Product details
Weiss Stainless Steel Thermowell | ER12-75SS | 7.5″ Length | 304 SS
Product Description
The ER12-75SS serves as a critical barrier between the process fluid and the measuring instrument. The “ER” designation identifies this as a Reduced Tip thermowell, which enhances sensitivity and response time by minimizing the thermal mass around the sensor. The “12” indicates a 1/2″ NPT Internal Thread, while the “75” signifies an overall length of 7.5 inches (190 mm).
In the UAE’s industrial sector, this 7.5-inch model is specifically chosen for large-diameter headers and pipes with thick insulation (2-3 inches). By using a thermowell, facilities in Dubai and Abu Dhabi can remove or replace thermometers for calibration without draining the system or shutting down the plant, ensuring continuous operation.
Key Features
- 304 Stainless Steel Construction: Offers excellent resistance to oxidation and corrosion, making it ideal for the humid and saline environments of Middle Eastern mechanical rooms.
- Reduced Tip Design: Increases the speed of heat transfer to the thermometer, providing more rapid and accurate temperature readings.
- 5″ Extended Length: Perfect for deep immersion in large pipes, ensuring the sensor reaches the true core temperature of the fluid.
- Instrument Protection: Shields the thermometer from high-velocity flow, high pressure (up to 5000 PSI depending on temperature), and mechanical damage.
- Leak-Proof Connection: Features a standard 3/4″ NPT external process connection and a 1/2″ NPT internal thread for a secure, airtight fit.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | ER12-75SS |
| Overall Length | 7.5″ (190 mm) |
| Insertion (U) Length | 6.0″ (approx.) |
| Material | 304 Stainless Steel |
| Process Connection | 3/4″ NPT (External) |
| Instrument Connection | 1/2″ NPT (Internal) |
| Shank Type | Reduced Tip (Fast Response) |
| Pressure Rating | Up to 5000 PSI @ 70°F |
Frequently Asked Questions
- Q: Why use a 7.5″ thermowell instead of a 3.5″ or 6″ model?
- A: This length is specifically for pipes that are heavily insulated. The 7.5″ length allows 2-3 inches of the well to pass through the insulation while still providing 4-5 inches of immersion in the fluid.
- Q: Can this be used for corrosive chemicals?
- A: 304 Stainless Steel is resistant to many chemicals, but for highly aggressive media or saltwater, 316 Stainless Steel is often recommended.
- Q: Do I need to use thermal paste inside the well?
- A: While not strictly required, using a thermal transfer compound (heat sink paste) inside the well can further improve the response time and accuracy of the thermometer.
