Line of 220/240 explosion-proof, differential indicating switches are lightweight, compact, and CSA, UL, and ATEX certified. Model 220 piston style operates in pressures to 4000 psi and ranges from 0-5 and 0-100 psid. Model 240 diaphragm style offers total separation between high and low side and 1500 psi working pressure. It ranges from 0-20 H2O to 0-100 psid.

Mid-West Instrument,