Product details
Weiss Industrial Thermowell | B35-75BS | 7.5″ Length | Brass
Product Description
The B35-75BS is a precision-machined protective sleeve that allows thermometers to be installed, maintained, or replaced without shutting down the system or draining the fluid lines. The “B35” designation identifies this as a 3/4″ NPT process connection with a Straight Shank profile. Unlike stepped or reduced-tip models, the straight shank provides maximum structural strength, making it ideal for systems with high-velocity fluid flow where mechanical stress is a concern.
The “75” indicates an overall length of 7.5 inches (190 mm), and the “BS” confirms it is manufactured from Brass. In Dubai and Abu Dhabi mechanical rooms, this 7.5-inch length is the standard fit for 6-inch (150 mm) stem thermometers. It provides a 1.5-inch neck extension that ensures the thermometer dial clears the pipe insulation (lagging) while the sensing stem remains fully immersed in the center of the fluid stream.
Key Features
- High Thermal Conductivity: Brass construction ensures efficient heat transfer from the process fluid to the thermometer sensor for accurate temperature monitoring.
- Straight Shank Design: Provides superior structural integrity and resistance to bending in high-flow piping systems.
- 5″ Total Length: Specifically designed for 6-inch stem thermometers, providing a built-in lagging extension for insulated pipes.
- Standard 3/4″ NPT Connection: The industrial standard mounting size, ensuring compatibility with most pipe tees and fittings in UAE infrastructure.
- Maintenance Friendly: Allows for the replacement of temperature instruments without system downtime or loss of process fluid.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | B35-75BS |
| Overall Length | 7.5″ (190 mm) |
| Insertion Length (U) | 6″ (150 mm) |
| Material | Brass |
| Stem Design | Straight Shank |
| Process Connection | 3/4″ NPT |
| Internal Thread | 1-1/4″ – 18 UNEF (Industrial Standard) |
| Application | HVAC / Chilled Water / Hot Water |
Frequently Asked Questions
- Q: Why choose a Straight Shank (B35) over a Stepped Stem (E35)?
- A: While stepped stems react faster to temperature changes, the straight shank (B35) is physically stronger. It is often preferred in large-diameter pipes with very high flow rates where the force of the water could potentially damage a thinner tip.
- Q: Which thermometer fits this well?
- A: This well is designed for any standard industrial glass or bimetal thermometer with a 6-inch stem, such as the Weiss A9VU6 or 9VBM6 series.
- Q: Can this be used for potable (drinking) water?
- A: This is standard brass. For potable water projects in the UAE, health regulations may require the Lead-Free (LF) version (B35-75BSLF).