Legris
Legris 7808 04 18 Pneumatic Threshold Sensor 3/8 in 5/32 in 116 psi
Pneumatic threshold sensor with 3/8 inch NPT female inlet and 5/32 inch tube connector, operating between 43.5 and 116 psi
- TypeDrain Components
- MaterialHAWA
- Reliable pneumatic sensing with 116 psi maximum pressure
- Secure 3/8 inch NPT female inlet connection
- Flexible 5/32 inch tube air connector fitting
- Durable polymer body with NBR seals for longevity
- Operates from 5 to 140 degrees Fahrenheit range
Pneumatic Threshold Sensor 3/8 in 5/32 in
This sensor monitors air pressure in pneumatic systems and triggers at a defined threshold. It suits automation engineers and maintenance technicians who need reliable pressure detection. The polymer body and NBR seals handle compressed air in industrial environments. It is not for buyers who need liquid-level sensing or hydraulic pressure monitoring.
Installation and common issues
The unit has a female NPT inlet of 3/8 in and a tube connector for 5/32 in tubing, allowing direct plumbing into existing air lines. Thread sealant must be compatible with polymer bodies to avoid cracking. Over-tightening the NPT connection is a frequent cause of leaks or body damage. The sensor is not for installers who cannot verify thread compatibility or torque limits.
Practical limits of the pressure interface
Maximum operating pressure is 116 psi with a minimum of 43.5 psig, so the device only functions within that window. Operating temperature range spans 5 Degrees F to 140 Degrees F, limiting use in extreme cold or high-heat zones. The fixed threshold means it cannot be adjusted for different trip points. It is not for systems that require variable set-points or pressures outside the stated range.
Highlights
- Reliable pneumatic sensing with 116 psi maximum pressure
- Secure 3/8 inch NPT female inlet connection
- Flexible 5/32 inch tube air connector fitting
- Durable polymer body with NBR seals for longevity
- Operates from 5 to 140 degrees Fahrenheit range
Specifications
| Type | Drain Components |
|---|---|
| Material | HAWA |
| Brand | Legris |
| Model | 7808 04 18 |
Questions about this item
How do I verify the sensor is operating correctly after installation?
Apply compressed air at or above 43.5 psig and confirm the output switches at the 3/8 in NPT inlet; the polymer body and NBR seals are rated to 116 psi and 140 °F max.
What comes in the box and what must be sourced separately?
The sensor body with 3/8 in female NPT inlet and 5/32 in tube connector is supplied; 5/32 in tubing, fittings and a regulated air supply are not included.
Which port sizes should I select for my air line and control circuit?
Choose the 3/8 in NPT female inlet for the main air line and the 5/32 in tube connector for the pilot circuit; both are fixed on the 7808 04 18 model.
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