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High temperature linear position sensors from Bestech Australia

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article image HT750 series linear variable differential transformers
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The Macrosensors HT750 series of AC linear variable differential transformers (LVDTs), available from Bestech Australia , are high temperature contactless linear position sensors for both OEM applications and end user requirements.

The uses for these linear variable differential transformers are wide ranging, however the main applications include:

  • high temperature displacement testing
  • steam valve position feedback; and
  • nuclear testing.
These sensors measure 19mm in diameter and are available in measuring ranges of between ±1.25mm and ±250mm. The HT750 series features the high resolution, excellent repeatability and low hysteresis associated with linear variable differential transformer technology, as well as high temperature operation up to 220°C. Non-linearity is within ±0.25% of the full range output.

Constructed from glass-filled polymer coil forms for thermal stability, and stainless steel housings taht act as magnetic shields to reduce the effects of any external AC magnetic fields, these linear variable differential transformers have a high temperature tolerance and are environmentally robust.

There are several standard options for customisation available for the HT750 linear variable differential transformers. These include Teflon bore liners, metric threaded cores, and smaller diameter cores for greater core-to-bore clearance and/or lower core mass.

Key features of these linear variable differential transformers include:

  • high temperature Teflon leads
  • 220°C operating temperature
  • coil assembly sealed to IP-61
  • high resolution, excellent repeatability.
All HT750 linear variable differential transformers are able to operate properly with any conventional differential input linear variable differential transformer signal conditioners, which are also available from Bestech Australia.

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