Technical Antifreeze / Thermostat Experiment - possible or not?

[g8rpi]

The method of applying heat does of course matter depending on the application. Car thermostats are designed to be immersed in liquid at relatively low rates of change of temperature. The only way to test them properly is to immerse them in hot liquid. Hot air has a low thermal capacity and you are likely to have the air much hotter than the set point of the thermostat and thus cause un-even heating. IR would be totally useless. I've never seen a hot airgun with a PID controller and it would not help much as the sensor is not on the object being heated. Heating water / glycol to boiling is not partucuarly dangerous (unless you boil off all the water) and most normal people have a sauspn and stove. The closest thing most have to a hot air gun is a paint stripper and those are not easy to control.

A pressure chaamber is totally over the top and the only common type, a pressure cooker, is useless becuse you can't see into it.
GrandePunto PL
I'm not sure what it is you have against professional engineers (yes I am one) but in this case you are wrong.
Be aware of the forum rules https://www.fiatforum.com/rules.html
A dislike is the lowest level of censure.

Robert G8RPI.

 

[PuntoHowTo]

Is this a technical forum or we judge "average Joe" skills (and if he'll do any damage)?
Erase all forum Guides then (all potentially "dangerous" if performed wrong).

Technically speaking, heat source does not matter much - it's the way you use it, apply it and control it.
"Primitive" sources like fire, hot air, IR (infrared) are still in use, in the serious industrial applications.
And the temperature is controlled well (any PID controller will do +/- 1 degree).
I know, it's too complicated for most of you to grasp (what's technically possible and what's not), so it's easier to ridicule the idea/concept.

Still got a problem? Give me a 10 dislikes, minimum! That's all you can do about it (politically correct sissies).

Well firstly this is not a technical forum, I’m not sure where you think you are but this is a forum for enthusiasts and hobbyists, not that it really matters as there are people on here who are engineers and scientists, people with proper qualifications and while I don’t normally agree with g8rpi he does have a good few more initials after his name than I do. Both of us have done our time in engineering and in this instance we are in agreement, you are just plain wrong.

It has nothing to do with safety, you wanna blast yourself with a hot air gun feel free if you burn your hands sufficiently it might stop you posting a load of nonsense. If you want to accurately test a thermostat you need to control the conditions. Hit it with a heat gun the metal on one side maybe hotter than the other. The wax may heat up more against the body and the middle be cold. You need to control the temperatures accurately.

What you’re suggesting is what an amateur in a shed who don’t know what they are doing, might try, “blast it with a hot air gun, that’ll be alright” with all the accuracy and finesse of a caveman bashing a rock with a club.

If you were testing thousands at a time in say a factory then you might want to make something a bit more fancy. But in this instance for a one off, a pan of boiling water and a thermometer has worked perfectly well for decades.

Ironic you should get so sensitive about someone pointing out you’re wrong and yet reply by calling someone else a “sissy” you don’t have to take things so much to heart, it’s not you’re fault if you don’t know you’re wrong, that’s why we’re hear to help you out. Now try and man up a bit there’s a good chap

 

[everson38]

Hey guys.

So in the end I went with the oil and pan method. Was interesting to see a thermostat working. The oil pan method allowed me to control thinks more. I.e turn up or lower the heat. These thermostats have a high (or higher compared to the norm) seems that this thermostat opens up at around 103 - 109 degrees. Where as my punto one that I changed a few months is around 80ish (can't exactly remember). Again just meant as a bit of curiosity and interest. Thanks again.