Shenzhen Lida brightness detector special brightness detection equipment outside and inside the tunnel

Introduction to Lida brightness detector:
The shell of the light intensity detector is made of aluminum alloy, and the protection grade reaches IP68
The use of internal 24V heater can minimize the influence of temperature factor on the photocell composed of silicon photodiode
When the probe detects the change of brightness and illuminance, the extremely weak photocurrent is obtained through the amplifier system, and then the output signal is corrected by sine (illuminance) or cosine (brightness) through the balance of the bridge and the use of the filter, so as to obtain the correction value of brightness and meet the needs of human vision Technical parameters of Lida tunnel brightness detector:
Measurement range: illuminance detector in tunnel 0 ~ 20000lux&# 61656; Power supply: AC100 ~ 250V, 50Hz  Accuracy of illumination measurement in tunnel: & le& plusmn; 0
1 Lux Transmission interface: 2 channels, 0 / 2 / 4 ~ 20mA; Isolated output, load 1000 Ω  Data storage: local data storage is more than 72 hours  Status display: LED display of equipment status, equipment fault alarm function  Value display: LCD real-time display of measured value  Mean time between failures: & Ge; 50000 hours  Protection level: IP68 Temperature control: 24V AC, 20W (adjustable)  Operating temperature: - 50 ℃ ~ + 70 ℃  Operating humidity: 0～100% Power , 76-265V AC  50Hz digital interface , RS232 / RS422 / RS485 data bus