Hazardous location transmitters

Model 709 Hammer Union Pressure Transmitter

Model 709 Hammer Union Pressure Transmitter

709 is a 0-5Vdc output hammer union transmitter to monitor pump pressures in oil servicing applications like drilling, cementing, and hydrofracturing. Available with hazardous location approvals and a variety of electrical connections. 

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:



Full Scale Pressure Ranges:
0-5K, 10K, 15K, 20K PSIG (0-345, 689, 1034, 1379 bar)
Combined Accuracy (BFSL):
(Non-Linearity, Hysteresis & Repeatability) ≤ ± 0.25% FSO
Full Scale Output (FSO):
5 Vdc ±1% FSO
  Zero Balance: 0 Vdc ±1% FSO
  Compensated Temperature Range: -20°F to 185°F (-29°C to 85°C)
  Operating Temperature Range: -40°F to 250°F (-40°C to 121°C)
  Storage Temperature Range: -67°F to 302°F (-55°C to 150°C)
  Long Term Stability (%FSO): ≤±0.25% FSO per 6 months
  Response Time: ≤2.5 mSec to reach 90% of FSO
  Thermal Effect on Zero: ≤±1% FSO per 100°F (37°C)
Thermal Effect on Span: ≤±1% FSO per 100°F (37°C)



Output Signal:
0 - 5 Volts at 70°F (21°C)
Supply Voltage:
9-30 Vdc (10.5 to 28 Vdc w/approval)
Power Supply Regulation:
≤±0.01% FSO per Volt
  Load Impedance: 410K Ohms minimum
  Circuit Protection: Varistor protected across the input leads for surges above 1000V at 50 microseconds
Insulation Resistance: ≥100 MegOhms to case ground
Calibration Power : Short pins E & F
Calibration Signal Accuracy: ≤±0.2% FSO. The exact signal to pressure correlation is provided with each unit
Bridge Resistance: 10K Ohms nominal
Standard Electrical Connection: Mates with Bendix P/N PT06E-10-6S or equivalent

PIN B -Power

PIN C +Signal

PIN D -Signal

PIN E Calibration

PIN F Calibration

Some models are provided with customer specified wiring. Consult Viatran for exact wiring connections.



Standard Pressure Port:
Male hammer union 2 inch #1502
Pressure Cavity Volume:
0.4 cubic inches
Zero Effect from Installation:
0.3% FSO w/200 ft-lbs torque on union #2202
  Proof Pressure: 1.67 times the FS or 22.5K PSI (1550 bar) for union #1502
30K PSI (2068 bar) for union #2002 whichever is less
  Burst Pressure:

≥3 times FSPR, limited by union #1502: 22.5K PSI (1550 bar)




Wetted Materials:

Inconel X-750, heat treated per MR0175-2000

Enclosure Material:

304 stainless steel
Laser etched onto body
  Enclosure Rating: NEMA 4X
  Weight: 5.5 lbs nominal (2.4 kg)

Shock Limitation:

100 G’s





Special range


Special calibration ru


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