Product details
Weiss Lead-Free Brass Thermowell | E35-75BSLF | 7.5″ Length | 3.5″ Stem
Product Description
The E35-75BSLF is a precision protective housing that allows for the installation and maintenance of industrial thermometers without shutting down the system. The “E35” designation identifies this as a 3/4″ NPT process connection. The “75” indicates an overall length of 7.5 inches (190 mm), while the “BSLF” suffix confirms the material is Lead-Free Brass.
A key feature of this model is the 3.5-inch insertion length (often referred to as the “stem” or “U” dimension). This design provides a significant 4-inch lagging extension (socket length), which is specifically engineered for pipes with extra-thick thermal insulation. In Dubai and Abu Dhabi high-rise projects, this thermowell allows the thermometer to clear the insulation layer while ensuring the sensing tip is correctly positioned within the water flow.
Key Features
- Lead-Free Brass Construction: Complies with international “No-Lead” laws (such as NSF/ANSI 372), making it safe and mandatory for potable/drinking water applications in the UAE.
- Extra-Long Lagging Extension: The 4-inch neck clears thick insulation, ensuring the thermometer dial remains visible and accessible for maintenance.
- 5″ Insertion Depth: Ideal for mid-sized pipelines (4″ to 8″ diameter) where deep immersion is required to bypass the pipe wall and insulation.
- Superior Heat Transfer: Brass offers excellent thermal conductivity, ensuring the thermometer reacts quickly to temperature changes in the system.
- System Protection: Protects the thermometer stem from pressure and high-velocity flow while allowing for instrument replacement without draining the line.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | E35-75BSLF |
| Overall Length | 7.5″ (190 mm) |
| Insertion Length (U) | 3.5″ (90 mm) |
| Lagging Extension (T) | 4″ (100 mm) |
| Material | Lead-Free (LF) Brass |
| Process Connection | 3/4″ NPT |
| Internal Thread | 1-1/4″ – 18 UNEF (Industrial Standard) |
| Application | Potable Water / Domestic Water / HVAC |
Frequently Asked Questions
- Q: Why is “Lead-Free” important?
- A: For any system carrying water intended for human consumption (drinking, cooking), UAE health standards increasingly require lead-free components to prevent heavy metal contamination.
- Q: Which thermometer fits this thermowell?
- A: This well is designed to house any standard industrial thermometer with a 5-inch stem, such as the Weiss A9VU3.5 or 9VBM3.5 series.
- Q: Can this be used for chilled water?
- A: Yes, brass is excellent for chilled water. The 4-inch lagging is especially useful for chilled water pipes which often have thick insulation to prevent sweating.
