Product details
Weiss Liquid Filled Gauge | LF403 | 4″ Dial | 0-200 PSI/KPA
Product Description
The LF403 is engineered for “front-of-panel” installation where stability and readability are paramount. The gauge features a Glycerin filling, which serves to dampen internal movement and protect the gear mechanism from the mechanical wear caused by rapid pulsations or equipment vibration. This makes it an essential component for pump control panels and industrial machinery in Dubai and Abu Dhabi.
This model is characterized by its 4-inch (100 mm) dial and Center Back Mount (CBM) connection. The “3” in the LF403 series designation typically indicates a U-Clamp mounting configuration, allowing the gauge to be securely fastened to a panel from the rear. Housed in a polished 304 Stainless Steel case, it provides exceptional durability and a professional aesthetic for modern mechanical systems.
Key Features
- Vibration Dampening: Glycerin filling ensures a steady pointer and extends the life of the instrument in high-vibration applications.
- U-Clamp Panel Mounting: Specifically designed for a clean, flush-fit installation into control panels and equipment dashboards.
- Large 4″ High-Visibility Dial: Provides an oversized viewing area with a dual-scale (PSI/KPA) readout, satisfying international engineering standards.
- Stainless Steel Durability: The hermetically sealed 304 SS case protects against moisture ingress and the corrosive saline air common in the Middle East.
- Precision Internals: Built with a high-grade copper alloy/brass movement for consistent and accurate performance.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | LF403 |
| Dial Size | 4″ (100 mm) |
| Range | 0 – 200 PSI / 0 – 1400 KPA |
| Filling | Glycerin (Standard) |
| Mounting Type | U-Clamp (Flush Panel Mount) |
| Connection Location | Center Back Mount (CBM) |
| Connection Size | 1/4″ NPT |
| Case Material | 304 Stainless Steel |
| Accuracy | $\pm$
1.0% of Full Scale (ASME B40.100 Grade 1A) |
Frequently Asked Questions
- Q: What is the benefit of the U-Clamp mount?
- A: Unlike a front flange which uses screws on the face of the panel, the U-clamp secures the gauge from behind, providing a cleaner, screwless look on the front of the control board.
- Q: Can this gauge be used for chilled water pump panels?
- A: Yes, the 200 PSI range is ideal for chilled water systems, and the liquid filling handles the intense vibration of the pump motor.
- Q: Why is there an air bubble at the top of the dial?
- A: This is a design requirement. The bubble allows the glycerin to expand and contract as the ambient temperature changes, preventing the seals from leaking.
