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The Ashcroft® A-Series miniature pressure switches are designed for tough applications where conventional designs often don't measure up. A rugged 316 SS enclosure gives uncompromising protection. Materials of construction have been selected for long life. Precision snap acting micro switches are featured and fully encased to prevent moisture from corroding switch contacts. The switch, depending on range, is either an all welded 316 stainless steel diaphragm sealed piston design or a direct acting piston design sealed with a Buna-N or Viton O-ring. Ideal for pressure alarm, shutdown, or control in hazardous areas and wherever size is a consideration or equipment is being downsized.
Setpoint: Factory set or field adjustable
Setpoint
repeatability: ±2% of range
(Additional setpoint shift of ±2% of range per
40°F from initial setpoint set at 70°F typical)
Vibration: Passed MIL-STD-202G
Shock: 75G’s 10 milliseconds 3 axis
Piston: Stainless steel with Viton or Buna-N O-ring
Mechanical
life piston
design: >1,000,000 operations typical
Diaphragm: 316L SS
Mechanical
life diaphragm
design: >400,000 operations typical
Enclosure
material: 316L SS
Enclosure
rating: NEMA 4X, 7, 9, IP 67
Pressure
connection: 1⁄8 NPTF, 1⁄4 NPTF, 1⁄4 NPTM, 1⁄8 NPTM, 7/16-20 SAE
M, VCR, VCO, 3⁄4 Tri-Clamp®, 1.5 Tri-Clover®,
2.0 Tri-Clover® , G1⁄4 B, G1⁄4 A Type E Stub end
Electrical
output: SPDT, or DPDT 5A or 3A 120Vac, 2A @ 30 Vdc,
5A @ 28 Vac, gold contacts available
Electrical
termination: 18 AWG wire leads, with 1⁄2 NPT conduit connection.
Dimensions
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Oil and gas industry
Chemical and petrochemical plants
Other special machinery and equipment applications
