New Explosion-Proof Differential Pressure Switches Meet Global Standards


Mid-West Instrument, a 30 year leader in explosion-proof, differential pressure gauge and switch design announces the firm’s new line of 220 / 240 Explosion proof, differential indicating switches. These extremely light-weight and ruggedly compact family of indicating switches set a new standard of excellence in Explosion- Proof design.

The new 220 / 240 differential indicating switches are CSA, UL and ATEX certified.. As a condition of continuing certification, Mid-West Instrument is subject to un-announced audits by all certifying bodies. This applies to the entire assembly as mandated by the applicable hazardous locations standards.

Benefits of the 220 / 240 Indicating Switches:
· Compact, Lightweight Aluminum (or 316/316L )
· Weather resistant, 4 ½” gauge front
· ATEX Ex d IIB+H2 ExII 2GD IP65 classification
· CSA Certified & UL Listed: Class I,
Division I Groups B, C, & D, classification
· ½” FNPT Cable or conduit entry
· Over range protection & 5 year warranty
Model 220-Piston Style
· Working pressure to 4000 PSI (275bar)
· Ranges from 0-5 PSID to 0-100 PSID (0-0.35 bar to 0-7.0 bar)
Model 240-Diaphragm Style
· Total separation between high & low side
· 1500 PSI (103 bar) working pressure
· Ranges from 0-20”H20 to 0-100 PSID (0-50 mbar to 0-7bar)


• Accuracy: 2%* • Dial Size: 4 1/2”, None (Switch Only)
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