The NOSHOK 300 Series instrument type bimetal thermometers are high quality thermometers that feature a sturdy, corrosion resistant series 304 stainless steel case with electropolished 304 stainless steel bezel. This design provides a hermetic seal, which prevent crystal fogging and damage caused by moisture to the working parts. A slotted-hex adjustment head offers field calibration through use of a screw driver or wrench. This allows maximum accuracy within one percent of full scale. Calibration standard are traceable to the National Institute of Standards and Technology. NOSHOK bimetal thermometers are available from AMS Instrumentation and Calibration .
Additional features of bimetal thermometers include:
- A balanced lightweight aluminium pointer with black finish
- An optically clear glass crystal
- 304 series stainless steel stems welded at tip and case to prevent leakage
The metal element, a responsive temperature sensing helix, is also coated with a viscous silicone to minimise pointer oscillation and to improve temperature transmission. This sensing helix has been carefully sized and tested, heat-treated and aged to relieve and inherent stresses and insure specified accuracy. The heavy gauge aluminium dial has a hard surface with matte finished to reduce glare. The dished form dial with Celsius on the lower plane and Fahrenheit on the upper plane offers accurate indication of both scales, and eliminates reading errors.
NOSHOK recommend Thermowells for pressure, corrosive fluids and high velocity applications. In addition, the added use of a Thermowell allows an instrument to be removed and replaced without shutting down and possibly draining the process.