Pressure transmitter selection
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There is currently anhydrous hydrogen fluoride at 180°C, with pressure measurements ranging from -20 KPa to 20 KPa. Accurate measurements over long periods are required; how should a pressure transmitter be selected? Please, dear experts, give some recommendations!
A pressure transmitter for pressures ranging from 0 to 100 KPa (measurement range: -100 KPa to 100 KPa). However, the material used needs to be carefully selected – should a special alloy or PFA material be used?
Consider diaphragms coated with Hastelloy, PTFE, ECTFE, etc.
This post was last edited by Qiushui Han Guang on 2026-3-25 08:53. HC or Monel diaphragms are recommended; our company also produces anhydrous hydrogen fluoride, but at room temperature only, not at such high temperatures as yours. This solution has been in use for 10 years
You can contact Rosemount and EJA to ask about those made of Hastelloy B and pure zirconium, or use special pressure transmitters to transfer the fluid for cooling before using HC
In this operating condition, I’m afraid there’s no component that can be used for a long time; if it breaks, just replace it
Diaphragm pressure transmitters with a Hastelloy C-276 base and a special polymer coating; a PTA film is applied to the outer surface of the diaphragm, and this PTA film must be regularly maintained and replaced