Product details
Weiss Bimetal Dial Thermometer | 5RBM9-0-130 | 5″ Dial | 9″ Stem
Product Description
The 5RBM9-0-130 is engineered for environments where temperature must be monitored clearly from a distance, such as large district cooling plants or high-rise mechanical floors. The “5RBM” designation identifies this as a 5-inch (125 mm) Dial thermometer with a Rear (Center Back) Mount connection. This back-mount design provides a clean, flush-looking installation on the side of vertical pipes or storage tanks in Dubai and Abu Dhabi plant rooms.
This model features a temperature range of 0 to 130°F (-17 to 55°C), making it exceptionally well-suited for Chilled Water (CHW) and cooling tower return lines. The 9-inch (225 mm) stem is specifically designed for large-diameter pipes or systems with thick thermal insulation, ensuring the bimetal sensing element reaches deep into the fluid flow for an accurate and rapid thermal reading.
Key Features
- Massive 5″ High-Visibility Dial: The oversized display with bold black markings allows technicians to check critical cooling temperatures from a distance without needing direct access.
- 9″ Extra-Long Industrial Stem: Provides the necessary reach for large pipelines and heavily insulated systems common in UAE infrastructure projects.
- Rear (Back) Mount Configuration: Ideal for side-mounting on large pipes or storage tanks, keeping the dial face-forward for easy viewing.
- All-Stainless Steel Construction: Both the case and the stem are crafted from 304 Stainless Steel, offering superior resistance to the high humidity and corrosive air of the Middle East.
- Hermetically Sealed Case: Vacuum-sealed to prevent internal fogging and moisture ingress, a critical feature for chilled water applications where condensation is a constant challenge.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 5RBM9-0-130 |
| Dial Size | 5″ (125 mm) |
| Stem Length | 9″ (225 mm) |
| Range | 0 to 130°F / -17 to 55°C |
| Mounting Type | Rear (Center Back) Mount |
| 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: Why use a 9″ stem instead of a 6″ stem?
- A: Large district cooling pipes often have 2-3 inches of insulation. The 9″ stem ensures the sensor bypasses the insulation and reaches the actual fluid flow in large-diameter pipes (12″ and above).
- Q: Is the dial glass or plastic?
- A: This model typically features a heavy-duty Instrument Glass window for maximum clarity and scratch resistance in industrial settings.
- Q: Does this include the thermowell?
- A: For pressurized applications, it must be installed in a 9″ Weiss Thermowell (typically model E9-35BS) to prevent system leaks and allow for maintenance without shutdown.
