Tunnel visibility detector

Tunnel visibility detector Product Introduction

Tunnel visibility detectors are specially designed and manufactured for tunnels and pipe galleries for use on highways and tunnels where accurate and reliable visibility measurements are required.The Tunnel visibility detector detector operates based on the principle of transmission.The transmitter/receiver and reflector are installed opposite each other and aligned using a bracket.The highly focused beam emitted by the optical components becomes a detection beam.The installation distance is 3 meters (round trip dual-path, actual detection optical path is 6 meters).Due to dust attenuation, the receiver processes the received signal into a measurement value.It is installed on the tunnel ceiling or sidewall according to my country's "Specifications for Ventilation and Lighting Design of Highway Tunnels".

This intelligent detector has a built-in compensation function.When the optical lens is contaminated, it automatically performs gain compensation, thus ensuring a longer maintenance cycle.Tunnels are special tubular structures.Due to their small space and enclosed nature, exhaust fumes emitted by vehicles passing through tunnels, if not promptly and properly discharged, can cause the accumulation of CO and suspended particulate matter, directly affecting the personal safety of drivers, passengers, and maintenance personnel.

The SDN1 series is designed to collect VI/CO data online, providing it to traffic regulatory departments to provide decision-making basis for tunnel ventilation and road safety.

Tunnel visibility detector Product Features

1.Can simultaneously or separately measure visibility (VI) and carbon monoxide (CO);

2.High-resolution visibility measurement;

3.Measurement is completely unaffected by stray light sources;

4.Specifically designed for harsh tunnel environments;

5.Effectively avoids measurement failures caused by environmental factors and vibrations from passing vehicles;

6.Low installation, startup, and maintenance costs;

7.Built-in status display, fault alarm, and data storage functions for easy debugging and equipment maintenance;

8.Multiple output modes for convenient data acquisition;

9.Unique compensation function ensures a longer maintenance cycle;

10.Non-contact, continuous visibility monitoring;

11.Utilizes the latest microprocessor technology for fully digital operation.

Tunnel visibility detector Technical Parameters

Installation Method: Wall-mounted

Power Supply: AC 90-305V

Measured Values: VI value: 1/m,

CO concentration: PPM

Measurement Principle: Light projection method

Measurement Range: VI: 0--35×10-31/m,

CO: 0--1000PPM

Measurement Distance: 6-meter optical path (probe installation distance 3 meters)

Accuracy: VI: ±0.0001 1/m,

CO: ±1PPM

Output Interval: 10 seconds

Digital Output: RS485

Analog Signal Output: 3 channels 0/4mA-20mA (internal impedance not greater than 500Ω)

Data Update Rate: 6/min

Reliability: Mean Time Between Failures (MTBF) not less than 5000 hours

Automatic Compensation Function: VI has self-calibration and automatic zero-point function

Power Consumption: <15W

Ambient Temperature: -40~+75℃

Air Humidity: 0~100%RH