Which tunnel environment testing equipment is good, which one is professional, which one is safe, reliable and cost-effective?

模拟输出：

2通道：0，2，4～20mA，隔离输出，最大负载1000欧

电源：

AC76～265V 50HZ

继电器输出：

CO故障；VI故障；维护/污染/报警指示

The left and right installation diagram of the detector on-site. The tunnel is a special tubular structure. With the increase in traffic volume, the concentration of smoke, diesel exhaust gas, and carbon monoxide continues to rise. They not only cause harm to the environment, but also affect the visibility in the tunnel. If they are not discharged in a timely and reasonable manner, they will directly bring danger to people and traffic. . R
is a device designed to collect online data in tunnels and provide it to the traffic monitoring department to provide reliable basis for tunnel ventilation and road traffic. The analyzer consists of a transmitter/receiver unit and a reflection unit. The installation distance is meters or meters, and the total optical path after reflection is meters or meters. The light beam is attenuated by the dust, and the signal is obtained and processed into a measured value by the evaluation unit. The analyzer automatically compensates for the effects of contamination and long-term drift. The negative gas absorption correlation method is used to measure the concentration at the absorption peak of the undetermined infrared absorption spectrum wavelength .. micron.
R The detector is not affected by environmental interference light and has self-test and automatic calibration functions.
Measuring range
=~/~~(optional)
Working temperature
℃～+℃
Measuring accuracy
/
Working humidity
~R, no condensation
Protection level
Status display
Equipment status D display
Analog output
Channel: ~, isolated output, maximum load ohm< br/> Numerical display
Real-time display of measured value D
Power supply
~
Alarm function
Sound and light alarm, alarm valve can be set
Digital interface< br/> R/R/R (optional)
Relay output
Fault fault maintenance/contamination/alarm indication
Digital input
Max, external maintenance switch
Response Time
Seconds
Technical indicators
Product features
Equipped with scalable nitrogen oxide detection function.
Mean time between failures in hours.
The equipment comes with status display, fault alarm and data storage functions to facilitate debugging and equipment maintenance.
Zero point compensation function, multiple output modes.
The analysis part can display the measurement curve.
Split Large Tunnel Detector