Is it necessary to specify the temperature measurement range when purchasing a PT100 thermistor?
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This post was last edited by vvvwww109 on 2011-3-24 at 16:08. We need to purchase a batch of thermoresistors; the temperature measurement ranges specified for each thermoresistor in the engineering design equipment list are -50~50°C, 0~100°C, 0~150°C, and so on. However, the measurement range of thermal resistors is generally from -200 to 500 degrees Celsius, which meets these requirements. Question: Is it necessary to provide this information to the manufacturer when making a purchase? Also, is it necessary to specify the pressure rating for flange connections? Urgently need an answer, thank you
But it’s better to give a rough estimate; you can refer to information regarding the material of the protective tube and such
It’s of course good to increase the temperature, but it’s not necessary to do so. The pressure rating of the flange must definitely be specified, as well as the type of joint, the nominal diameter, and the flange standard number – none of these can be omitted.
Reply to 2# luyiqi5000: Thank you, but what exactly does the temperature measurement range of each thermal resistor mean? I don’t quite understand either
Reply to 4# vvvwww109: It probably refers to the temperature range that can be reached during use, such as when boiling water, where the temperature ranges from 0 to 100 degrees
It’s not necessary to specify the order details; just indicate that it is PT100. However, the material, insertion length, installation method, accuracy grade, and explosion protection rating must be specified.
Reply to 1# vvvwww109: Generally, it’s not necessary, but aspects such as the installation method, insertion depth, flange material, protection rating, and protective tube material must be clearly specified – these are the most important things. Regarding flanges, generally the thickness requirement is not very high, but it’s still advisable to specify it for all of them. It depends on the technical requirements on the poster’s end.
Thermal resistors are classified into Grade A and Grade B; if designed by a design institute, the accuracy grade is usually specified； At the same time, attention must also be paid to the properties of the medium – whether a special material for the coating is required – and issues such as flow rate may also come into play. Therefore, it is best to contact the manufacturer of the thermal resistor to find out what parameters they need.
The temperature range needs to be specified; -200 to 500 represents the overall range, while the typical temperature measurement range for thin-film platinum resistors is -50 to 500. So you need to specify both the actual operating temperature and the maximum operating temperature. The pressure rating for the flange connection should also be provided; it would be best to include the connection method you used previously as well, so that the manufacturer can help determine the appropriate parameters.
It’s not all mentioned above; temperature is also related to the choice of outer protective tube, which is very important.
Things such as the material requirements for instruments, electrical requirements, and the processing details of pipelines or equipment need to be specified when placing an order; these can be included in the technical specifications or in the data sheets.