Product details
Weiss Industrial Thermowell | E35-75-BS | 7.5″ Length | Brass
Product Description
The E35-75-BS is a precision-machined protective housing that allows thermometers to be installed, removed, or replaced without shutting down the system or draining the fluid lines. The “E35” designation identifies this as a 3/4″ NPT process connection with a Stepped Stem profile. The stepped design (a reduced diameter at the sensing tip) is specifically engineered to minimize thermal mass, ensuring a faster temperature response compared to straight-shank models.
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 specifically intended for 6-inch (150 mm) stem thermometers, providing a 1.5-inch clearance that acts as a lagging extension to clear thick pipe insulation (lagging).
Key Features
- Superior Heat Transfer: Brass offers high thermal conductivity, ensuring the thermometer reacts quickly and accurately to temperature changes in the fluid stream.
- Stepped Stem for Rapid Response: Features a reduced diameter at the sensing end to decrease thermal lag, making it ideal for systems requiring real-time monitoring.
- 5″ Total Length: Designed to perfectly house a 6-inch stem thermometer while allowing the dial to clear standard thermal insulation layers.
- Standard 3/4″ NPT Connection: Ensuring seamless installation into standard pipe tees and fittings used in UAE infrastructure projects.
- Mechanical Protection: Protects the thermometer stem from bending or damage caused by the force of high-velocity fluid flow.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | E35-75-BS |
| Overall Length | 7.5″ (190 mm) |
| Insertion Length (U) | 6″ (150 mm) |
| Material | Brass |
| Stem Design | Stepped 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 use a 7.5″ well for a 6″ thermometer?
- A: The extra 1.5 inches of length provides a “neck” that extends through the insulation. This ensures the 6-inch thermometer stem is fully immersed in the active fluid stream within the well.
- Q: Which thermometer fits this well?
- A: This well is designed for any standard industrial 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, you may be required to use the Lead-Free (LF) version (E35-75BSLF) to comply with health codes.