Can thermocouples be used for low-temperature measurements?
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This post was last edited by ysk121115 on 2016-4-21 at 11:40. I would like to ask under what circumstances are thermocouples used for measuring temperatures between 0 and 100 degrees Celsius; are there any specific requirements for this? Additional note: The design institute insists on using thermocouples now. From the information I’ve found, it is said that the accuracy of low-temperature thermocouples decreases, but they can still be used; an error within 1 degree is acceptable to the design institute, so I have no reason to object. Does any expert know if there are other factors that affect their use?
With such a narrow measurement range, why not use a thermal resistor? The accuracy of the thermocouple is poor.
Let me say it too – a thermistor should be used, but the design office specified thermocouples, and specifically of the E type; they haven’t changed it yet. I’m wondering what their reason is for using thermocouples
Has anyone used thermocouples in low-temperature conditions? What is the error level?
Thermocouples have greater measurement errors; the design institute probably considers it more cost-effective to choose thermocouples based on factors such as cost, measurement methods, and measurement requirements.
Thermocouples must not be used at all; how can temperature be measured if it’s lower than the temperature in the control room? Only the temperature in the control room will be displayed
Your company can certainly send a design change request to the design institute; the institute will respond that it is up to the client to make the decision, and then the cost adjustments can be made at that time. Besides, the cost of thermal resistors is much lower than that of thermocouples
For low temperatures, thermal resistors are indeed the appropriate choice. Did the design team feel embarrassed by the possibility of being challenged or questioned, and therefore insist on using thermocouples despite that? Vanity!
Thermocouples are outdated and prone to interference