Issues regarding the use of on-site temperature sensors
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Dear seniors, I majored in chemical engineering and have been in the temperature sensor industry for only a short time. Now my supervisor has asked me to explore the petrochemical industry (our company has been working in the power sector until now). But we don’t have much experience in this area, so I would like to ask everyone: what are the most common problems that arise when using temperature sensors in practice? What kind of issues do they present? This will help me find a way forward. Thank you all in advance!
Temperature sensor? ? What is it? I understand it as the thermocouple thermal resistance! Under normal use, as long as the vibration is not excessive and there is no prolonged overheating, no problems will arise!
That’s right, it’s a thermal resistance thermocouple. Do you mean there are no parts that tend to break easily? How long can it generally be used? Is it enough to verify it once a year? Doesn’t it need to be replaced frequently?
Are thermocouples and thermal resistors in the petrochemical industry already well-developed? Are there no issues with wear and corrosion resistance, as well as leak prevention?
In terms of temperature, these are indeed mature products, so you don’t need to worry much; just gain experience over time through actual use
Reply to 5# Testo: You’re talking about the issue of protecting the catheter here! I just uploaded a document! Go download it! http://bbs.hcbbs.com/thread-784552-1-2.html
Oh, okay, I’ll go take a look. Thank you. I’m not very familiar with the petrochemical industry; here people discuss sensors and protective sleeves separately, whereas we always use them together as a set. . :It seems that the petrochemical industry is indeed more mature than the power industry.
Well, there are some issues: 1. The difference between the displayed temperature and the actual temperature is quite large； 2. The data is prone to changes due to external influences ；
Sensors and protective sleeves must be considered together; in addition to meeting the standard requirements, frequency vibration calculations are now required, and you need to prepare a set of calculation methods.
Classmate on the 9th floor, there are two possible explanations for your first question: either the sensing element itself does not meet the required standards, or it is installed in the wrong location or too shallowly, not at the actual point where temperature measurement should take place； The second issue is either that the wiring shielding is inadequate, or the thermocouple you are using is of the junction-box type; although it has a fast response time, it is prone to external interference.
Reply to 9# wanyuanchen, classmate on floor 9 – thank you for helping to provide the information, hehe. There are two possible explanations for your first question: either the sensing element itself does not meet the required standards, or it is installed in the wrong location or too shallowly, not at the actual point where temperature measurement is needed ； The second issue is either that the wiring shielding is inadequate, or the thermocouple you are using is of the junction-box type; although it has a fast response time, it is prone to external interference. I wonder if this is a common issue where you are? Which manufacturer’s sensors are being used, thermocouples or resistors? If necessary, we can provide samples for free for you to try out, based on your actual situation.