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The Haskel 51940-1 Air Pilot Switch is a precision pneumatic pressure switch designed to emit a control air signal upon reaching a preset pressure. Built for tough high-pressure systems, it offers reliable performance with both normally-open and normally-closed contact options. Constructed with stainless steel and rated up to 10,000 psi, its ideal for controlling gas boosters, fluid pumps, and air amplifiers in industrial environments. Adjustable and durable, it consistently handles pressure safety and automation tasks with precision.
- Switches a pneumatic signal (up to 150 psi) in response to pressure changes
- Adjustable setpoints NO: 2,000 10,000 psi / NC: 3,500 10,000 psi
- Rated for pressures up to 10,000 psi for demanding applications
- Durable stainless-steel construction ensures long-term performance
- Compact, easy-to-install design with standard 1/4" and 1/8" NPT ports
| Model / Part No. | 51940-1 |
| Switch Type | Air pilot pressure switch |
| Setpoint Ranges | Normally Open (NO): 2,000 10,000 psi; Normally Closed (NC): 3,500 10,000 psi |
| Output Signal | Up to 150 psi pneumatic |
| Max Operating Pressure | 10,000 psi |
| Porting | Sensing Port: 1/4" NPT; Pilot Output Port: 1/8" NPT |
| Material | Stainless steel housing |
| Weight | Approximately 1.7 lb (0.77 kg) |