Product details
Weiss Bimetal Dial Thermometer | 3RBM25 | 3″ Dial | 2.5″ Stem
Product Description
The 3RBM25 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 the space-constrained plant rooms of Dubai and Abu Dhabi.
This model features a wide, low-temperature range of -30 to 130°F (-35 to 55°C). This range is specifically optimized for Chilled Water (CHW), cold storage facilities, and glycol-based cooling loops. 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 perfectly positioned in 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 Mount Design: The center-back connection is ideal for installation on vertical pipes or within control panels where a front-facing dial is required.
- Low-Temperature Precision: The -30°F starting point makes it perfect for monitoring refrigeration systems and chilled water loops in the Middle East.
- 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 convenient 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 (3RBM25/130) |
| Dial Size | 3″ (75 mm) |
| Stem Length | 2.5″ (63 mm) |
| Range | -30 to 130°F / -35 to 55°C |
| Mounting Type | Rear Mount (Center Back) |
| Connection Size | 1/2″ NPT |
| Case Material | 304 Stainless Steel |
| Accuracy | $\pm$
1% of Span (ASME B40.3 Grade A) |
Frequently Asked Questions
- Q: Is the 3-inch dial large enough to read in a dark plant room?
- A: Yes, the high-contrast white face and bold black numerals are designed for industrial legibility. However, for high-ceiling or distant installations, a 5-inch dial model might be preferred.
- Q: Can this be used for outdoor air temperature?
- A: The hermetically sealed stainless steel case is designed to withstand direct sunlight, dust, and humidity.
- 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.