Low Range Pressure Transmitter - Model 177

The product features low range differential pressure, 500 psi line pressure.

Viatran’s “77” Series differential pressure transmitters are extremely precise and durable units, designed specifically for test applications. The variable capacitance sensing technology offers very high overpressure protection and stability.


  • High Accuracy
  • ShuntCal
  • Many Options available
  • Low Pressure Applications

The Model 177 Low Range transmitter measures pressure ranges from 0-3" W.C. to 0-8" W.C. and offers a 3.0 mV/Vdc signal. All wetted surfaces, including diaphragms and flanges, are produced from 316 stainless steel together with a sealing Viton® O-Ring in order to obtain exceptional corrosion resistance. A single side overpressure rating and standard 500 PSI static line pressure are featured along with these transmitters.

The Model 177 is also available an internal calibration circuit for a quick disconnect electrical connection, effortless field set-up and external zero and span controls. These features allow the Model 177 to be perfect for most industrial test and flow applications.


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Full Scale Pressure Ranges (FSPR) 0-3", 0-5", 0-8" W.C.
Combined Accuracy (Non-Linearity (BFSL), Hysteresis & Repeatability) ≤±0.60% RSS
Full Scale Output (FSO) 3.0 mV/V dc at 70 °F (21 °C) ±2% FSO
Resolution Infinite
Zero Shift w/Line Pressure (%FSO/500 PSI) ≤± 2%
Zero Shift After 500 PSI Overload Single Side: ≤± 0.5% FSO
Alternate Sides: ≤± 0.5% FSO
Compensated Temperature Range 70 °F to 170 °F (21 °C to 77 °C)
Operating Temperature Range 0 °F to +185 °F (-20 °C to 85 °C)
Storage Temperature Range -40 °F to +185 °F (-40 °C to 85 °C)
Thermal Effect on Zero ≤ 2.0% FSO per 100 °F
Thermal Effect on Span ≤ 2.0% FSO per 100 °F



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Supply Voltage 5 to 15 Vdc
Power Supply Regulation <±.01% FSO per Volt (Typical)
Output Signal 3.0 mV/Vdc
Output Loading 3000 Ohms minimum
Current Draw 3.8 mAdc
Range Calibration Signal 80% FSO, by shorting pins E & F
Calibration Signal Accuracy ≤± 1.0%
Circuit Protection Reverse polarity protected
Insulation Resistance < 5 nS to case ground
Standard Electrical Connection Mates with 6 pin, Hermetic, Box Mount, Shell Size 10, MIL-C-26482 bendix type connector
Pin Outs Pin A    + Power
Pin B    - Power
Pin C    + Signal
Pin D    - Signal
Pin E    Shunt Cal
Pin F    Shunt Cal



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Pressure Connection 1/4" NPT female
Line Pressure 500 PSI maximum
Proof Pressure 500 PSI single sided
Burst Pressure 1,100 PSI
Diaphragm Displacement ≈0.1 mL at FSPR
Pressure Cavity Volume 0.4 cubic inches
Mounting May be supported by process piping or by optional mounting bracket
Response Time Consult Engineering


Materials of Construction

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Wetted Parts 316 Stainless steel and Viton® O-Ring
Enclosure Material 304 and 316 Stainless Steel
Identification Laser marked on body of unit
Weight 3.5 lbs.



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B ( ) Alternate electrical connector
DF Bleed Ports
DG Improved temperature compensation
DH Special range
DK Special calibration setting
DW No external adjustments
EA Special calibration run
GC Stainless O-Rings
GE Buna 'N' O-Rings
NH Customer specific identification
PW Calibration of Meter w/Viatran unit
Y ( ) Alternate pressure ports
YW G1/4 (F) port for remote seals
Z ( ) Alternate electrical connector

Application of some available options may affect standard performance.
Consult your Viatran representative for details.

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