Ashcroft
Ashcroft B424 pressure switch 1.5-5.0 psi 10-100 psi
Monitors pressure from 10 to 100 psi with a 1.5 to 5.0 psi differential and SPDT contacts rated 15 A at 125, 250 and 480 V AC
- Adjustable differential from 1.5 to 5.0 psi for precise control
- Wide operating range of 10 to 100 psi covers diverse applications
- SPDT contact form enables versatile circuit switching
- NEMA 13, 3, 4, 4X ratings suit harsh environments
- AC ratings of 15 A at 125, 250 and 480 V handle heavy loads
Ashcroft B424 pressure switch 1.5-5.0 psi
The Ashcroft B424 pressure switch monitors system pressure from 10 to 100 psi with an adjustable differential of 1.5 to 5.0 psi. It uses a diaphragm actuation mechanism and provides SPDT contact action for control circuits. Factory on/off settings are configured at 90 percent of the selected range. The switch carries NEMA 3, 4, 4X and 13 enclosure ratings for demanding environments.
1/4 in FNPT port limits
A single 1/4 inch FNPT port connects the switch to the process media, restricting use to piping or fittings with matching threads. The diaphragm actuation requires compatible fluid types and clean media to maintain reliable operation. NEMA ratings protect the enclosure from water, dust and corrosion but do not extend to the port connection itself. Installation must account for the single-port design when planning pressure sensing points.
SPDT contact rating decides fit
The switch contacts carry 15 A at 125 V AC, 15 A at 250 V AC and 15 A at 480 V AC for alternating current loads. Direct current ratings are 0.25 A at 125 V, 0.5 A at 120 V and 6 A at 30 V. These electrical limits determine whether the switch can directly control a given motor starter, relay or alarm circuit without an intermediate contactor. Builders needing higher DC current capacity must add a separate relay.
Highlights
- Adjustable differential from 1.5 to 5.0 psi for precise control
- Wide operating range of 10 to 100 psi covers diverse applications
- SPDT contact form enables versatile circuit switching
- NEMA 13, 3, 4, 4X ratings suit harsh environments
- AC ratings of 15 A at 125, 250 and 480 V handle heavy loads
Specifications
| Brand | ASHCROFT |
|---|
Questions about this item
Should I choose a switch with a 1.5 to 5.0 psi differential or a wider range for my application?
The differential of 1.5 to 5.0 psi means the switch resets 1.5 to 5.0 psi below the set point; select this when you need tight control near the 10 to 100 psi operating range.
What does the 10 to 100 psi range mean once the switch is installed on my equipment?
You can set the actuation point anywhere between 10 and 100 psi; the factory preset sits at 90 percent of range, so it will trip near 90 psi unless you adjust it.
What does the NEMA 13, 3, 4, 4X rating cap in practice for this pressure switch?
The enclosure resists dust, water spray, hose-directed water and corrosion, so the switch can be mounted in wash-down or outdoor environments without extra protection.
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