Setra 231RS Multi-Configurable, Wet-to-Wet Differential Pressure Transducer


  • Remote Sensor Design
  • Labor and Material Costs Cut By One Third
  • Field Selectable Ranges
  • Field Selectable Outputs
  • Field Accessible Push Button & Remote Zero
  • Jumper Selectable Port Swap
  • All Cast Aluminum, NEMA 4 Rated Housing
  • CE & RoHS Compliant



Setra’s Model 231RS is the industry’s first multi-configurable, wet-to-wet differential pressure transducer utilizing remote sensors. This design reduces labor and material costs versus traditional copper piping installations. The 231RS has a robust, NEMA 4 enclosure with an LCD display and a hinged, captive cover allowing for easy access to switches in order to adjust 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

  • Advantages of Remote Sensors
    Remote sensors provide multiple advantages. By connecting the high and low side transducers at the point of measurement instead of running copper piping back to the transducer, the labor and material costs are cut by one-third.
  • All-Inclusive Field Selectable Design
    The 231RS has a multi-configurable design, providing the user with field selectable ranges and outputs as well as a push button or remote zero. This design gives the user total flexibility to make changes on the job site.
  • Multiple Connector Options for Added Flexibility
    The 231RS offers remote sensors that connect to the unit via armored jacket, cable, or conduit fitting available in 10, 20, 30, 40, and 50-foot lengths. With the remote sensors, there is no need for a 3 or 5 valve manifold and no risk to compromising the electronics.
  • Display Options Available
    The 231RS has an optional LCD display which gives the user the ability to view the high, low, and differential pressure outputs locally at the device. The visual indicator gives instant feedback providing performance validation to the user.


  • 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 1/4-18 NPT Male
Electrical connection 1/2 in. conduit
Size 4.0 x 6 x 2 in. (102 x 152 x 51 mm)
Weight 1.3 lb
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
Range code A B C D Max. line pressure
RS1 50 25 10 5 50
RS2 75 37.5 15 7.5 75
RS3 100 50 20 10 100
RS4 150 75 30 15 150
RS5 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
Response Time 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)
1 Calibrated into a 50K ohm load, operable into a 5000 ohm load or greater.
2 Calibrated at factory with a 24 VDC loop supply voltage and a 250 ohm load.
3 Operating temperature limits of the electronics only. Pressure media temperatures may be considerably higher or lower.
4 RSS of Non-Linearity, Hysteresis, and Non-Repeatability.
5 Units calibrated at nominal 70˚F. Maximum thermal error computed from this datum.
6 Not recommended to connect vac excitation to earth (safety) ground.
Specifications subject to change without notice.



Setra 231RS Multi-Configurable, Wet-to-Wet Differential Pressure Transducer_DpstarGroup