Engineering guides

Short, practical answers to the questions consultants, contractors and plant engineers ask us about gauges. New guides are added regularly.

• How to select a pressure gauge
  A practical checklist for specifying pressure gauges: range (the 50/75% rule), dial size, SS 316 wetted parts, liquid filling, siphons, connections and standards.
• Glycerine filled vs dry pressure gauge
  When to specify a glycerine or silicone filled pressure gauge instead of a dry gauge: pulsation, vibration, outdoor use, cold climates and oxygen service.
• IS 3624 and EN 837-1: pressure gauge standards
  What IS 3624 and EN 837-1 cover for Bourdon tube pressure gauges, how accuracy classes compare, and what to write in a specification for India and export projects.
• How to select a temperature gauge and thermowell
  Choosing a bimetallic temperature gauge: range, dial size, mounting (bottom, back, every-angle), stem length, and barstock vs fabricated thermowells.