Product details
Weiss Bimetal Dial Thermometer | 3VBM4-0-120 | 3″ Dial | 4″ Stem
Product Description
The 3VBM4-0-120 is built for reliability in standard mechanical environments. 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 is upright and easily accessible for technicians in Dubai and Abu Dhabi plant rooms.
This model features a temperature range of 0 to 120°F (-17 to 49°C), which is the industry standard for Chilled Water (CHW) and condenser water applications. The 4-inch (100 mm) stem provides an ideal immersion depth for standard 4″ to 8″ diameter pipes, ensuring the bimetal helix is positioned accurately within the fluid flow for rapid thermal response.
Key Features
- Compact 3″ Industrial Dial: Provides a clear, high-contrast display with bold markings, fitting easily into tight piping manifolds where space is limited.
- 4″ Industrial Stem: Sized perfectly for common pipeline diameters, providing optimal immersion while bypassing standard thermal insulation.
- All-Stainless Steel Construction: Both the case and the stem are crafted from 304 Stainless Steel, offering excellent resistance to the high humidity and corrosive coastal air of the Middle East.
- Hermetically Sealed: The case is vacuum-sealed to prevent internal fogging and moisture ingress, essential for chilled water systems where condensation is common.
- External Reset: Includes a calibration screw on the back of the case for simple field adjustment to maintain accuracy.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 3VBM4-0-120 |
| Dial Size | 3″ (75 mm) |
| Stem Length | 4″ (100 mm) |
| Range | 0 to 120°F / -17 to 49°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 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, dust, and humidity.
- Q: Can this be used for domestic hot water?
- A: While it can measure up to 120°F, hot water systems often exceed this. For DHW, the 0-200°F or 0-250°F models are typically safer and more versatile.
- Q: Does this require a thermowell?
- A: For pressurized piping,