Hazardous location transmitters

Model 520 Hammer Union Pressure Transmitter

Model 520 Hammer Union Pressure Transmitter

Viatran's Model 520 Hammer Union Pressure Transmitter offers superior construction and the rugged performance that we have built our reputation on. 

Inquiry system 

Configure your own product according to your requirements and needs. If you are unsure of the configuration, provide us in the notes the necessary information about the existing sensor or product, even a competitor. We will be happy to help you find an alternative Viatran product. If your request is urgent, let us know. We will do our best to help you resolve this situation to your satisfaction as quickly as possible. If we have all the information, we are able to offer a model with minor differences, which is in stock and you can have another product available the next day.

If you need more information do not hesitate to contact us.

Viatran Configuration Code:

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Full Scale Pressure Ranges:
0-5K, 0-6K, 0-10K, 0-15K, 0-20K, 0-25K PSIS
Combined Accuracy (BFSL):
(Non-Linearity, Hysteresis & Repeatability) ≤ ± 0.25% FSO
Full Scale Output (FSO):
16.00 mA ±1% FSO @70°F
  Zero Balance: 4 mA ±1% FSO @70°F
  Compensated Temperature Range: -40°F to 140°F (4°C to 60°C)
  Operating Temperature Range: -40°F to 185°F (-40°C to 85°C)
  Storage Temperature Range: -67°F to 302°F (-55°C to 150°C)
  Long Term Stability (%FSO): ≤ ± .25% FSO per 6 months
  Thermal Effect on Zero: ≤± 1% FSO per 100°F Typical
Thermal Effect on Span: ≤± 1% FSO per 100°F Typical



Output Signal:
4-20 mA @70°F
Supply Voltage:
9-28 Vdc
Power Supply Regulation:
<± .01% FSO per volt
  Load Impedance: 900 ohms @ 28 VDC decreasing linearity to 0 ohms @ 9 VDC
  Circuit Protection: Reverse polarity protected
  RFI / EMI:

<1% FSO output change with 3V Rms from 150 kHz to 80 MGz

(80% AM modulated at 1 kHz) applied to power supply and signal lines

[IEC 61000-4-6 radio frequency common mode immunity],

1% output change when exposed to a radiated electromagnetic

field of 10 V/m from 80 MHz to 1 GHz AM modulated at 1 kHz and 3 V/m

1.4 GHz to 2.7 GHz. [IEC 61000-4-3 Radiated electromagnetic field immunity]

Voltage Spike Protection: Withstand 1000 volt spike per EN 61000-4-5
Insulation Resistance: < 5 nS
Response Time: < 1 millisecond to reach 90% of FSO
Range Calibration Signal: 100% FSO ±10% by exciting pins E&F
Calibration Power Supply Voltage: 8.5 -28 VDC
Calibration Signal Accuracy: Readings on calibration certificate are within ±0.2% FSO of actual Cal signal output
Bridge Resistance: 10K ohms, nominal
Standard Electrical Connection: Mates with 6 pin, Hermetic, Box Mount, Shell Size 10, MIL-C-26482 bendix type connector
PIN OUTS: PIN A + Power / Signal

PIN B - Power / Signal

PIN C No Connection

PIN D No Connection

PIN E + Calibration

PIN F - Calibration



Standard Pressure Port:
Male hammer union 2 inch #2002
Pressure Cavity Volume:
Standard: 0.45 cubic inches
Zero Effect from Installation:
0.3% FSO w/200 ft-lbs torque on union #2002
  Shock Sensitivity: 1000 g, 0.5 ms half sine wave pulse shall not cause change in calibration
  Proof Pressure: 1.67X range or 30,000 PSI max
  Burst Pressure:

3 Times full scale pressure range, limited by union #2002: 30K PSI




Wetted Materials:

NACE compliant Inconel 718 (MR0175/ISO 15156-3:2009(E)) 

Enclosure Material:

304 Stainless Steel
Laser marked on body of unit
  Enclosure Rating: IP68*, NEMA 6P*
  Weight: 4.0 lbs. nominal
  * Pending approvals






Extended Compensated Temperature Range (Cold) -40°F to 140°F (-40°C to 60°C)


Improved temperature compensation
Special Range


Improved accuracy


Special Calibration Run


Extended Compensated Temperature Range (Hot) +40°F to 180°F (4°C to 82°C)



Narrow adapter for banding


Carrying handle attached


Customer specific identification


Protective ring cage
NQ: Protective criss-cross cage


Special connectors