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 High Temperature Application Configurations for Pressure Gauges 
Guideline 
 
The recommended maximum process temperatures for pressure gauges is 60ºC for brass wetted parts and 100ºC for stainless steel wetted parts. For processes in which the process reaches temperatures above 100ºC several accessories are available to prevent damage to the instrument and maintain the instrument performance and accuracy.
 
Below are recommended gauge configurations for specific process temperature ranges. Note that the maximum ambient temperature is 60ºC and should not be exceeded. These temperature reduction methods are general recommendations and many conditions such ambient temperature, media type and process configuration may affect the amount of temperature reduction.
 
• Up to 60ºC - All pressure gauges may be used.
 
• Up to 100ºC - A gauge with stainless steel wetted parts must be used.
 
• Up to 150ºC (approx) - A gauge fitted with diaphragm seal or cooling tower must be used
 
• Up to 250ºC (approx) - Diaphragm Seal and Cooling Tower
At this temperature a diaphragm seal combined with a 100mm cooling tower is recommended on a stainless steel gauge. A high temperature system fill fluid is required.
 
• Up to 400ºC (approx) - Diaphragm Seal and Armoured Capillary
At this temperature a high temperature diaphragm seal with 2 metres of armoured capillary is recommended on a stainless steel gauge. A high temperature system fill fluid is required.
  
 
                                         Up to 150 ºC                                   Up to 250 ºC                           Up to 400 ºC