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WIKA · Pressure measurement · Family 712

Differential pressure gauge

Cryo Gauge, copper alloy or stainless steel, NS 160
Range
0…4000 mbar
Output
4-20 mA · 4-20mA
Accuracy
2.5
Protection
IP65
CEEACRoHSREACHGOSTKazInMetrMTSCHSBelGIMUzstandardCPACRNBAMEx ia IIC T6/T5/T4 GbII 2G Ex ia IIC T6/T5/T4 GbATEX: II 2G Ex ia IIC T6/T5/T4IECEx: Ex ia IIC T6/T5/T4 Gb
Price
On request
Depends on configuration
Request a quote
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Description

These high-quality differential pressure gauges are notable for their compact and robust design and are primarily used for level measurement on liquid gas tanks.

With 6 different measuring cells, all usual tank sizes in cryotechnology are covered. The large overlap in measuring ranges of the measuring cells enables the setting for gas types such as Ar, O 2 , N 2 or CO 2 over the entire scale with 270 angular degrees. The span adjustment is accessible from outside and does not affect the zero point.

for further approvals see page 4

Special features

  • Differential pressure measuring ranges from 0 … 40 mbar to 0 ... 4,000 mbar
  • High working pressure (static pressure) of 50 bar
  • Overpressure safety either side up to 50 bar
  • Scalable measuring ranges (maximum turndown of 1 : 3.5)
  • Compact valve manifold with working pressure indication (optional)
Identification
Model712.15.160
Product family712
SubcategoryDifferential pressure gauge
Measuring range
Pressure ranges0…40 mbar · 0…140 mbar · 0…280 mbar · 0…560 mbar · 0…1130 mbar · 0…2300 mbar · 0…4000 mbar · 0…80 mbar · 0…160 mbar · 0…320 mbar · 0…650 mbar · 0…1150 mbar
Accuracy
Accuracy class2.5
Accuracy standardEN 837-1
Process conditions
Process connection
2 x G ¼, female, centre distance 37 mm2 x ¼ NPT, female, centre distance 37 mm2xG 1/4 female, centre distance 37 mm2 x 1/4 NPT female, centre distance 37 mmG 1/4 female, centre distance 37 mm1/4 NPT female, centre distance 37 mm
Process temperature−40…+80 °C
Electrical characteristics
Output signal4-20 mA
Power supply12...30 V DC
Electrical connectionCable socket PA 6, black
Switching functionExceeds set point (index 1), breaks at set point (index 2), change-over contact (index 3)
Switching contacts1
Materials
Case materialStainless steel
Wetted parts materialCopper alloy CW614N (CuZn39Pb3), Stainless steel 316L, Stainless steel 1.4310, NBR, Stainless steel 1.4301, Stainless steel 1.4305
Sealing materialNBR, PTFE
Operating environment
Ambient temperature−40…+80 °C
IP ratingIP65
Certifications and approvals
Certifications
CEEACRoHSREACHGOSTKazInMetrMTSCHSBelGIMUzstandardCPACRNBAM
Explosion protection
Ex ia IIC T6/T5/T4 GbII 2G Ex ia IIC T6/T5/T4 GbATEX: II 2G Ex ia IIC T6/T5/T4IECEx: Ex ia IIC T6/T5/T4 Gb
Additional details
Dial size160 mm
Datasheet languagesEN, DE
Tables from datasheet
Models 712.15.160 and 732.15.160
Nominal size inmm160
Accuracy class2.5 Option: ■ 1.6 ■ 1.0
Scale rangesMeasuring cell 140 mbar: Setting range 0 Measuring cell 280 mbar: Setting range 0 Measuring cell 560 mbar: Setting range 0 Measuring cell 1,130 mbar: Setting range 0 Measuring cell 2,300 mbar: Setting range 0 Measuring cell 4,000 mbar: Setting range 0…40mbar to 0 …140 mbar …80mbar to 0 …280 mbar …160 mbar to 0 …560 mbar …320 mbar to 0 …1,130 mbar …650 mbar to 0 …2,300 mbar …1,150 mbar to 0 …4,000 mbar
ScaleSingle scale Option: Individual scale design
Zero point settingBy means of adjustable pointer
Overload safety and max. working pressure (static pressure)Either side max. 50 bar
Connection locationLower mount (radial)
Process connection■ 2xG ¼ , female, centre distance37mm ■ 2 x ¼ NPT, female, centre distance37mm others on request Option: Adapter for process connection, see page 6
Wetted materials
Measuring cell flangesModel 712.15: Copper alloy CW614N (CuZn39Pb3) Model 732.15: Stainless steel 316L
Compression springStainless steel 1.4310
Separating diaphragmNBR
Transmission partsStainless steel 1.4301 and 1.4305
Non-wetted materials
CaseStainless steel
Bayonet ringStainless steel
MovementStainless steel
DialAluminium, white
