These ASCO switches incorporate a diaphragm-piston type pressure sensor or vapor-filled temperature sensor transducer with a fully adjustable electrical switch unit. The modules are mix 'n match, and can be field or factory assembled into more than 20,000 pressure or temperature switch variations right off the shelf. Pressure ranges are from vacuum to 8,000 psig (560 bar); temperature ranges are from -30° F (-22° C) to 640° F (338° C).

Constructions include:

• Fixed deadband models
• Adjustable deadband models with independent set and reset points over the complete operating range
• Differential pressure controls
• Two stage types with two electrical switches adjustable over the complete operating range
• Manual reset types
• Vacuum types
• Temperature switches with direct mount or capillary and bulb sensing elements of copper or stainless steel.

H Series and J Series Pressure Switches
These low cost, miniature pressure switches deliver big performances in small packages. The factory-set J Series is sealed with specially compounded epoxy that maintains sealing integrity in harsh environments. They're vibration resistant up to 10 Gs. H Series switches have field adjustable set points and fixed deadbands. Their low cost makes them ideal for OEM applications. Available open frame or with general purpose, watertight or explosionproof enclosures.

P Series Compact Pressure & Temperature Switches
These compact switches are most popular with original equipment manufacturers. They feature ASCO's patented alternating fulcrum balance plate to control the operation of one or more electrical snap action switches. Fixed or adjustable deadband. They are available open frame or enclosed in epoxy painted, zinc-coated steel or stainless steel. The design allows for purchasing of complete two-piece constructions or separate switch and transducer units. UL and NEMA approved.

S Series Industrial Pressure & Temperature Switches
These rugged switches are designed for tough industrial applications. The general purpose and watertight units have aluminum, die cast bodies with formed aluminum covers to protect the electrical connections. The explosionproof enclosures have die cast aluminum bodies and covers.

These switches are available in a variety of constructions. The design allows for purchasing of complete two-piece constructions or separate switch and transducer units. Pressure switches are available for combustion service with UL and FM approval.

Click here to download the complete ASCO Tripoint Switch catalog.