High performance pressure transducer

Model 344 Pressure Transmitter

Model 344 Pressure Transmitter

The Model 344 offers a 4 to 20 mA signal. Using our variable capacitance technology, the Model 344 transmitter provides extreme overpressure protection up to 500 PSI. This sensor design provides standard accuracy of <±0.15% FSO. The unit also offers standard temperature performance to ±2%/100° F with an improved option to±1%/100° F.
All wetted surfaces of the X44 Series are constructed with 316 stainless steel, making them ideal for wet/wet applications.In environmental test chambers, these surfaces withstand contaminants such as water vapor, oil, exhaust or mists.

Atmospheric reference is specially constructed to withstand the ingress of moisture, ensuring accurate pressure measurement.
Model 344 features an internal calibration circuit for easy field set-up, a quick disconnect electrical connection and external zero and span controls. These features allow you to calibrate the transducer without an external pressure source and eliminate the need to send the unit to a metrology lab for calibration.


Full Scale Pressure Ranges (FSPR):

0-5, 10, 20, 50, 100, 300, 750" W.C.
0-15, 50, 100 PSIG

Nonlinearity (Best Fit Straight Line):
≤±0.15% FSO
≤±0.10% FSO


≤±0.10% FSO

Full Scale Output (FSO):

16 mA at 70°F (21°C)
  Long Term Stability: ≤±0.2% FSO per 6 months

Zero Shift After 500 PSI Overload

≤± 0.1% FSO

Compensated Temperature Range

70°F to 170°F (21°C to 76°C)

Ambient Operating Temperature Range

0° F to +250° F
  Storage Temperature Limits: -40°F to 250°F (-40°C to 121°C)
Temperature Effect on Zero: <± 2.0% FSO per 100° F
Temperature Effect on Span: <± 2.0% FSO per 100° F


Supply Voltage:
10 to 42 Vdc
Power Supply Regulation:
≤±0.1% FSO change over the supply voltage range
Output Signal:
4 to 20 mA 
Load Resistance: 1600 Ohms with input voltage change from 10 to 42 Vdc 

Zero Adjustment

± 5 % FSO min

Span Adjustment

± 10% FSO min

Calibration Signal

80% of FSPR, by shorting pins C & D

Calibration Signal Accuracy

≤±0.5% FSO

Circuit Protection

Reverse polarity protected

Insulation Resistance


Response Time

From 0.2 Sec for 5" W.C. range down to 0.008 Sec for 100 PSI range. Faster response available with NF option.

Electrical Connection

Bendix PT02E-10-6P, mates PT06E-10-6S (SR)

Pin Outs

Pin A + Power / Signal
Pin B - Power / Signal
Pin C Calibrate
Pin D Calibrate
Pin E No Connection
Pin F No Connection


Wetted Parts
316 Stainless steel
304 and 316 Stainless Steel with an Aluminum alloy, black zinc-cobalt plated electrical connector
3.6 lbs.
Identification Laser etched onto body


Pressure Connection:
1/4" - 18 NPT female
Proof Pressure:
500 PSI
Burst Pressure:
1000 PSI

Pressure Cavity Volume:

1.5 mL

Position Sensitivity

≤ ± 1.0” W.C. in any orientation

Shock & Vibration

≤ ± 1.0% FSO per G for 50 Hz to 200 Hz along any axis


.May be supported by process piping or by optional mounting bracket

Fill Fluid

Dow DC200 Silicone oil