Overview
The Ashcroft B424B pressure switch is a rugged, field-adjustable industrial control device built for virtually all OEM and industrial applications. The B4 pressure switch is designed for use in virtually all industrial and OEM applications. Providing reliability and long-cycle life, it is ideal for satisfying requirements for pressure control, shutdown or alarm operations. With setpoints adjustable from 200 to 1000 psi, this snap-action switch delivers consistent switching performance across diverse process control scenarios.
Key Features
- NEMA 4X stainless steel enclosure provides corrosion resistance and washdown protection
- Adjustable setpoint (field-tunable within range) for precise system control
- Snap-action switching mechanism ensures positive, repeatable operation
- Extended cycle life for demanding industrial environments
- Optional factory preset configurations (XFS) available with ±1% accuracy
- Electrical rating: 15A at 125/250/480 VAC; ½A at 125 VDC
Technical Specifications
- Series: B-Series (B4) Pressure Switch
- Pressure Range: 200–1000 psi nominal (field-adjustable)
- Enclosure Type: NEMA 4X, stainless steel, watertight
- Electrical Output: Snap-action SPDT (single-pole double-throw) contacts
- Electrical Rating: 15A @ 125/250/480 VAC; ½A @ 125 VDC
- Setpoint Accuracy: ±1% of nominal range (factory preset option)
- Connection: Standard ¼” NPT pressure port
- Operating Temperature: Consult datasheet for fluid/media compatibility limits
- Certifications: UL listed, IP66 rated
Typical Applications
- Hydraulic and pneumatic system pressure monitoring and control
- Pump shutdown and alarm interlocks in industrial hydraulics
- Compressor pressure cutout and relief control
- Water system pressure protection and switchover
- General industrial pressure sensing and process control
- OEM equipment integration and pressure-based safety logic
Compatibility & Replacements
Compatible With
- Standard ¼” NPT threaded pressure ports (ISO 228-1)
- Industrial AC/DC electrical control circuits rated for 15A @ 125/250/480 VAC or ½A @ 125 VDC
- Pneumatic and hydraulic systems across automotive, manufacturing, and utilities sectors
- NEMA 4X watertight installations (indoor/outdoor washdown environments)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Ashcroft B424B serves as a direct replacement for other B-series pressure switches of equivalent range and electrical rating. Consult Ashcroft’s cross-reference documentation or your equipment manual to confirm exact model interchangeability.
Works With
- Standard industrial PLC and relay logic control systems
- Hydraulic pump and motor control circuits
- Pneumatic actuator and valve switching circuits
- Safety interlocks and emergency shutdown systems
- Any system requiring NEMA 4X-rated pressure-actuated switching
