High Range Temp Sensor IC with Upper Limit of 400°C?

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Discussion Overview

The discussion revolves around the search for a temperature sensor integrated circuit (IC) that can operate at high temperatures, specifically up to 400°C or potentially 350°C. Participants explore various alternatives and considerations related to high-temperature sensing in industrial applications.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant notes that most temperature sensor ICs are limited to around 150°C and requests suggestions for alternatives that can withstand higher temperatures.
  • Another participant suggests using a thermocouple as a potential solution for high-temperature measurement.
  • A different participant proposes a non-contact infrared (IR) optical temperature sensor as another option.
  • One participant mentions that in their industrial experience, "J" or "K" thermocouples are commonly used, with "K" being the most prevalent for high temperatures, and suggests an RTD for temperatures near the boiling point of water.
  • Another participant raises a concern about the feasibility of using an IC at such high temperatures, implying that if an IC is too hot to touch, it may indicate a heat sink issue or a malfunctioning IC.
  • A later reply challenges this concern, stating that the original poster is looking for a sensor that can measure high temperatures rather than remove heat from a component, and emphasizes that 350°C is not near the boiling point of water.

Areas of Agreement / Disagreement

Participants present multiple competing views on the best approach to high-temperature sensing, with no consensus on the existence of a suitable IC or the best alternative methods.

Contextual Notes

Some assumptions about the operational environment and specific application requirements remain unaddressed, and there is uncertainty regarding the availability of high-temperature sensor ICs.

ironcross77
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most of the temp sensor ics goes upto 150 'c. can anyone suggest any ic that has upper limit of 400 'c? may be 350 'c
 
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Use a thermocouple.
 
... or a non-contact IR optical temperature sensor.
 
Both suggestions are good but in industry we use either "J" or "K" thermocouples with "K" being the most common where I work. If the temperature was around the boiling point of water I would recommend a RTD.
 
I just read you post without reading the replys. If a IC is so hot that you cannot place your finger on it for over 1 second, it is too hot! You either have a heat sink problem or a bad IC.
 
Ummm, no. He doesn't wish to remove heat away from a part that is used as a sensor to meause temperature. His problem is that he is looking for something that most likely doesn't exist. He has admitted that he is unable to find it so he has been given a couple of choices. 350 degrees is far from the boiling point of water.
 

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