The-tunnel ventilation control and monitoring system is introduced. The contents include the basic technical requirement, control principle, monitoring parameters and implementation.

介绍隧道通风控制与监测系统，包括基本技术条件、控制原理、监测参数和实施。

youdao

The intelligent monitoring instrument is able to find out hidden dangers in coal mine ventilation system through the monitoring of underground air pressure, air velocity and temperature, etc.

该智能监测仪通过对井下风压、风速、温度等参数的监测，找出煤矿通风系统存在的隐患。

youdao

Burning type catalyzing gas sensors are the devices of the gas monitoring system in coal mines, which realizes the auto on-off of the ventilation system based on detecting the gas volume fraction.

热燃烧式催化瓦斯传感器是煤矿矿井瓦斯监控系统的核心部件，用于检测瓦斯体积分数，实现风电闭锁功能。

youdao

Ventilation and air monitoring equipment has been installed inside the culvert for workers who will be removing the debris.

BBC: Tyne & Wear

The first job is for the environmental assistant and the gas checker to walk through the tunnels monitoring ventilation and air quality.

CNN: A day in the life of trapped Chile miners