Lactometer Zeal Type is a type of lactometer, which is a device used to measure the specific gravity or density of milk. The Zeal Type lactometer is a type of floating lactometer, which works on the principle of buoyancy.
The Zeal Type lactometer consists of a glass bulb with a graduated stem and a weighted base. The bulb is filled with mercury or lead shots, which help it float in milk. The stem is graduated with a scale from 0 to 40, with 0 being the point where the bulb is just floating in water, and 40 being the point where the bulb is just touching the bottom of the container