PointerAdjustable pointer, black aluminium
WindowPolycarbonate (PC)
Ingress protection per IEC/EN 60529IP65
MountingAccording to affixed symbols ⊕high pressure, ⊖low pressure
Non-Ex version: Models 712.15.160 and 732.15.160 optionally with model 891.44 1)Ex version: Models 712.15.160 and 732.15.160 with model 892.44 1)
Ambient-40 …+60 °C with oxygen -40 …+80 °C-40 ...+60 °C for temperature class T6 and T5 -40 ...+80 °C for temperature class T4
Medium-40 …+60 °C with oxygen -40 …+80 °C-40 …+60 °C with oxygen -40 ...+60 °C for temperature class T6 and T5 -40 ...+80 °C for temperature class T4
LogoDescriptionCountry
EU declaration of conformity ■ EMCdirective ■ Pressure equipment directive ■ ATEX directive (option) 1) Hazardous areas - Ex ia Gas [II 2G Ex ia IIC T6/T5/T4European Union
IECEx (option) 1) Hazardous areas - Ex ia Gas [Ex ia IIC T6/T5/T4 Gb]International
EAC (option) ■ EMCdirective ■ Pressure equipment directive ■ Low voltage directive ■ Hazardous areas 1)Eurasian Economic Community
GOST (option) Metrology, measurement technologyRussia
KazInMetr (option) Metrology, measurement technologyKazakhstan
-MTSCHS (option) Permission for commissioningKazakhstan
BelGIM (option) Metrology, measurement technologyBelarus
Uzstandard (option) Metrology, measurement technologyUzbekistan
-CPA Metrology, measurement technologyChina
-CRN Safety (e.g. electr. safety, overpressure, ...)Canada
BAM Oxygen applicationGermany
Specifications
Valves2 x shut-off valve, 1 x pressure compensating valve
Test connectionM20 x 1.5 with sealing cap (DIN 16287-A)
Valve body■ Copper alloy CW614N (CuZn39Pb3) for model 712.15 ■ Stainless steel 316L for model 732.15
Spindle with conical nipple■ Copper alloy for model 712.15 ■ Stainless steel 316L for model 732.15
Packing/sealingNBR/PTFE With the valve fully-opened, the spindle area is isolated from the process by a metallic seal, the packing is not loaded and the spindle thread is not in contact with the measured media.
Working pressure indication■ Bourdon tube pressure gauge, copper alloy; model 212.20.100; see data sheet PM02.01 ■ Bourdon tube pressure gauge, stainless steel, model 232.50.100, see data sheet PM02.02 ■ Bourdon tube pressure gauge, stainless steel, safety version; model 232.30.100; see data sheet PM02.04
View all (6)
Specifications
Material■ Copper alloy CW614N (CuZn39Pb3) for model 712.15 ■ Stainless steel 316L for model 732.15
Process connections (wetted)2 x G¼, female, centre distance 31 mmor 54 mmor 2 x ¼NPT, female, centre distance31mmor54mm
SpecificationsModels 891.44 and 892.44 (Ex version)
Output signal4 …20mA, 2-wire
Supply voltage U BNon-Ex version, model 891.44:DC 12V < U B ≤ 30V Ex version, model 892.44:DC 14V < U B ≤ 30V
Influence of supply voltage≤ 0.1 %of full scale/10V
Permissible residual ripple≤ 10 %ss
Permissible max. load R ARA ≤ (U B - 12 V)/0.02 A with R A in Ωand U B in V, however max.600Ω
Effect of load≤ 0.1 %of full scale
Adjustability
Zero point, electricalAdjustment of the zero point through brief bridging of terminals 5 and 6 or using the &#x27;scale selection switch&#x27; option, selectable via button 1)
Scale selection4 scales selectable via BCD switch
Linear error≤ 1.0 %of span (terminal method)
Compensated temperature range-40 …+80 °C
Temperature coefficients in the compensated temperature range
MeanTC zero point≤ 0.3 %of span/10 K
MeanTC span≤ 0.3 %of span/10 K
Electrical connectionCable socket PA 6, black PerVDE 0110 insulation group C/250V Cable gland M20 x 1.5 Strain relief 6 screw terminals + PE for conductor cross-section2.5 mm²
Electrical safetyProtection against reverse polarity and overvoltage
Ingress protectionIP65 per EN/IEC 60529
Safety-related maximum values for Ex version, model 892.44
Supply voltage U iDC 14 ...30V
Short-circuit current I i≤ 100mA
Power P i≤ 720mW
Internal capacitance C i≤ 17.5 nF
Internal inductance L inegligible
Designation of connection terminals, 2-wireDo not use thisTerminals 3, 4, 5 and 6: For internal use only
terminal UB+/Sig
+0 V/Sig-Connection  must not be used for equipotential bonding.The instrument must be incorporated in the equipotential bonding via the process connection.