Temperature sensors or indicating type temperature gauges are not directly inserted into the process pipe- unless these are used to measure the outside temperature of process pipe- instead- these are used with thermowells. By using thermowells- sensors and gauges will not interfere the process line operation- and the users are able to perform the maintenance procedure of the process line more easily. A500 and A510 Series are either pipe or tube with one end is sealed. These thermowells are used in the process pipe where a very slow current is exist or in a container- and its length can be vary.

●Material
In general- the thermowell material chosen for the installation is governed mainly by the corrosion condition the themowell will face. Recommended material for various services are given in the corrosion table. Occasionally- the material consideration is one of strength rather than corrosion. For example- a stainless steel thermowell may be required for a high pressure water service where otherwise a brass thermowell woule be satisfactory from a corrosion standpoint.

●Insertion
The distance from the end of the well to the underside of the thread or other connection means (designated as U) is the insertion length.

●Tapered or straight type
Tapered type thermowells provide greater stiffness for the same sensitivity. The higher strength to weight ratio gives these thermowells higher natural frequency then for equivalent length straight type thermowells- thus permitting operation at higher fiuid velocity.
●Bore size
Almost any installation uses several type of temperature measuring instruments. The selection of a standard bore diameter can produce extreme flexibility within the palnt.

●Option
Wake frequency calculations in accordance with ASME PTC 19.3 WISE Inc. offer this as an engineering service.