[Efficient measurement] This solar energy tester does not need to be adjusted to directly measure, long-term stable measurement [Function] This solar radiation energy tester supports the maximum hold function and data hold function [Wide use] This solar radiometer is widely used in solar radiation measurement, solar energy research, meteorology, agriculture, physics and optical experiments [Fast sampling speed] Digital display sampling rate: 2 times/sec [LED backlight] Large LCD screen, bright backlight, more convenient to read data