Review on 🌡️ Comidox MAX31865 PT100/PT1000 RTD Temperature Thermocouple Sensor Amplifier Board Temperature Detector Module for Arduino - (1 Unit) by Jonathan Abreu

After soldering the cap. I carefully tested the 3 pads to ensure they would fit my 3 wire PT100 RTD. I was happy to see that they were already set up and that the solder was spilled on all the pads, not just the bridged pads. I installed the RTD connectors and connected the RTD wires. These screw connections are not of high quality. I had to open the hole slightly to allow the wire to go all the way through. I tested both and got -403 degrees Fahrenheit. Pretty sure the room wasn't somewhere around -403 degrees, I checked the installation for errors and found that both modules were faulty and the RTDs were fine. A few days later I decided to take a closer look at the boards. Guess what? At higher magnification I noticed a tiny trace between the pads of "24 3"! The solder on the pads obscured the thin trace and made it appear exposed. I quickly cut the track and you know what? Both work. Incidentally, these boards can be configured for 2, 3, or 4-wire RTDs. The "431" resistor allows the board to work with PT100. "4301" will make it work with PT1000.