Temperature Sensor advice

Hi All

I am looking to build a device that will let me test the temperature of products inside a fridge and freezer.

Can anyone recommend good temperature sensors for this? I know I can buy an infrared thermometer and save the hassle but this will be the start function of a multi tool proof of concept I am desining , the sensor needs to be accurate, +/- 1 degree Celsius. It also has to be able to deal with liquid if it's a touch based sensor.

Cheers

Druid

https://www.adafruit.com/product/381

1druid1: I am looking to build a device that will let me test the temperature of products inside a fridge and freezer.

You plan to actually stick probes into those products? An IR sensor would read only the surface temperature of a product, which may be quite different from the bulk of the product.

Anyway, the easiest is to use wired sensors, and just lead the wires through a hole in the door or the side of the fridge.

+1 for the waterproof DS18B20 probe

Why make a hole in the fridge? The wires can be thin enough that the door seal will close adequately.

The wires can be thin enough that the door seal will close adequately.

That is how my freezer monitor is done. 3 conductor, 28 AWG flat cable causes no significant leakage.

Hi, Will the sensor be coming in contact with food? If so you will need food grade sensors, specifically designed for the food industry. I think you will find some health regs about it.

Tom.. :)