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Series 7LHP OEM High Pressure Transducers

Description

The series 7LHP is a piezoresistive OEM high pressure transducers from Keller that feature a 15mm diameter capsule with a crevice-free laser welded diaphragm. Each cell undergoes extensive automated testing and is supplied with calibration data, which includes sensitivity, linearity, initial zero offset and thermal effects over the compensated temperature range.

The Series 7LHP OEM cells feature floating O-ring mounting to avoid errors caused by mechanical stress that ensures performance within the specifications. The housing encases the piezoresistive silicon pressure sensor and a small quantity of oil that efficiently transfers the pressure exerted on the diaphragm to the silicon pressure sensor. Standard cells include Silicone oil AK100, but other oils can be use for specific applications. For example, Olive Oil for food applications, Fomblin M100 for Oxygen applications to 330 Bar.

Features

  • High long-term stability
  • Temperature range -40 to +150°C (Compensated -10 to +80°C)
  • Standard housings made from Stainless Steel
  • Front-flush, crevice-free welded diaphragm
  • Optimised thermal behaviour

Specifications

Pressure Range Burst Pressure Sensitivity (mV/(mA x Bar)
PA PAA Min Typical Max
0 to 100 Bar 250 Bar 1.20 1.60 2.00
0 to 160 Bar 400 Bar 0.75 1.00 1.25
0 to 250 Bar 625 Bar 0.48 0.64 0.80
0 to 400 Bar 1,000 Bar 0.30 0.40 0.50
0 to 600 Bar 1,500 Bar 0.20 0.267 0.333
0 to 1,000 Bar 2,200 Bar 0.12 0.16 0.20
0 to 1,600 Bar 2,200 Bar 0.075 0.10 0.125
0 to 2,000 Bar 2,200 Bar 0.075 0.10 0.125
Reference Pressure
at 0 Bar Abs (Vacuum)		 Reference Pressure
at 1 Bar Abs		 Based on
Reference Pressure		 mV/(mA x Bar)

Diagram

Customer Specific Options (Contact for Pricing)

  • Custom Pressure Ranges
  • Custom Temperature Ranges between -55 and +180°C
  • Custom Mathematical Modelling
  • Electrical Connection with Silicone Wires
  • O-Rings made of Other Materials
  • Other Oil Filling type for Pressure Transducers: eg. Special Oils for food or Oxygen Applications.
  • Modifications to Customer Specific Applications