Pressure type
Protection level
for hydraulic applications
Other characteristics
Pressure range

Min.: 0 psi

Max.: 10,000 psi

Burst pressure

4,500 psi, 10,000 psi, 15,000 psi

Process temperature

Min.: -40 °C (-40 °F)

Max.: 149 °C (300 °F)


Versatile Nega-Rate® Belleville disc spring pressure switch for a wide range of applications. Series 201P (piston sensor) for hydraulic applications up to 10000 psig system pressure. Externally adjustable for convenient set point changes. Specifications Electrical: Snap action electrical switch recognized by Underwriters’ Laboratories, Inc. and CSA International Electrical Connection: 1/2 NPT female conduit connection with terminal block Pressure Connection: Wetted Material 1 1/4 NPT Female *Temperature limits change with O-Ring selection Adjustment: External screwdriver slot adjustment and range scale Shipping Weight: Approximately 3 pounds Electrical Form C 15 amp at 125 or 250 VAC; 1/8 hp at 125 VAC; 1/4 hp at 250 VAC; .5 amp résistive, .04 amp inductive 125 VDC Z 15 amp at 125 or 250 VAC; 1/4 hp at 125 VAC; 1/2 hp at 250 VAC; 1 amp résistive, .5 amp inductive 125 VDC Enclosure 3 Meets or exceeds the requirements of NEMA Type 3, 3R, 3S, 4, 4X and 13 Miscellaneous A Epoxy paint exterior — extra protection for severe environments BViton O-Ring CEPR O-Ring D SIL approval and marking, per IEC61508 (includes FMEA report) E 7/16"-20 SAE port K Extemal adjustment knob L Néon indicator light — 115 VAC M Gold electrical contacts for extremely low current applications P 5-Pin Brad Harrison connector (Reduce AC electrical rating to 8 amps) X CSA Certified with CE Mark (Not available with L or P option)