Product details
Weiss Bimetal Dial Thermometer | 5VBM9-250 | 5″ Dial | 9″ Stem
Product Description
The 5VBM9-250 is engineered for environments 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 ideal for installation on horizontal pipelines, providing a clear, upright display for operators 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, heating water systems, and low-pressure steam. The 9-inch (225 mm) stem is specifically designed for large-diameter pipes or systems with thick insulation, ensuring the bimetal sensing element is positioned in the center of the fluid flow for the most accurate reading.
Key Features
- Oversized 5″ High-Visibility Dial: Features high-contrast black markings on a white background, allowing for effortless reading even in large or poorly lit mechanical spaces.
- 9″ Extra-Long Industrial Stem: Provides the necessary depth for large pipes and heavily insulated headers common in UAE district heating and cooling plants.
- All-Stainless Steel Construction: The 304 Stainless Steel case and stem offer maximum resistance to rust, corrosion, and the harsh saline air of the Middle East.
- Hermetically Sealed Case: Vacuum-sealed to prevent internal fogging and moisture ingress, ensuring the dial remains crystal clear throughout its service life.
- External Recalibration: Includes an external reset screw on the back of the case, allowing for easy field calibration to ensure long-term precision.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | 5VBM9-250 |
| Dial Size | 5″ (125 mm) |
| Stem Length | 9″ (225 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 |
| Accuracy | $\pm$
1% of Span (ASME B40.3 Grade A) |
Frequently Asked Questions
- Q: Can this thermometer be used for steam?
- A: Yes, the 250°F range is suitable for low-pressure steam. For high-pressure steam exceeding this temperature, a higher-range model (such as 50-550°F) is required.
- Q: Why do I need a 9″ stem?
- A: Large pipes (10″ diameter and above) usually have at least 2-3 inches of insulation. The 9″ stem ensures the sensor bypasses the insulation and reaches the actual fluid flow.
- 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.
