Setra 231 Differential Pressure Transducer


  • Dual sensors
  • Suitable for harsh environments
  • 3 & 5 valve manifold assembly options
  • 4 Field Selectable Outputs
  • 8 Field Selectable Pressure Ranges
  • Field Accessible Push-Button Zero & Remote Zero
  • Hinged Cover
  • Optional LCD Display
  • NEMA 4 Rated Housing, All Cast Aluminum
  • CE & RoHS Compliant



Setra’s 231 is a multi-configurable, wet-to-wet differential pressure transducer offering the user an all-in-one device with field selectable pressure ranges and analog outputs. The device is offered with an optional 3 or 5 valve machined brass manifold for ease of installation and maintenance. The 231 has a robust, NEMA 4 enclosure with a hinged, captive cover allowing for easy access to switches for adjusting the range and output. An optional display is available that allows users to view high, low, and differential pressure readings on a simple rotating cycle.

Key Benefits

  • Field selectable pressure ranges
    The 231 offers 8 field selectable pressure ranges which can be changed using a slide switch, reducing risk of installing the wrong range unit. The multi-range functionality allows the user to hold less inventory and add additional flexibility in the field.
  • Quick and simple installation
    The 231 provides the user with an optional 3 or 5 valve machined brass manifold which can save money on installation and maintenance. The single piece construction of the brass body has no internal process connections, eliminating the risk of internal leaks.
  • Robust enclosure for difficult applications
    The 231 NEMA 4 housing offers an optional LCD display for instant indication of the high, low and differential pressure readings. A hinged enclosure makes it suitable for harsh environments and saves the hassle of misplacing it when completing a difficult installation.



  • Energy management systems
  • Process control systems
  • Flow measurement of various gases or liquids
  • Liquid level measurement of pressurized vessels
  • Pressure drop across filters

Dpstar is an authorized distributor of Setra Systems. We provide our customers with the best selection of instrumentation and equipment with unrivaled prices to perform in Pressure Sensing Solutions. Setra’s pressure sensors are known for their quality and reliability. Designed with premium capacitive sensing technology, Setra offers single-range and multi-range (field selectable) pressure sensors. Capable of measuring both liquid and gasses, Setra has the product to meet a breadth of HVAC applications and can be trusted in your most critical applications. Trust Setra’s over 50 years of pressure transducer engineering excellence.



Electrical Data (voltage)
Circuit 3-Wire
Excitation 15 to 30 VDC/18 to 30 VAC (Reverse Excitation Protected)
Output1 0 to 5 VDC, 0 to 10 VDC, 1 to 5 VDC
Output impedance 30 Ω
Circuit consumption 8 mA (typ.) at 5 VDC, 8 mA (typ) at 10 VDC, 40 mA (typ.) at 18-30 VAC
Electrical Data (current)
Circuit 2-wire (reverse excitation protected)
Output2 4 to 20 mA
External load 0 to 250 Ω
Min. supply voltage 15 VDC + 0.02 x (resistance of receiver plus line)
Max. supply voltage 30 VDC + 0.004 x (resistance of receiver plus line)
Physical Description
Case Die cast aluminum, powder coated
Pressure fittings 1/8-18 NPT internal
Electrical connection 1/2 in. conduit
Size 4.0 x 6 x 2 in. (102 x 152 x 51 mm)
Weight 1.5 lb
Sensor vacity volume 0.2 cc
Environmental Data
Operating3 temperature °F (°C) -4 to +185 (-20 to -85)
Storage temperature °F (°C) -4 to +185 (-20 to +85)
Vibration 10g from 50Hz to 2000 Hz
Shock 200g
Performance Data
Accuracy RSS4 (at a constant temp.)
Pressure ranges A, B, C ±1.0% FS
Pressure ranges D ±2.0% FS
Pressure ranges (PSID)
Range Code A B C D Max. line pressure
MS1 50 25 10 5 50
MS2 100 50 20 10 100
MS3 250 125 50 25 250
Pressure Media
Liquids or Gases Compatible with 17-4 PH Stainless Steel
Note: Hydrogen is not recommended for use with 17-4 PH stainless steel
Thermal Effects5
Compensated range °F (°C) +32 to +130 (0 to +54)
Zero/Span Shift %FS/100°F (50°C) 2.0 (1.8)
Warm-up shift <0.12% FS
Surge damping 1 to 5 sec. (selectable)
Proof pressure 2 x Full Scale
Burst pressure 15 x Full Scale (50 PSI),
10 x Full Scale (75 x 150 PSI),
8 x Full Scale (250 PSI)



Setra 231 Differential Pressure Transducer_DpstarGroup