1. Solution Background:

Ten units under Huaneng Mengdong Company—including Yimin Coal-Electricity Company—operate across diverse sectors such as coal-fired power, thermal energy, and new energy, requiring real-time online detection of various toxic and harmful gases. The operational environments are complex; some detection points are located underground or in confined spaces like valve pits, presenting major safety risks such as poisoning or explosions caused by gas leaks. The client required a highly reliable and cost-effective online gas detection system capable of real-time monitoring, linked alarm responses, and centralized control to ensure production safety.

2. Parameter Requirements:

3. Solution:

Based on on-site operating conditions, the GTYQ-MIC-500S gas detector (magnetic wand version) and MIC3000 bus-based controller were selected to meet requirements for explosion-proofing, interference resistance, and long-distance signal transmission.

Level 1 Warning (concentration reaches preset value): Controller triggers a pop-up alarm; on-site audible and visual alarms activate, prompting personnel to investigate.

Level 2 Warning (concentration reaches a higher threshold): Can trigger interlocks with external equipment such as exhaust systems and shut-off valves (subject to on-site integration capabilities).

The project covers 10 branch plants, utilizing a total of 351 detectors and over 20 controllers to achieve unified monitoring and centralized management.

4. Products Used:

Gas Detector:

GTYQ-MIC-500S (Magnetic Wand Version)

Target Gases: CH₄/O₂/H₂S/CO (any combination of four gases available upon request)

Output: RS485 / 4–20mA

Features: Explosion-proof, integrated audible/visual alarm, wireless remote control, Chinese language display

Gas Alarm Controller:

MIC3000

Network Capacity: 150 RS485 channels

Functions: Color touchscreen, multiple relay outputs, alarm log storage, Ethernet communication