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Small brass pressure switch with 1/4 inch SAE port and electrical terminals

SUPCO

SUPCO SLP1535 Press Switch 15-35 PSIG

SKU CH-EM94-2JVX6

Low-pressure safety switch opens at 15 PSI and closes at 35 PSI with a ±5 PSI differential

  • Opens at 15 psi to protect system
  • Closes at 35 psi for reliable restart
  • SPST switch action simplifies wiring
  • 1/4 in female SAE connection fits standard lines
  • Rated up to 650 psi for durable service

Low-pressure safety switch for refrigeration

The SUPCO SLP1535 is a single-pole single-throw switch that opens on falling pressure to protect compressors in air-conditioning and refrigeration systems. It is intended for technicians and installers who need a reliable low-pressure cut-out device.

Opens at 15 psi and closes at 35 psi

The decisive specification is the operating range: the contacts open when pressure drops to 15 psi and automatically reset when pressure rises to 35 psi, with a ±5 psi differential. The switch is rated for systems up to 650 psi and connects via a 1/4-inch female SAE flare fitting.

Direct-mount installation with 1/4-inch SAE port

The switch threads directly onto a 1/4-inch female SAE pressure port, so no capillary tube or additional fittings are required. This direct-mount design saves space in tight service panels and reduces potential leak points. It suits new equipment builds and replacement jobs where a compact, field-adjustable low-pressure control is specified.

How it compares

Measured against everything we stock in Push-Button & Disconnect Switches, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 70% of the 194 comparable items (median $19.49).

Specifications

Product
Brand nameSUPCO

Questions about this item

What does the 15–35 PSIG range actually do once the switch is installed in a system?

The switch opens when pressure drops to 15 psi and closes again when pressure rises to 35 psi, protecting equipment from low-pressure conditions.

How does the 1/4 in Female SAE pressure connection limit what I can hook up to it?

The 1/4 in Female SAE port accepts matching male SAE flare fittings, so only tubing or hoses with that thread type will seal directly without adapters.

What physical clearance and mounting method does the SLP1535 need to fit in my panel?

The switch mounts directly through its 1/4 in Female SAE pressure port, requiring a matching threaded boss or bulkhead fitting in the panel for secure installation.

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