Difference between Thermopile and Bolometer

What is the difference between Thermopile and Bolometer?

Thermopile as a noun is an electronic device that converts thermal energy into electrical energy. usually constructed using a series-combination of thermocouples. while Bolometer as a noun is a sensitive device for detecting and measuring the energy of electromagnetic radiation

We hope you now know whether to use Thermopile or Bolometer in your sentence.