Hazardous location transmitters

Model 544 Pressure Transducer

Model 544 Pressure Transducer

The 544 features a special internal calibration signal that allows users to calibrate the transmitter without an external pressure source. The 544 provides a 4 to 20 mA output signal measuring pressures from 0 to 5" WC thru 0-100 PSIG. External zero, span, and calibration controls are hermetically sealed for protection against harsh environments. These controls are externally adjustable with Viatran’s unique magnetically coupled drive system.

Model 544 also has a signal conditioner that allows for 5:1 ranging of the transmitter’s standard pressure range (FSPR).
Designed to meet intrinsically safe standards, the 544 provides reliable and safe pressure measurement in harsh process applications.


Full Scale Pressure Ranges 0-5, 10, 20, 50, 100, 300, 750" W.C.G
0-15, 50, 100 PSIG
0-15 PSI
  Nonlinearity (Best Fit Straight Line) ≤±0.15% FSO
  Hysteresis & Repeatability ≤±0.10% FSO
Full Scale Output (FSO) 16 mA at 70° F
  Long Term Stability ≤±0.2% FSO per 6 months
  Compensated Temperature Range 70°F to 170°F (21°C to 76°C)
  Ambient Operating Temperature Range -10° F to +220° F
  Storage Temperature Limits -65° F to +250° F
  Temperature Effect on Zero <± 1.0% FSO per 100° F
  Temperature Effect on Span <± 1.0% FSO per 100° F


Supply Voltage:
8.5 to 40 Vdc
Power Supply Regulation
±0.02% FSO per volt
Output Signal
4-20 mA at 70° F
  Load Impedance 1500 Ohms maximum at 40 Vdc
  Zero Adjustment Elevation -100% of FS
Suppression +50% of FSO
  Span Adjustment +50% of FSO
  Span Adjustment Rangeable down 5:1 from standard rang
  Calibration Signal 20% of FSPR, externally switched
  Calibration Signal Accuracy The exact signal to pressure correlation is provided with each unit
  Circuit Protection Varistor protected across the input leads for surges above 40V and currents to 250 Amps peak with a pulse width of 8x20 µ Sec.
Reverse polarity protecte
  Insulation Resistance < 5 nS
  RFI / EMI Suppression <1.0% FSO from 0 to 15 MHz at 2V peak to peak direct contact
  Electrical Connections 1/2" NPT Male, 3 Wires, 18 AWG, 36"
Connection Color Codes
Red + Power / Signal
Black - Power / Signal
Green Case Ground


Enclosure Materials
316 Stainless steel
316 Stainless Steel with a Cadmium plated electrical connecto
3.5 lbs. nominal
Identification Laser etched onto body


Pressure Connection
1/4" - 18 NPT female
Proof Pressure
500 PSI
Burst Pressure
1000 PSI
  Shock Limitation 5 Gs
  Fill Fluid Silicone oil
Enclosure Classification NEMA 4X
Mounting May be supported by process piping or by optional mounting bracke