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Series 7L OEM Pressure Transducers

Description

The series 7L is a new generation of OEM pressure transducers from Keller that feature a smaller 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 7L 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, Galden HT270 oil is available for low pressure Oxygen applications, Fomblin M100 for Oxygen applications to 330 Bar.

Features

  • High long-term stability
  • Robust housings made from Stainless Steel, Hastelloy or Titanium
  • 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

Diagram

Customer Specific Options

  • Custom Pressure Ranges
  • Custom Temperature Ranges between -40 and +125°C
  • Custom Mathematical Modelling
  • Electrical Connection with Silicone Wires
  • Housing and diaphragm made of Hastelloy C-276 or Titanium
  • O-Rings made of Other Materials
  • Other Oil Filling type for Pressure Transducers: eg. Special Oils for Oxygen Applications.
  • Modifications to Customer Specific Applications