Noz Posted June 28, 2021 Share Posted June 28, 2021 (edited) @Mike2JZ question I'm hoping you can help me with buddy. But anyone else with input is welcome. Most datasheets I'm finding for air intake sensors seems to all use 5v low side voltage to sensors but have similar resistance values for temperature readings. Are iat sensors often giving the same resistance depending on temperature. I suppose I assumed there would be different resolutions of resistance depending on sensors. Though I guessed it would only be 5v typical voltage. Edited June 28, 2021 by Noz (see edit history) Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted June 28, 2021 Share Posted June 28, 2021 Most IAT’s I’ve used are all 5v sensors that require a 1k pull-up resistor wired inline or built into ECU to read signal properly. I don’t often look at the data sheets with regards to the resistance of the sensor as most ecus I use read and display temperature based on volts. got any examples of what you have been looking at? Quote Link to comment Share on other sites More sharing options...
Noz Posted June 28, 2021 Author Share Posted June 28, 2021 Thanks for the quick reply mate. How do you setup the voltage for the temperature. Is there an adjustment for the range when setting the sensor up, or do you would just choose the sensor. I'm hoping the range of the sensor would just be spread over its 5v capability. I've attached a sheet I found for one. But I was unable to find a purchasing source for it online. Which led to me think surely they can't be that different. Not what I'd call a datasheet, more like a spec sheet. Guessing I'd just divide the range across its 5v. inlet-air-temperature-iat-sensors.pdf Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted June 28, 2021 Share Posted June 28, 2021 (edited) Typically sensor manufacturer will publish something like this for the resistance of the sensor. This is for a standard bosch temp sensor The same sensor is expressed in volts like so: If you don't have a datasheet to get values from then you will need to test sensor manually by heating it up using hot air / liquid, using a thermometer to gauge temperature. Whilst doing this you can measure volts or resistance on the sensor and making note of the values as you increase/decrease temperature through the range. Edited June 28, 2021 by Mike2JZ (see edit history) Quote Link to comment Share on other sites More sharing options...
Noz Posted June 28, 2021 Author Share Posted June 28, 2021 Great, thanks mate. Because I've some electronics background I was looking for the wrong information really, over complicating things as usual! I've found a few sensors and indeed the calibration ranges with them. As always, thanks for your guidance mate! Quote Link to comment Share on other sites More sharing options...
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