Is detergent polar or non polar ?

Both

Explanation: Detergents are commonly available as powders or concentrated solutions. Detergents, like soaps, work because they are amphiphilic: partly hydrophilic (polar) and partly hydrophobic (non-polar). Their dual nature facilitates the mixture of hydrophobic compounds (like oil and grease) with water.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.