Setra ASL High Accuracy Low Differential Pressure Transducer


  • 0.25% typical total error band
  • Reduce calibration time
  • High accuracy: ±0.07% FS
  • Endpoint method linearity
  • High overpressure capability: >100X range
  • Low thermal error
  • Excellent stability: <0.15% FS/YR
  • Calibrate using SecureCal™ calibration key
  • High line pressure capability
  • Unidirectional & bidirectional models



Setra’s Model ASL is the highest accuracy transducer for measuring low differential pressure in the AccuSense™ product line. Its ±0.07% FS accuracy is calibrated using the “End Point Method” which improves linearity when compared to competitive transducers, which use the “Best Fit Straight Line Method” of calibration. The ASL’s calibration is tamper-proof by utilizing a SecureCal™ calibration key which eliminates inadvertent adjustments while allowing authorized users to adjust the sensor’s calibration coefficients for true sensor calibration. The design of the ASL offers class-leading overpressure capability and multiple pressure and electrical fittings to accommodate a wide range of applications.


Key Benefits

  • High Accuracy For Demanding Applications
    The Model ASL differential pressure transducer uses a resonant variable capacitance sensor. This sensor is linearized and thermally compensated through a computerized curve fitting algorithm that optimizes the sensor’s linearity for maximum accuracy in demanding applications.
  • Robust Design & Construction For Reliable Service
    The Model ASL is designed and built to withstand demanding applications. The laser welded sensor construction, designed with positive and negative overpressure stops, enables the sensor to resist overpressure conditions up to100X in all pressure ranges.
  • Fast & Secure Calibration
    The Model ASL is ideal for the Test & Measurement industry because it adheres to the stringent accuracy requirements. In order to make adjustments, the ASL utilizes the SecureCal™ calibration key, providing secure calibration. The SecureCal™ provides the ability to calibrate zero
    and span coefficients through a simple push button and rotary adjustment dial. The SecureCal™ also offers the option to restore factory defaults for fail-safe sensor calibration.


  • Filter pressure
  • Leak detection systems
  • Exhaust pressure
  • Medical instrumentation
  • Part integrity testing
  • Test stands
  • Wind tunnels
  • Industrial high accuracy

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.



Performance Data
Internal volumes Positive Port 0.03 cu. in.
Reference Port 0.75 cu. in.
Operable line pressure Vacuum to 250 PSI max
Maximum volume change at FS 0.002 cu. in.
Long-term stability <0.15% FS/Year, Typical
Response time to pressure input
(From 100% to 10% of pressure range)
<10 ms for Voltage Output
<50 ms for Current Output
Line pressure effect 2% FS/100 PSIG
Zero offset position effect <0.1%/G
Unit factory calibrated in vertical position (pressure port downward)
Physical Description
Electrical terminations 6-Conductor Cable, Pigtail
6-Pin Bayonet Connector
Dimensions See reverse side
Weight 13 oz. (360 g)
Moisture/splash resistance NEMA 4X (IP65)
Pressure fittings See ordering information
Case materials Stainless steel
Environmental Data
Temperature calibrated °F (°C) -4 to +140 (-20 to +60)
Operating temperature1 °F (°C) -40 to +124 (-40 to +85)
Storage temperature °F (°C) -40 to +185 (-40 to +85)
Higher or lower limits available (consult factory)
Electrical Data
Excitation range 9 to 30VDC (5VDC & 4-20 mA output)
15 to 30VDC (10 VDC output)
Current consumption2 <23 mA
Miswiring Reverse Excitation Protection
Warm-up, Environmental Within ±0.02% FS after 15 min warm-up time
Signal output ranges 0 to 5 VDC, 0 to 10 VDC (4-wire),
4-20mA (2-wire)
Accuracy data Accuracy code “A”  Accuracy code “C”
Accuracy < ±0.07% FS RSS ≤ ±0.1% FS RSS
Non-linearity, End-point (typ.) < ±0.03% FS ≤ ± 0.08% FS
Hysteresis (typ.) < 0.03% FS ≤ ±0.06% FS
Non-repeatability (typ.) < ±0.02% FS ≤ ±0.04% FS
Span setting tol. < ±0.1% FS < ± 0.15% FS
Zero offset tol. (typ.) < ±0.1% FS < ±0.20% FS
Thermal total error band (-20°C to 60°C) < ±0.25% FS
< ±0.5% FS Max
< ±0.5%
< ±1% Max.
Pressure Media
Clean, dry gases compatible with 300 series stainless steel and 17-4 pH stainless steel.


Setra ASL High Accuracy Low Differential Pressure Transducer_DpstarGroup