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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
  • Temperature range -20 to +100°C (Compensated -10 to +80°C)
  • Standard housings made from Stainless Steel
  • Front-flush, crevice-free welded diaphragm
  • Optimised thermal behaviour

Specifications

Pressure Range Proof Pressure Sensitivity (mV/(mA x Bar)
PR PAA PA Min Typical Max
0 to 5 Bar 0 to 5 BarA 0 to 5 Bar 15 Bar 24 32 40
0 to 10 Bar 0 to 10 BarA 0 to 10 Bar 30 Bar 12 16 20
0 to 20 Bar 0 to 20 BarA 0 to 20 Bar 60 Bar 6.0 8.0 10
0 to 30 Bar 0 to 30 BarA 0 to 30 Bar 90 Bar 4.0 5.3 6.7
0 to 50 Bar 0 to 50 BarA 0 to 50 Bar 150 Bar 2.4 3.2 4.0
N/A 0 to 100 BarA 0 to 100 Bar 300 Bar 1.2 1.6 2.0
N/A 0 to 160 BarA 0 to 160 Bar 300 Bar 0.75 1.0 1.25
N/A 0 to 200 BarA 0 to 200 Bar 300 Bar 0.75 1.0 1.25
Reference Pressure
at Ambient Pressure		 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 -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