👉 An ozonometer is a device used to measure the volume of liquid in a container. It consists of a cylinder or other vessel with a hole at one end, and a fluid-filled tube that can be inserted into the cylinder through the hole. The fluid-filled tube is connected to a pressure gauge or another device for measuring the pressure inside the cylinder. The term "ozonometer" comes from the Greek word "ozone," which means "air." In physics, an ozonometer is