A thermowell is a pressure‑rated sleeve installed in a pipe to house a temperature sensor. It protects the sensor from flow, corrosion, and mechanical damage and places the sensing tip directly in the fluid stream for accurate, stable readings.
We install thermowells on live systems using an engineered hot‑tap method—no drain‑down or shutdown. The result is a permanent, serviceable port where temperature probes can be added, replaced, and calibrated under pressure with full, documented QA/QC.
Why Thermowell Insertion
Add measurement, not downtime. Thermowells let you install and maintain temperature sensors on live systems—delivering reliable data for control and optimization while keeping service online.
Where it Delivers
District energy/chilled & hot water
Supply/return sensors for optimization and capacity planning.
Energy Transfer Stations
Reliable trending for control tuning and M&V.
Condenser water & glycol
Stable temperature points for seasonal changeover and protection.
Frequently asked questions
A thermowell insertion is the process of installing a protective sleeve into an active pipeline so temperature sensors can be added without shutting down the system. The thermowell isolates the instrument from pressure, flow, and media while allowing accurate temperature readings.
Yes, live installation is our specialty. WellFab performs thermowell insertions on active lines using controlled hot tapping and engineered fittings, eliminating downtime and avoiding drain-downs or shutdowns.
Yes, a branch connection (custom fitting) and isolation valve are required. WellFab handles the full supply, design, welding, and installation.
Thermowells can be installed on a wide range of active mechanical systems—including district energy heating and cooling mains, chilled water and glycol loops, steam and condensate lines, domestic hot water and industrial process lines—and are used across industries such as utilities, commercial and residential towers, industrial facilities, data centers, and energy transfer stations where accurate temperature monitoring and zero-downtime solutions are essential.
Thermowells protect sensors from pressure, flow, and corrosion, allowing accurate temperature readings while keeping the system live. They also let sensors be serviced or replaced without shutdown. Thermowells are used across active mechanical systems—such as district energy mains, chilled water and glycol loops, steam lines, and industrial process piping—where continuous operation is essential.