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Originally developed for demanding industrial compressor applications, the AD179 carries a working pressure rating of 3,000 psi. Manufactured from 321 stainless steel, this variant of the SnapStat product line has a 3.5" probe and 1/2-14 NPT mounting thread. SPST and SPDT available, 0-350F calibration range.

CPI's SnapStat thermal switches have a bimetal snap disc that actuates a miniature microswitch. This double snap action makes these switches virtually immune to shock and vibration. Epoxy sealing or glass to metal hermetic sealing makes them ideal for demanding industrial or military applications.

Calibration temp(factory set): 0°F Min. to 350°F Max. (Specify close on rise or close on fall).

Safe momentary undershoot/overshoot: -65°F to +400°F

Tolerance: ± 7°F (tighter tolerances available)

Repeatability: ± 3°F under standardized conditions

Actuation/Deactuation differential: 10°F to 25°F (non-adjustable)

Electrical Action: SPDT (standard), or SPST (specify NO or NC)

Electrical Rating:
Standard
28 VDC /120 VAC - 5 amp resistive, 3 amp inductive
220 VAC - 5 amp resistive

Gold contacts (for special applications, such as dry circuit or long periods of inactivity) - 28 VDC / 120 VAC, 1 amp resistive.

Endurance: 50,000 electromechanical cycles per standard electrical rating

Electrical Terminations: Leads are insulated from mounting, 20 AWG stranded, Teflon insulation. Special glass seal connections available.

Weight: 0.6 oz to 2.3 oz.

Response time per MIL s 24236 P4.7.5.1: From 15 secs. to 40 secs. (varies with thermal mass of switch body).

CPI SnapStat thermal switches offer a broad array of mounting, probe, and termination options for a diverse roster of industrial applications including over-temperature on air compressors, food extruders, distilling machines, escalators, and elevators.

CPI SnapStats are specified where reliability is critical. Applications include aircraft fuel systems, environmental control systems, medical equipment such as lasers, incubators, sophisticated electronic equipment including complex communication systems and fuel cells