
Honeywell
L404F1391/U Precision Pressure Switch for Large‑Scale Systems
Precision Pressure Switch for Large‑Scale Systems
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Precision Pressure Switch |
| Pressure Range | 5 to 70 psi |
| Differential | Adjustable |
| Switch Action | SPDT snap-acting switch |
| Sensor | Stainless steel diaphragm |
| Connection | 1/4 inch NPT internal thread |
| Operating Temperature | -35°F to 150°F |
| Application | Industrial pressure monitoring |
Notes
Product Overview
The L404F1391/U is a precision pressure switch developed for applications requiring accurate pressure detection and control in large-scale systems. It provides repeatable switching performance and adjustable differential response for steam, air, and fluid pressure systems.
It is ideal for industrial plants, boiler houses, and HVAC systems where stable and reliable pressure monitoring is critical.
Key Features
- Precision pressure control
- Adjustable differential for fine tuning
- SPDT snap-acting switch
- Stainless steel diaphragm for durability
- Standard mounting connection
- Suitable for large-scale industrial systems
Packaging & Delivery
- Industrial protective packaging
- Export shipping ready
- Standard freight and express options
- Bulk orders available
Frequently Asked Questions (FAQ)
Q: What is this pressure switch used for?
A: Accurate monitoring and switching in large-scale industrial pressure systems.
Q: Can the differential be adjusted?
A: Yes, it features adjustable differential.

