How does a portable gas detector provide an alarm for hypoxic environments during subway tunnel construction?
(1) Real time monitoring of oxygen concentration
The Yiyuntian portable gas detector can continuously and accurately monitor the oxygen content in the environment of subway tunnels. Under normal atmospheric conditions, the oxygen concentration is about 20.9%, and once the detector detects that the oxygen concentration drops
below a safe threshold, such as 19.5%, it will immediately trigger the alarm system.
(2) Set alarm threshold
The detector allows users to preset alarm thresholds for oxygen concentration based on specific safety standards. When the oxygen concentration in the tunnel reaches or falls below this preset value, the instrument will immediately emit a strong alarm signal through loud sounds and prominent lights, thereby promptly warning construction personnel to pay attention to the risk of oxygen deficiency.
(3) Data transmission and linkage
Some advanced portable gas detectors are also equipped with data transmission functions, such as interconnection between devices through LoRa wireless communication modules. When a device detects an oxygen deficient environment, it can quickly send warning information to other devices within a certain range, building a dynamic security protection network. In addition, these detectors can also transmit data in real-time to a remote monitoring center, allowing management personnel to monitor the gas conditions inside the tunnel at any time and quickly take response measures.
(4) Collaborate with other devices to work together
In the comprehensive monitoring plan for subway tunnel construction, portable gas detectors can form a linkage mechanism with fixed gas detectors, ventilation systems, and other equipment. Once the portable detector issues an oxygen deficiency alarm, it can automatically activate the ventilation equipment to perform forced ventilation until the oxygen concentration in the tunnel returns to a safe level.
