1、 Product Overview

Tunnel illuminance detector is a precision instrument used to monitor the brightness of light inside tunnels. Based on changes in the illuminance inside the tunnel, the measured value is converted into a 485 signal and output to the tunnel control system, which is linked to the lighting equipment for intelligent control. When in use, it is installed on the wall of the tunnel entrance section, transition section or middle section, at a height of about 3 meters. It can accurately reflect the road illumination situation and ensure safety. Usually used in conjunction with an external brightness detector. The instrument uses high-precision silicon photovoltaic cells as sensing elements. The optical signal is converted into an electrical signal by a professionally designed cosine corrector and a specially designed high-efficiency filter, and then processed by a highly integrated circuit to output a 485 signal.

2、 Product Features

The photovoltaic cell is calibrated at room temperature of 25 ℃, and the error is automatically corrected to<± 1% during actual operation.
The linear relationship between brightness and photocurrent is good, and it can respond instantly to changes in light.
Multiple output modes to choose from, supporting RS485 and wired/wireless network communication.
● Automatic temperature compensation with low temperature drift.
Waterproof and dustproof design, able to withstand rain and direct water flushing.
Internal heating function, allowing for the formation of internal moisture.

3、 Technical indicators