (standard)
P2 pmax = 296 bar
Construction Type (pmax indications @ 120°C)
PM0 Parallel Measuring Loops with removable Manifold and PTFE Seals,
pmax = 290 bar with thread connection, 214 bar with ange connection
SM0 Serial Measuring Loops with removable Manifold and PTFE Seals,
pmax = 260 bar with thread connection, 214 bar with ange connection
PF0 Parallel Measuring Loops Seal Less Version
SF0 Serial Measuring Loops Seal Less Version Sanitary, pmax = 42.9 bar
Upon request special, fully welded version, pmax = 246 bar
PFT Parallel Measuring Loops Seal Less Version for Thread Connection, pmax = 250 bar
Material of Wetted Parts
M1 Measuring Loops and Manifold/Connection 1.4571 (316Ti) (standard)
M3 Measuring Loops and Connection Part 2.4602 (Alloy C22),
Seal Less Construction Type only
M4 Measuring Loops and Connection Part Tantalum, PF0 Construction Type only
Process Connection
D1 Flange DIN DN25/PN40 Form C (EN 1092-1 Form B1)
D2 Flange DIN DN25/PN100 Form E (EN 1092-1 Form B2)
A1 Flange ANSI 1” 150# RF/SF
A2 Flange ANSI 1” 300# RF/SF
A3 Flange ANSI 1” 600# RF/SF
A6 Flange ANSI 1” 1500# RF
R1 Flange ANSI 1” 1500# RTJ
G1 Female Thread G 3/4”
N1 Female Thread 3/4” NPT
W1 Swagelok 3/4” Tube inlet (SS-1210-1-12W), standard material only
S0 Sanitary 1” Triclamp, DIN 32676, pmax = 17.2 bar @ 120°C
S4 Sanitary NW20, DIN 11851, pmax = 40 bar @ 120°C
Others on request
RHM 12 - - - -
www.ge-mcs.com
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© 2013 General Electric Company. All Rights Reserved. Specications are subject to change without notice. GE is a registered trademark of General Electric Company. Other company or product
names mentioned in this document may be trademarks or registered trademarks of their respective companies, which are not aliated with GE.
920-496A
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