Before the emergence of evaporation sensor, the calculation methods of water surface evaporation can be roughly divided into two categories.
One is theoretical calculation method, the other is empirical calculation method.
The so-called theoretical calculation methods are those with strong physical basis, such as heat balance method, aerodynamic method and water balance method.
These calculation methods use the principles and theories of heat balance, aerodynamics and water balance respectively to determine water surface evaporation.
Theoretical calculation methods mainly include heat balance method, aerodynamics method, synthesis method and water balance method.
The empirical calculation method is generally used to estimate the water surface evaporation based on the measured data with the empirical formula when the accuracy of the measured data is not very high.
In addition, there is a more common method, that is, measurement method. The amount of water evaporating from the water surface per unit time is called the surface evaporation rate, measured in millimeters per day.
Water surface evaporation can be determined directly by instrumental observations or estimated. Evaporation of large water bodies is determined by multiplying evaporation measured by various evaporators by conversion coefficients.
The conversion coefficient varies with the size of evaporator, season and climate zone. But now we have something that’s even more accurate: an evaporation sensor.
JXCT water evaporation sensor is an instrument used to observe water evaporation. The product adopts double layer stainless steel structure design.
It can prevent evaporation error caused by direct sunlight and has better measurement accuracy.
The sensor applied pressure measurement principle, by measuring the change of liquid weight in the evaporation dish, and then calculated the height of the page, so as to measure evaporation.
Can adapt to all kinds of environment of water evaporation measurement, not affected by liquid freezing.
It overcomes the defects such as inaccurate measurement when the liquid level is frozen, easy damage to the sensor when there is no water and low measurement accuracy.
The equipment adopts imported pressure sensor, which has passed many certifications at home and abroad to ensure that the linearity of the sensor reaches enough standards.