Posted in | Pressure Sensors

Keller UK’s Piezoresistive OEM Pressure Transmitter 4 LC to 9 LC Series

The Piezoresistive OEM Pressure Transmitters are capable of combining a piezoresistive pressure sensor with -40…150 °C-capable signal conditioning in a single package.

Chip-In-Oil (CIO) technology is used for completely embedding the pressure transmitter into a hermetically-sealed, oil-filled housing, and can also be seamlessly integrated into the OEM product, thus saving cost and ensuring better performance.

It comprises a ratiometric analog output which helps in simplifying the task of integrators by supplying a signal output, thus avoiding the need of incorporating an expensive, absolute reference. A 5 VDC supply provides 0.5…4.5 VDC output. This helps in protecting the LC-transmitter against overvoltage and reverse polarity up to ±33 VDC.

Key Features

The key features of the Piezoresistive OEM Pressure Transmitters are:

  • External electronics are not required for compensation or signal processing.
  • It has an operating temperature of about 150°C.
  • Ultra-compact, robust housing is manufactured from stainless steel.
  • It can be easily integrated into overall systems.
  • Hermetically protected sensor electronics.
  • Two-chip solution with pressure sensor and signal processing separation provides a high degree of flexibility.

Specifications

The specifications of the Piezoresistive OEM Pressure Transmitters are:

Type 3-wire
Accuracy max. +/- 0.25 %FS
Stability max. +/- 0.3 %FS
Overpressure 2.5 x pressure range, max. 300 bar resp. 1200 bar (6 LC HP, 7 LC HP)
Load resistance > 5 kO
Isolation > 100 MO at 500 VDC
Power consumption max. 8 mA
Sampling rate/Bandwidth 2 kHz/800 Hz
Rise time T99 1 ms
Oil filling Silicone oil
Reverse polarity and overvoltage protection ± 33 VDC (permanently on all leads)
Supply 5.0 VDC ± 0.5 V
Response time (Supply ON) <5 ms (0…99%)

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