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High-precision, wet/wet differential pressure transmitter - Model PN1M

Differential pressure transmitter PN1M

Product description

Featuring a state-of-the-art digital compensation and two pressure ports for high and low pressures, Senzors’ model PN1M is our most accurate and precise wet/wet differential pressure transmitter. It utilizes the latest leading-edge technologies to measure pressure and offers unequaled performance, excellent stability and proven reliability. This model is designed to measure low to medium differential pressures under high line pressures (up to 200 bar).

The sensor integrates a single solid-state, piezoresistive MEMS silicon die which acts as the sensitive element and converts pressure into an electrical signal. Using advanced techniques of MEMS fabrication (like wet etching, anisotropic etching), a thin diaphragm is crafted inside the silicon die. The thickness of the diaphragm is individually adapted to each pressure range so as to get the highest possible sensitivity without breaking under full pressure load.

The sensor signal is digitized, compensated and processed by a powerful, low power 32-bit microcontroller. It is then converted back to an amplified analog signal. The digital electronics ensures precise calibration of all critical parameters and achieves very high precision, thermal stability and compensation of all repeatable errors. Each unit is fully tested, compensated and calibrated for pressure and temperature. Each transmitter is shipped with a traceable calibration card.

The electronic circuit is packaged in a hermetically-sealed, all-welded 316L stainless steel housing enabling the PN1M to be immersed in water or pressure washed without internal leakage. This design makes the PN1M ideal for pressure measurements that can involve wet, corrosive or sterile media in the most severe environments.


Physical characteristics
Pressure range 0 to 2 bar through 0 to 20 bar
Safe overpressure 2 x (positive side), 1.5 x (negative side)
Burst pressure 3 x (positive side), 2 x (negative side)
Line pressure 200 bar
Environmental characteristics
Storage temperature -40 to 125°C
Operating temperature extremes -40°C, 125°C
Maximum operating temperature span 140°C
Ambient temperature -40 to 80°C
Electrical characteristics (choose one circuit)
Power supply / excitation 8 - 32 VDC 13 - 32 VDC 8 - 32 VDC 8 - 32 VDC
Output signal 4 - 20 mA 0 - 10 VDC 0 - 5 VDC 0.5 - 4.5 VDC
Current draw 20 mA 5 mA 5 mA 4 mA
Response time 5 ms 5 ms 5 ms 5 ms
Mechanical characteristics
Electrical connections ✔ DIN 43650-A ✔ Amphenol C 091 A ✔ M12x1 ✔ PTIH-10-6P ✔ PE cable
Mechanical connections ✔ G 1/4" Int ✔ 1/4"-18NPT Int
Materials available 316L Stainless steel
Seal materials available FKM, EPDM, Silicone, NBR
Performance (depending on temperature compensation range)
Compensated temperature range -10 to 80°C
Linearity ±0.02%FS
Hysteresis ±0.005%FS
Repeatability ±0.005%FS
Line pressure drift ±0.005 %FS/bar
Zero offset ±2mV
Span offset ±0
Temperature drift of Zero ±0.01%FS/K
Temperature drift of Sensitivity ±0.03%/K
Stability (per annum) ±0.1%FS

All values are typical values.