Waterproof RTD PT100 Temperature Sensor - Jaybva Thermistor Probe for PID Temperature Controller 3 Wire Stainless Steel NPT 1/2" Inch Pipe Thread with Insulation Lead Shield Wire 0~500C

I have long suspected that something is amiss in this lab and this PT100 probe has enabled me to prove it!116.79, minus 0.56 for the resistance of two leads, minus 100 for 0℃.... divided by 0.385 equals..Forty two! I knew it! This coffee is cold!Seems to work okay out of the box, I've seen some other reviews doubting its longevity but only time will tell that.I particularly like the three lead arrangement, it's quite a clever way to null out the resistance of two - leads by giving you a third lead to use as a secondary current path just for measuring two of the leads.Assuming that all of the leads are pretty much identical, this gives you a pretty good idea of how much you need to subtract from the reading across +/- leads with the sensor in between.

Perfect as described, three wires works perfectly