Product details
Weiss Bimetal Dial Thermometer | 5VBM25-120 | 5″ Dial | 2.5″ Stem
Product Description
The 5VBM25-120 is engineered for industrial environments where readability from a distance is a priority. The “5VBM” designation identifies this as a 5-inch (125 mm) Dial thermometer with a Vertical (Bottom) Mount connection. This configuration is perfect for installation on horizontal pipelines, ensuring the large dial faces the operator upright for easy monitoring in Dubai and Abu Dhabi mechanical rooms.
This model features a versatile temperature range of -20 to 120°F (-30 to 50°C), making it exceptionally well-suited for Chilled Water (CHW), glycol loops, and systems that may experience sub-freezing temperatures. The compact 2.5-inch (63 mm) stem is specifically designed for smaller pipe sizes or restricted spaces, ensuring accurate temperature sensing without obstructing flow in tighter manifolds.
Key Features
- Massive 5″ High-Visibility Dial: The oversized display with high-contrast markings allows technicians to check critical cooling temperatures from across a plant room.
- Compact 2.5″ Stem: Optimized for small-to-medium pipe diameters, ensuring the sensor is correctly positioned in the fluid stream.
- 304 Stainless Steel Construction: Both the case and the stem offer superior resistance to corrosion and the humid, saline air common in Middle Eastern coastal regions.
- Hermetically Sealed: The vacuum-sealed case prevents internal fogging and moisture ingress, essential for maintaining clarity in chilled water applications where condensation is prevalent.
- External Reset: Features a calibration adjustment screw on the back of the case for easy field recalibration to ensure long-term precision.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 5VBM25-120 |
| Dial Size | 5″ (125 mm) |
| Stem Length | 2.5″ (63 mm) |
| Range | -20 to 120°F / -30 to 50°C |
| Mounting Type | Vertical (Bottom) 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 the -20 to 120°F range instead of 0-120°F?
- A: The extended low-end range (-20°F) provides a safety buffer for systems using glycol or those located in areas where temperatures might drop below freezing.
- Q: Is the 2.5″ stem too short for insulated pipes?
- A: If the pipe has thick insulation (e.g., 2 inches), you may need a longer stem or a thermowell with an extension to ensure the dial clears the insulation layer.
- 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 allow for safe maintenance without system shutdown.
