Review on 🌡️ Low Temperature Liquid Thermometer - Pensky Martens Immersion B60750 0500 by Juan Castillo

I use this to test the accuracy of my simple digital thermometers for my reef aquarium. The scale is ideal for this. When I add some room temperature water to 80 degree reef water, I see the liquid move rapidly and stabilize in the thermometer within seconds. It comes in a plastic tube which can be used for storage as the glass is thin and fragile.