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The 51940-3 Air Pilot Switch is an externally adjusted pneumatic pressure switch designed for Haskel pumps, boosters, and air amplifiers. It senses pressures up to 10,000 psig and outputs a 150 psi pneumatic signal when preset pressures are reached. Featuring a durable poppet valve design (Style A), it s available in normally-open and normally-closed versions with setpoints spanning 200 950 psig (NO) and 500 1300 psig (NC). Housing is stainless steel with NPT ports, suitable across gas and liquid applications. Ideal for automating pressure control, system protection, or pneumatic signaling.
- Adjustable sensing range: 200 950 psig NO, 500 1300 psig NC
- Maximum sensing capacity: 10,000 psig
- Pneumatic output up to 150 psig
- Stainless steel construction with " & " NPT ports
- Poppet-style air valve ensures reliable sealing and switching
- Ideal for air-driven systems needing pneumatic logic control
| Part No. | 51940-3 |
| Style | A (externally-adjusted, 2-position poppet) |
| Max Sensing Pressure | 10,000 psig |
| Port Sizes | " NPT (sense), " NPT (air output) |
| Output Signal | Pneumatic, up to 150 psig |
| Dimensions | ~8" length 2" diameter |
| Weight | ~1.67 lb (0.76 kg) |
| Materials | Stainless steel, aluminum valve body, PTFE/Buna seals |