Thermometer Accuracy

[ozy]

Hi, Today, I was doing a simple maintanence of my tank and was noticing my digital thermometer reading 26.8 degrees. However, the water did not feel like 26 degrees. So I took another digital thermometer from another tank and a legacy alcohol thermometer from my fresh water days to test.

To my horror, the other thermometer shows 30.2 degrees and the alcohol thermometer shows 28 degrees.

Now I am at a loss as how to accurately determine the temperature of my tank.

Any recommendations for a good thermometer?

[Achilles Tang]

I use a lab-grade mercury thermometer which I calibrate all my other thermometers to.

I think there is a medical supply shop in Balestier that sells them.

[ozy]

Ah, thanks AT. Is it near the Nature Aquarium?