Overview
The Barksdale D2H-H18 is a housed diaphragm pressure switch designed to control pressure or vacuum conditions in pneumatic and hydraulic systems. With an adjustable range of 0.4–18 PSI (0.028–1.24 BAR), this switch offers precise, reliable actuation for critical control applications across manufacturing, automation, and process control environments.
Key Features
- Adjustable pressure or vacuum range: 0.4–18 PSI
- Multi-voltage operation: 125/250/480 VAC
- Dual setpoint configuration with SPDT contact arrangement
- Proof pressure rating: 60 PSI (4.14 BAR)
- Compact housed design with standard 1/4″ NPT female port
- Diaphragm design ensures responsive, accurate switching
Technical Specifications
- Adjustable Range: 0.4–18 PSI (0.028–1.24 BAR)
- Proof Pressure: 60 PSI (4.14 BAR)
- Electrical Rating: 10 A @ 125 V AC, 10 A @ 250 V AC, 3 A @ 480 V AC
- Contact Configuration: SPDT (Single Pole, Double Throw)
- Connection: 1/4″ NPT female
- Weight: 1.92 lbs
- Material: Housed (standard configuration)
- Series: D2H (Dual Setpoint Housed)
Typical Applications
- Pneumatic system pressure monitoring and control
- Hydraulic pump discharge pressure protection
- Vacuum or low-pressure process control
- Industrial automation and machinery startup/shutdown logic
- Air/gas compressor tank pressure regulation
- HVAC and fluid delivery system safeguards
Compatibility & Replacements
Compatible With
- Pneumatic and hydraulic control circuits (125, 250, 480 VAC rated)
- Pilot-operated pressure relief valve feedback systems
- Industrial PLC and relay-based control panels
- Flow control and pump unload logic
- Vacuum pump protection circuits
Replaces / Drop-In Replacement For
- Barksdale D2H series (0.4–18 PSI variants)
- Verify exact pressure range and electrical specifications before substitution; some D2H variants differ in voltage/amperage ratings
Works With
- Direct integration with 125, 250, and 480 VAC control circuits
- Compatible with relay logic, PLC digital inputs, and motor contactor circuits
- Standard 1/4″ NPT port compatible with most pneumatic/hydraulic manifolds and tubing
- SPDT dry contact output operates independently of external power
