Differential pressure transmitters

Differential Pressure Transducer Model 274

Differential Pressure Transducer Model 274

The Model 274 Differential Pressure Transducer measures pressure ranges from 5" W.C. to 100 PSID and provides a 0-5 VDC signal. All wetted surfaces, including flanges and diaphragms, are constructed of 316 stainless steel with a sealing Viton® O-Ring for excellent corrosion resistance. A standard 1,000 PSI static line pressure and single side overpressure rating are featured with these transducers. For applications that require a higher static line pressure rating, 3,000 PSI is available with optional flanges.
Model 274 also features an internal calibration circuit for easy field set-up, a quick disconnect electrical connection and external zero and span controls. A special option called fast response enables the unit to accurately respond to changes in pressure in approximately one tenth of the standard time.These features make the Model 274 ideal for most industrial test and flow applications.


Full Scale Pressure Ranges 0-5, 10, 20, 50, 100, 300, 750" W.C.D.
0-15, 50, 100 PSI
  Nonlinearity (Best Fit Straight Line) ≤±0.15% FSO
  Hysteresis ≤±0.08% FSO
Repeatability ≤ ±0.06% FSO
  Full Scale Output (FSO) 5 Vdc at 70° F
  Resolution Infinite
  Long Term Stability ≤±0.1% FSO per 6 months
  Zero Shift with Base Pressure 5” WC to 100” WC : ≤ 4%
300” WC to 100 PSI: ≤ 6
  Span Shift with Base Pressure 5” WC to 100” WC : 0 to -6%
300” WC to 100 PSI : 0 to -4
  Zero Shift After 1000 PSI Overload Single Side: ≤± 0.1% FSO
Alternate Sides: ≤±0.5% FS
Compensated Temperature Range 70°F to 170°F (21°C to 76°C)
Operating Temperature Range 0° F to +200° 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
≤±0.0001% FSO per Volt change over the supply voltage range
Output Signal
0 to 5 Vdc
Load Impedance 3000 Ohms minimum
Current Draw 3.8 mA
  Zero Adjustment ± 10 % FSO min. / ±20% FSO max.
  Span Adjustment ± 10% FSO min. / ±20% FSO max.
  Calibration Signal 80% of the FSPR, by shorting pins E & F
  Calibration Signal Accuracy ≤±0.1% of the stated value

Circuit Protection

Reverse polarity protected
  Insulation Resistance >1000 MegOhms to case ground at 50 Vdc and 70° F
Response Time 10% to 90% FS Faster response available with NF option.
  Electrical Connection Bendix PT02E-10-6P, mates PT06E-10-6S (SR)

Pin Outs

Pin A + Power
Pin B - Power
Pin C + Signal
Pin D - Signal
Pin E Calibrate
Pin F Calibrat


Wetted Materials
316 Stainless steel and Viton O-Ring
304 and 316 Stainless Steel with an Aluminum alloy, black zinc-cobalt plated electrical connector
Weight 3.5 lbs. (6.5 lbs. with optional flanges)
Laser etched onto body


Pressure Connection:
1/4" - 18 NPT female
  Static Pressure 1000 PSI maximum (3000 PSI - optional)
Proof Pressure
1000 PSI single sided (3000 PSI - optional)
  Burst Pressure 1500 PSI (4500 PSI - Optional)
  Diaphragm Displacement

0.002 cubic inches at FSPR

  Diaphragm Displacement Standard Flanges: 0.4 cubic inches
Optional Process Flanges : 1.5 cubic inche
Fill Fluid Dow DC200 Silicone oil
Mounting May be supported by process piping or by optional mounting bracket