-Selection of on-site temperature indicating instruments in the 20–200°C range
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-What type of local temperature indicator should be used in the temperature range of 20~200? Bimetallic thermometers don’t have such a wide range – it’s frustrating!
Please also mention your medium and accuracy requirements; both pressure-type and expansion-type thermometers can cover your temperature range.
Steel-clad glass tube thermometers can also accomplish the task.
You can choose an integrated temperature sensor with on-site display
Measure the temperature of the jacket surrounding the reaction tank; 260-degree heat transfer oil or -20-degree frozen brine can be used inside it, and observation can be done on-site, as high precision is not required. Neither the Yali type nor the expansion type is manufactured by any factories these days; I’ve chosen a thermal resistor that is powered by lithium batteries and features an on-site digital display. Thank you all.