Thermowells

Technical Data | Installation & Operation | Ordering Data | Downloads | Back

Brass or Stainless Steel
Stocked for fast delivery
Low Cost

Thermowells
Thermowells are recommended to protect both the operator and the temperature sensor. The proper thermowell will reduce the possibility of damage to the temperature sensor due to corrosion, pressure or the flow of abrasive or viscous media. In addition a defective instrument may be removed without shutting down or draining the process. These stock wells have ¹/₂" process & instrument connections with a 0.260" bore. Wells with other dimensions and materials are readily available on order.

We manufacture our Thermowells for the energy management industry in large quantities on high speed NC machines. This allows us to offer these wells at excellent prices while maintaining the quality & tolerances you expect. We stock brass and stainless steel wells in 4", 6" and 8" lengths for immediate delivery.

Thermowells - Technical Data

Stainless Steel

At higher temperatures or pressures or where corrosion could be a problem stainless steel should be considered. Our standard 304 and 303 S/S has excellent resistance to mildly corrosive atmospheres & can withstand higher pressures and temperatures than brass. For more severe applications we provide 316, Monel and Inconel wells to order.

Brass Wells

Brass wells are usually chosen for applications measuring water temperature or steam at moderate temperatures and pressures. In these conditions they provide good protection and corrosion resistance. Because brass is readily machined & less expensive than stainless steel these are more economical.

Thermowells - Installation & Operation

All our wells have a ¹/₂" NPT female thread for sensor connection. We recommend that you add some heat transfer paste to the bottom of the well to improve heat transfer before inserting the sensor. We recommend that you use a spring loaded sensor such our TS-P-4-T-10K to ensure the sensor makes good thermal contact with the bottom of the well.

Select stainless steel at higher temperatures or pressures or where corrosion could be a problem. Our standard 304 S/S has excellent resistance to mildly corrosive atmospheres and can withstand higher pressures and temperatures than brass.

Brass wells are usually chosen for applications measuring water temperature or steam at moderate temperatures and pressures. In these conditions they provide good protection and corrosion resistance. Because brass is readily machined and less expensive than stainless steel these are more economical.

Use the table below to ensure that you are operating in the safe range.

Pressure - Temperature rating - lbs. per square inch

Material	Temperature in °Fahrenheit
Material	70	200	400	600	800	1000	1200
BRASS	5000	4200	1000	-	-	-	-
304 S/S	7000	6200	5600	5400	5200	4500	1650
316 S/S	7000	7000	6400	6200	6100	5100	2500