Wet Differential Pressure Sensor

Higher Reliability, Faster Installation, Superior Accuracy | Sense the Difference
±0.25% accuracy
Stand-alone transducer, 3-valve, or 5-valve options
Rugged IP65 construction for harsh environments
Optional LED display for ease of commissioning and troubleshooting

  • Temperature compensated element for high accuracy in any environment
  • 3-valve or 5-valve bypass options available to meet specifications
  • DIN 43650 connector with screw terminals - no splicing necessary
  • Versatile 1/2” FNPT allows simplified conduit connections - connect to any EMT, flex, or liquid-tight conduit
  • Easy-access bleed valves for quick commissioning
  • Calibration certificate included with every sensing element
  • Optional LED display is highly visible and makes commissioning and troubleshooting simple (IP65)

Ask for a quotation

Senva’s PW31 Series is designed to streamline installation and provide maximum accuracy. Options for standalone transducer or 3-valve and 5-valve bypass assemblies allow flexibility and save time on installation and commissioning. The single-diaphragm element is temperature compensated to provides superior ±0.25% accuracy. The PW31’s compact, light, and rugged structure combined with IP65 stainless steel construction make it ideal for most installations and capable of withstanding the most rugged environments. Now available with a highly visible, loop-powered LED display. Just plug it in for ease of commissioning and troubleshooting (4-20mA version only).

  • Meet rigid accuracy and/or bypass specifications
  • Demand measurement in HVAC systems for pump speed control and local indication
  • Process control systems
  • Measurement of gases, vapors, and liquids
  • Measure pressure changes on pumps for efficiency regulation and energy savings
  • Level measurement in tanks and vessels
  • Filter status monitoring
  • System leak detection
  • Great for data center wet pressure sensing

Power Supply

15-35vdc, 20mA max.

Outputs

2-wire 4-20mA, 3-wire 0-10V, 3-wire 0-5V
Operating Temperature (3)

Operating Temperature
Compensated range

-4 to 175°F (-20-80°C)
30 to 158°F (0-70°C)

Media Compatibility Transmitter

Transmitter Only

316L SS compatible liquids and gases, Fluororubber O-rings
Media Compatibility Manifold

Connection
Manifold O-Rings
Manifold Valves
Manifold Material

Copper tube, CW614n Brass fittings (2.5-3.5% lead content)
Neoprene
Glass filled Acetal (Polyacetal Resin)
Anodized Aluminum

Sensor Performance

Type
Temp coefficient zero
Temp coefficient span
Line Pressure Effect
Differential Pressure Ranges

Differential Overload Pressure
Maximum Pressure (1)
Accuracy (2)

Sensor Enclosure
Long Term Stability
Shock and Vibration
EMI/RFI Protection

Micro-machined silicon strain gauge
For units <25PSI: ±1.7% FS/100°F; ±1.5%FS/50°C For units >25PSI: ±1.1% FS/100°F; ±1.0%FS/50°C
For units <25PSI: ±1.7% FS/100°F; ±1.5%FS/50°C For units >25PSI: ±1.1% FS/100°F; ±1.0%FS/50°C

Zero Shift ≤0.0035%FS/PSIG line pressure
0-5, 0-10, 0-25, 0-50, 0-100, 0-150 PSID

150%FS
500%FS
±0.25%FS

Laser welded housing, IP65
±0.5 %FS/Year
30G. 5G @ 50Hz; 10G peak
Per CE Requirements

Connection

Pressure Connection Transmitter
Pressure Connections Manifold
Electrical Connection
Environmental

1/4” NPT Female
1/4” NPT female
DIN43650A
IP65 (Installed with water-tight fittings)
1/2” conduit adapter included

Display

Accuracy
Output
Voltage Drop
Sample Rate
Environmental

0.1%
4-20mA
<3.5VDC
4/s
IP65

Agency

Transmitter Only
Manifold

CE, RoHS
CE

(1) This is the maximum gauge pressure to maintain 0.25% accuracy.
(2) FS is defined as the full scale of the selected range. Accuracy includes non-linearity, hysteresis, repeatability, zero, and span tolerance.
(3) Stated operating range is for electronics only; Media temperature may be considerably higher. Use of devices outside of compensated range may result in drift.

RELATED PRODUCTS