Mercoid
Mercoid SA1111E-A4-K1 Pressure Switch 10-150 psi 1/4 FNPT SPDT
Pressure switch monitors 10 to 150 psi with 1/4 FNPT port, SPDT contacts rated 15 A at 125 V AC and NEMA 4X enclosure
- Reliable pressure monitoring from 10 to 150 psi
- SPDT contacts switch 15 A at 125 V, 250 V or 480 V AC
- NEMA 4X enclosure protects against wash-down and corrosion
- Diaphragm actuation with 4 to 7.5 psi differential for stable switching
- 1/4 inch FNPT port fits standard piping without adapters
Pressure Switch 10-150 psi
The Mercoid SA1111E-A4-K1 is a diaphragm-actuated pressure switch designed for monitoring fluid systems in industrial machinery. It provides a Standard action response with a differential range of 4 to 7.5 psi across a 10 to 150 psi operating span. The unit carries a NEMA 4X enclosure rating suitable for harsh environments.
Single 1/4 FNPT Port Integration
Installation requires a single 1/4 inch FNPT process connection to integrate into existing piping or vessel assemblies. The SPDT contact form delivers one normally open and one normally closed circuit, allowing flexible control logic without additional relays. This configuration simplifies wiring for alarm or pump control duties.
Sustained Load Contact Ratings
Under continuous operation the switch handles 15 A at 125 V AC, 15 A at 250 V AC and 15 A at 480 V AC. For direct current circuits the rating is 0.5 A at 125 V DC and 0.25 A at 250 V DC. These limits define the maximum switching capacity for prolonged duty cycles.
Highlights
- Reliable pressure monitoring from 10 to 150 psi
- SPDT contacts switch 15 A at 125 V, 250 V or 480 V AC
- NEMA 4X enclosure protects against wash-down and corrosion
- Diaphragm actuation with 4 to 7.5 psi differential for stable switching
- 1/4 inch FNPT port fits standard piping without adapters
Specifications
| Brand | MERCOID |
|---|
Questions about this item
What is the maximum pressure the SA1111E-A4-K1 can handle before the diaphragm reaches its limit?
The switch operates up to 150 psi, which is the upper end of its adjustable range.
How much heat does the switch generate when it cycles continuously at 15 A on a 250 V AC circuit?
The device is a passive diaphragm switch; it produces no measurable heat of its own during operation.
Which pipe fitting must already be on the system for the 1/4 in FNPT port to connect directly?
A matching 1/4 in MNPT male thread on the process piping is required for a direct seal.
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