Product details
Weiss Liquid Filled Gauge | LF401 | 4″ Dial | 0-100 PSI/KPA
Product Description
The LF401 is part of the premium Weiss LF series, specifically designed to eliminate “needle flutter” and internal wear caused by mechanical vibration. The gauge is Glycerin Filled, which acts as a permanent lubricant and dampener for the internal movement. This feature is essential for booster pump sets and HVAC machinery in Dubai and Abu Dhabi that operate under constant pulsation.
This model features a high-visibility 4-inch (100 mm) dial with a dual-scale range of 0-100 PSI (0-700 KPA). The “1” in the LF401 designation identifies it as a Lower (Bottom) Mount configuration. Encased in polished 304 Stainless Steel with a crimped bezel, the gauge is hermetically sealed to prevent internal fogging and protect against the humid, saline air common in Middle Eastern coastal regions.
Key Features
- Vibration Dampening: Glycerin filling stabilizes the pointer and protects internal gears from premature fatigue in high-vibration applications.
- Large 4″ Industrial Dial: Provides superior resolution and is much easier to read from a distance compared to compact 2.5″ utility gauges.
- 304 Stainless Steel Durability: Offers exceptional resistance to rust and environmental degradation in UAE plant room environments.
- Dual Scale Readout: Simultaneously displays pressure in PSI and KPA, satisfying international engineering and safety specifications.
- Precision Internals: Built with a high-grade copper alloy/brass movement for consistent and accurate performance with non-corrosive media.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | LF401 |
| Dial Size | 4″ (100 mm) |
| Range | 0 – 100 PSI / 0 – 700 KPA |
| Filling | Glycerin (Standard) |
| Connection Location | Lower Mount (Bottom) |
| Connection Size | 1/4″ NPT |
| Case Material | 304 Stainless Steel |
| Internal Material | Copper Alloy / Brass |
| Accuracy | $\pm$
1.0% of Span (ASME B40.100 Grade 1A) |
Frequently Asked Questions
- Q: Can this gauge be used for domestic water systems?
- A: Yes, the 100 PSI range is perfect for residential booster sets, and the liquid filling handles the vibration from the pump motor effectively.
- Q: Why is there an air bubble at the top of the dial?
- A: An air bubble is a design requirement. It acts as an expansion chamber to allow the glycerin to expand and contract with temperature changes without damaging the case seal.
- Q: Is it suitable for outdoor installation in the UAE?
- A: The stainless steel case and hermetic seal make it highly resistant to the outdoor elements and direct sunlight.
