Product details
Weiss Industrial Thermowell | SF12-BS | 2″ Length | Brass
Product Description
The SF12-BS is a precision-machined protective housing that allows for the safe installation and replacement of thermometers without the need to drain the system. The “SF” designation typically identifies this as a Straight Shank (standard) profile. The “12” denotes the 1/2″ NPT process connection, making it ideal for compact manifolds and equipment branch lines where space for a larger 3/4″ fitting is unavailable.
This model features a total length of 2 inches (50 mm) and is manufactured from high-quality Brass. Brass is preferred in HVAC applications for its superior thermal conductivity, ensuring that the thermometer reacts quickly and accurately to temperature changes. In Dubai and Abu Dhabi mechanical rooms, this 2-inch well is specifically used for small-diameter pipes (typically 2″ and under) where a longer well would strike the opposite wall of the pipe.
Key Features
- Compact 2″ Profile: Engineered specifically for small-diameter pipelines, branch headers, and tight mechanical skids where space is at a premium.
- High Thermal Conductivity: The brass construction ensures rapid heat transfer from the fluid to the thermometer sensor for real-time monitoring.
- 1/2″ NPT Process Connection: A versatile and compact mounting size suitable for a wide range of industrial equipment and small pipe fittings.
- Corrosion Resistance: Offers excellent durability in freshwater, chilled water, and non-corrosive fluid environments common in UAE infrastructure.
- System Serviceability: Protects the thermometer stem from pressure and fluid velocity while allowing for maintenance or calibration without system downtime.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | SF12-BS (Product Code: 22200) |
| Overall Length | 2″ (50 mm) |
| Insertion Length (U) | Approx. 1.6″ (40 mm) |
| Material | Brass |
| Stem Design | Straight Shank |
| Process Connection | 1/2″ NPT |
| Internal Thread | 1-1/4″ – 18 UNEF (Industrial Standard) |
| Application | Small Pipe HVAC / Hot & Chilled Water |
Frequently Asked Questions
- Q: Which thermometer fits this thermowell?
- A: This well is designed for compact industrial thermometers with a 2-inch stem, such as the Weiss A9VU2 or 9VBM2 series.
- Q: Can this be used in potable (drinking) water?
- A: This is a standard brass model. For potable water systems in the UAE, health regulations often require the Lead-Free (LF)
- Q: Why use 1/2″ NPT instead of 3/4″ NPT?
- A: 1/2″ NPT is used for smaller pipes (e.g., 1″ or 1.5″ pipes) where a 3/4″ tapping would weaken the pipe wall or where the equipment ports are pre-sized for 1/2″.