Model 521 Hammer Union Pressure Transmitter

4-20 mA output, 2″ 2002 fitting


 2002 Hammer Union Pressure Fitting
 Many Options available
 RoHS Compliant
 High Pressure Applications


521 is Viatran’s state of the art hammer union pressure transmitter with industry exclusive features that were developed in direct response to requests from the field. Included in these features is a voltage powered shunt cal, ability to calibrate and track pressure spikes using HART software and packaged in a patented housing which can withstand extreme vibration and abusive impact and still perform to specification.

Expanded compensated temperature range

Improved sealing method for connector pins

External adjust, identification and peak pressure capture

Potential applications include Acidizing, Choke Manifolds, Extraction, Fracturing and Cementing,Mud Pumps, New Well development, Nitrogen Injection, Service and Cement Trucks, Standpipe, Stimulation and Well head measurement.

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
<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 A+ Power / Signal
PIN B– Power / Signal
PIN CNo Connection
PIN DNo Connection
PIN E+ Calibration
PIN F– Calibration