Product details
Weiss Bimetal Dial Thermometer | 5VBM4/250 | 5″ Dial | 4″ Stem
Product Description
The 5VBM4/250 is engineered for applications where temperature must be monitored clearly from a distance. The “5VBM” designation identifies this as a 5-inch (125 mm) Dial thermometer with a Vertical (Bottom) Mount connection. This vertical orientation is perfect for installation on top of horizontal pipelines, ensuring the dial faces the operator directly in Dubai and Abu Dhabi plant rooms.
This model features a wide temperature range of 0 to 250°F (-10 to 120°C), making it exceptionally versatile for monitoring domestic hot water supply, heating water systems, and low-pressure steam. The 4-inch (100 mm) stem provides an ideal immersion depth for standard 4″ to 8″ diameter pipes, ensuring the bimetal sensing element is positioned accurately within the fluid flow.
Key Features
- Massive 5″ High-Visibility Dial: The oversized display with bold, black markings allows technicians to check temperatures at a glance from a distance, improving efficiency in large plant rooms.
- 4″ Industrial Stem: Specifically sized for common pipeline diameters, providing optimal immersion for reliable thermal accuracy.
- All-Stainless Steel Construction: Both the case and the stem are crafted from 304 Stainless Steel, providing 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, ensuring the dial remains crystal clear in humid mechanical environments.
- External Recalibration: Features an easy-to-use adjustment screw on the back of the case for simple field calibration to maintain long-term precision.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 5VBM4/250 |
| Dial Size | 5″ (125 mm) |
| Stem Length | 4″ (100 mm) |
| Range | 0 to 250°F / -10 to 120°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 domestic hot water?
- A: Yes, the 0-250°F range is perfect for DHW supply lines and heating water loops in commercial towers.
- Q: Can I install this on a vertical pipe?
- A: Because it is a bottom mount, it is best suited for horizontal pipes (so the dial is upright). For vertical pipes, you might prefer a Back Mount (RBM) model or an Adjustable Angle
- Q: Does this require a thermowell?
- A: For pressurized piping, it must be installed in a 4″ Weiss Thermowell (typically model E4-35BS) to prevent system leaks and allow for maintenance without shutdown.
