PT1000 temperature sensor code

Other Hardware Sensors
1

Hi

I'm currently working at a project to repair my dishwasher, which has a fault in the heating circuit. I am very novice on programming and electronics, but I managed to code a kind of "Thermostat" with a TMP35. It has to heat when the water temperature is below 50°C. (some conditions included)

As a TMP35 is not that suitable for liquid readings a bought a PT1000 (quickly), without doing the proper research thinking it would be just as simple to work with. Now I'm blown away. I've found this article:
http://openenergymonitor.org/emon/buildingblocks/rtd-temperature-sensing

But that info goes way above my head, same as all other info available. Now my question is, can I use the sensor and arduino to just measure that one temperature needed for my project? Accuracy can be fairly low.

Thanks in advance!

2

You can encapsulate the TMP35. But you have to do it right, so water can not get in near the wires. Perhaps some shrink tube with resin. Or glue resin around the soldered wires, and encapsulate it all with ms-polymere sealant.

You can use the PT1000 for a single temperature.
Use a 1k resistor to 5V, the PT1000 to ground and read the voltage over the PT1000.
Dip it in the right temperature, can read the analogRead() value.
You could use a table in the Arduino for a larger range a temperature measurements.

Why not use both sensors ?

3

Hi

Thanks for your answer! I've been thinking of incapsulating the sensor but the problem is I'm going to drill a hole somewhere in the water circuit. In this case the perfectly round PT1000 sensor can create a better sealing against leaks.

I'm going to measure the corresponding value for 50°C and program that. Realy a shame if I see what the sensor's capabilities are. In time I can switch it for a cheaper one.