Product details
Weiss Bimetal Dial Thermometer | 3VBM25 | 3″ Dial | 2.5″ Stem | 0-50°C
Product Description
The 3VBM25 (0-50°C) is engineered for industrial applications where temperature is tracked in Celsius. The “3VBM” designation identifies this as a 3-inch (75 mm) Dial thermometer with a Vertical (Bottom) Mount connection. This vertical orientation is the most common for installation on horizontal pipelines, ensuring the dial face is upright and easily legible for operators in Dubai and Abu Dhabi plant rooms.
This model features a dedicated range of 0 to 50°C, specifically optimized for Chilled Water (CHW) and cooling tower applications. The single-scale Celsius display provides higher resolution for monitoring critical cooling temperatures (like 5°C supply and 12°C return) compared to dual-scale models. The 2.5-inch (63 mm) stem is designed for smaller pipe sizes or restricted spaces where a longer stem would cause flow obstruction.
Key Features
- Compact 3″ Industrial Dial: Provides a clean, high-contrast Celsius-only display, making it easy to read in cramped mechanical spaces.
- 5″ Short Stem: Specifically designed for small-diameter pipes or headers, ensuring accurate immersion while maintaining a compact profile.
- 304 Stainless Steel Construction: Both the case and the stem are crafted from 304 Stainless Steel, offering superior resistance to the high humidity and coastal conditions of the Middle East.
- Hermetically Sealed: The case is vacuum-sealed to prevent internal fogging and moisture ingress, a vital feature for chilled water applications where condensation is prevalent.
- External Reset: Includes a calibration adjustment screw on the back of the case for simple field recalibration to ensure long-term accuracy.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 3VBM25 (0-50°C) |
| Dial Size | 3″ (75 mm) |
| Stem Length | 2.5″ (63 mm) |
| Range | 0 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: Is the 2.5″ stem too short for insulated pipes?
- A: If the pipe has thick insulation (over 1 inch), you may need a thermowell with an extension or a longer stem model to ensure the dial clears the insulation layer.
- Q: Is this thermometer suitable for outdoor installation?
- A: The 304 Stainless Steel case and hermetic seal make it highly resistant to the UAE’s intense sunlight and dust.
- 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 leaks and allow for maintenance without system shutdown.