Product details
Weiss Bimetal Dial Thermometer | 3RBM25-0-130 | 3″ Dial | 2.5″ Stem
Product Description
The 3RBM25-0-130 is engineered for durability in demanding mechanical environments. The “3RBM” designation identifies this as a 3-inch (75 mm) Dial thermometer with a Rear (Center Back) Mount connection. This back-mount configuration allows for a clean, flush-looking installation on the side of pipes or panels, making it ideal for space-constrained plant rooms in Dubai and Abu Dhabi.
This model features a temperature range of 0 to 130°F (-17 to 55°C), which is perfectly optimized for Chilled Water (CHW), cooling tower return lines, and general HVAC monitoring. The compact 2.5-inch (63 mm) stem is designed for high-sensitivity and rapid thermal response in small-to-mid-sized piping, ensuring that the bimetal sensing element is accurately positioned within the fluid stream.
Key Features
- Compact 3″ High-Visibility Dial: Features a clear, high-contrast face that provides accurate readings while maintaining a small footprint on compact equipment.
- Rear (Center Back) Mount: Ideal for side-mounting on vertical pipes or within control panels where a front-facing dial is required.
- Chilled Water Optimized: The 0-130°F range provides the necessary resolution for precise cooling system monitoring.
- All-Stainless Steel Durability: Housed in a 304 Stainless Steel case with a hermetic seal, providing maximum protection against moisture ingress and the saline air of the UAE.
- External Reset: Includes a calibration adjustment screw on the back of the case, allowing for easy field recalibration to ensure long-term accuracy.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 3RBM25 (0-130) |
| Dial Size | 3″ (75 mm) |
| Stem Length | 2.5″ (63 mm) |
| Range | 0 to 130°F / -17 to 55°C |
| Mounting Type | Rear Mount (Center Back) |
| Connection Size | 1/2″ NPT |
| Case Material | 304 Stainless Steel |
| Internal Type | Bimetal Helix |
| Accuracy | $\pm$
1% of Span (ASME B40.3 Grade A) |
Frequently Asked Questions
- Q: Is the 2.5″ stem suitable for insulated pipes?
- A: For pipes with thick insulation, a longer stem or a thermowell with an extension may be required to ensure the dial is visible and not buried in the lagging.
- Q: Can this be used for domestic hot water?
- A: While it can measure up to 130°F, hot water systems often operate at higher temperatures. For DHW, the 0-200°F or 0-250°F models are generally recommended.
- Q: Does this require a thermowell?
- A: For pressurized piping, it must be installed in a 2.5″ Weiss Thermowell (typically model E25-35BS) to prevent system leaks and allow for maintenance without shutdown.