Description
Gas-actuated thermometer Wika 74
Gas-actuated thermometer Wika 74 has been designed as an addition to the standard range of thermometers to meet the special requirements of the food, bio, and pharmaceutical industries as well as in the paints and varnishes industry.
The model 74 gas-actuated thermometer is ideally suited to fulfill the high standard requirements of sanitary applications. Based on a third-party verification, the thermometer complies with the 3-A standard and is marked by us accordingly.
The stem and case of the Gas-actuated thermometer are made of stainless steel. The surface of the wetted parts is polished, and a wide variety of process connections is available to ensure the optimal adaptation to many different process requirements. The stem is free of dead space.
Applications
- Food industry
- Sanitary applications
- Bio and pharmaceutical industries
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Gas-actuated thermometers are available with various styles of plain bulbs or union connection bulbs. The entire thermometer, including the bulb, head assembly and capillary tubing (on remote types), is filled with an inert gas, which offers fast response and linear dial graduations.
Two varieties of thermometers use gas: Constant-volume gas thermometers and constant-pressure gas thermometers. Constant-volume gas thermometers are much more frequently used. Gas, typically helium or hydrogen, is contained in a glass bulb attached to a mercury manometer in these thermometers.
The sensing element in a pressure thermometer consists of a stainless-steel bulb containing a liquid or gas. If the fluid was not constrained, temperature rises would cause its volume to increase. However, because it is constrained in a bulb and cannot expand, its pressure rises instead.
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