Overview
The Barksdale E1H-H90 is a compact, mechanical Econ-O-Trol pressure switch designed for demanding industrial pressure control and monitoring applications. With a 3–90 PSI operating range and 1000 PSI occasional surge rating, this switch delivers accurate, repeatable pressure switching for pump and compressor monitoring, air proving in HVAC systems, and safety shutdown functions. The housed aluminum enclosure with Buna-N diaphragm and O-ring seals ensures reliability in harsh environments.
Key Features
- Operating pressure range of 3–90 PSI with 1000 PSI maximum surge capacity
- SPDT (single-pole, double-throw) circuit for flexible switching logic
- Snap-action micro-switch eliminates inconsistent floating contact operation
- Housed aluminum construction with Buna-N diaphragm and seals for corrosion resistance
- 1/4″ NPT female threaded port for standard hydraulic and pneumatic system connections
- NEMA 4 enclosure rating and IP65 protection; UL recognized and CSA listed
- Multi-voltage support: 120–240V at 10A continuous; 480V at 3A continuous
- Easy setpoint adjustment and long service life for cost-effective operation
Technical Specifications
- Operating Pressure Range: 3–90 PSI
- Maximum Surge Pressure: 1000 PSI occasional
- Voltage Rating: 120V / 240V / 480V AC
- Contact Rating (120–240V): 10A continuous
- Contact Rating (480V): 3A continuous
- Circuit Type: SPDT
- Connection: 1/4″ NPT female
- Enclosure Rating: NEMA 4, IP65
- Diaphragm Material: Buna-N
- Housing: Die-cast aluminum
- Certifications: UL recognized, CSA listed
- Series: E1H Econ-O-Trol
- Operator Type: Diaphragm
- Compatible Media: Air, gases, non-corrosive fluids
Typical Applications
- Pump and compressor discharge monitoring and protection
- Air proving in HVAC systems and gas control circuits
- Irrigation and water management system pressure control
- Engine and machine tool pressure monitoring
- Water and wastewater treatment facility process control
- High-limit and low-limit pressure control and safety shutdown
- Medical equipment pneumatic systems
- Pulp and paper mill process pressure applications
Compatibility & Replacements
Compatible With
- Industrial pneumatic and hydraulic systems with 1/4″ NPT ports
- HVAC air proving and pressure control circuits
- Pump and compressor motor control circuits (up to 10A at 120–240V or 3A at 480V)
- Safety interlocks and alarm functions in manufacturing equipment
- Irrigation and fluid delivery systems requiring pressure thresholds
Replaces / Drop-In Replacement For
- Earlier generation Barksdale mechanical pressure switches with identical 1/4″ NPT and 3–90 PSI specifications
- OEM equipment pressure switches rated for 3–90 PSI operation with standard NPT connections
- Verify compatibility with your system integrator before ordering to ensure electrical voltage and circuit requirements match your control panel.
Works With
- Industrial relay logic and hardwired control circuits
- Programmable logic controllers (PLCs) via digital input modules
- HVAC controls and building management systems (BMS)
- Motor starters and thermal overload protection relays
- Pneumatic logic systems and directional control valves
- Standard industrial wiring and automation infrastructure
