In the permanent section about professional devices, we will tell you about Isparomer GGI-3000

The GGI-3000 isparometer is designed to measure and record evaporation from the soil and open water surface. The isparomer can be installed on a raft in a reservoir or buried in the ground on a continental and coastal water evaporation site.
The isparometer consists of an evaporator, a rain gauge, a volumetric burette and measuring tubes. The evaporator is a cylindrical tank with a conical bottom. In the center of the bottom of the tank, a metal reference tube is installed, on which a volumetric burette is installed during measurements.
In the GGI-3000 vaporometer, the water level in the evaporator is determined using a volumetric burette and a measuring tube. In addition, the precipitation captured by the rain gauge is measured using a measuring cup. In parallel with the measurements of the water level in the evaporator and the amount of precipitation in the rain gauge, observations are made for a number of hydrometeorological elements (water temperature in the surface layer of the evaporator, air temperature and humidity, wind speed, and others).
To indicate the water level in the evaporator, a needle mounted on the tube is used, the tip of which is adjusted 75 mm below the edge of the evaporator.
The rain gauge is also a cylindrical tank with a conical bottom. A funnel is inserted into the tank of the rain gauge, and a visor is soldered to the upper edge. The precipitation flows through the tube into the receiving bucket. A volumetric burette is used to extract a certain amount of water from the evaporator in order to determine the height of its level relative to the plane passing through the upper section of the reference tube.
The burette is a cylindrical cup, to the flat bottom of which a rod is attached from the outside to install the burette on the reference tube of the evaporator. At the very bottom, there is a hole in the side wall of the burette, which is tightly closed with a rubber stopper attached to the end of an L-shaped lever, you can close or open the hole in the burette. At the upper edge of the burette there is a funnel for draining water into the measuring pipe.
The measuring tube is used to measure the volume of water taken by means of a burette from the evaporator.