Safeguarding distribution room safety: Why is an SF6 gas leakage alarm system the “standard” for substations?

Date: February 17, 2026 08:51:03

In modern power systems, SF6 (sulfur hexafluoride) gas is widely used in GIS (gas-insulated totally enclosed combined appliances) and switchgear because of its excellent insulation and arc extinguishing properties. However, SF6 gas is not completely harmless: not only is it a potent greenhouse gas, but in the event of leakage it can lead to a lack of oxygen in the room, and even produce toxic decomposition products, which can seriously jeopardize the lives of staff.

In response to this pitfall.Intelligent SF6 Gas Leakage Alarm System by Inno TongdaIt became the first line of defense to guard the safety of the power industry.

I. Why do you need SF6 online monitoring in your GIS room?

  1. Invisible Hidden Dangers: SF6 gas is colorless, odorless and heavier than air, and after leakage, it is easy to accumulate in the cable trench or low-lying places, which is undetectable to the naked eye.

  2. Asphyxiation risk: Leaks can cause a drop in ambient oxygen levels and acute hypoxic asphyxiation may occur when staff enter.

  3. Statutory Requirements: Electricity safety regulations clearly stipulate that the room where SF6 equipment is installed must be equipped with environmental monitoring and forced exhaust system.

Second, the core advantages of Innotonda SF6 gas leakage alarm system

Innotopia SF6 monitoring system setMonitoring, alarming, linkage controlAll in one, with the following leading features:

1. Multidimensional environmental monitoring

The system not only accurately detectsSF6 gas concentrationIt also synchronizes the monitoringOxygen content, ambient temperature and humidity. The four-in-one transmitter ensures comprehensive and accurate data.

2. Intelligent linkage control

The system is triggered as soon as it detects an exceeding SF6 concentration (usually over 1000 ppm) or an oxygen level below 181 TP3T:

  • Audible, visual and voice alarms: Remind people inside to evacuate and keep outsiders out.

  • Forced exhaust linkage: Automatically activates the exhaust fan to quickly reduce the concentration of harmful gases and improve indoor air quality.

3. Humanized human-computer interaction

  • 7" HD touch screen: Real-time display of the data of each monitoring point, support for historical records query.

  • Voice Over: Before staff enter the GIS room, the system automatically broadcasts the current environmental status to ensure safe entry.

  • Human infrared sensing: Intelligent identification of personnel entry and exit for automated management.

4. Powerful networking and integration capabilities

Supporting **RS485, Ethernet (Ethernet)** and other communication methods, it can be easily docked to the substation integrated automation background system to realize remote monitoring and digital management.

III. List of technical parameters

  • SF6 monitoring scope: 0～3000ppm (Accuracy＜2%FS)

  • Oxygen monitoring range: 0-25% (accuracy <1%FS)

  • Work Environment: -25℃～70℃, adaptable to all kinds of complex power environment

  • Mounting method: The mainframe and sensors support wall-mounted installation, convenient construction

IV. Wide range of application scenarios

The system is widely used:

  • 110KV and above substation GIS room

  • 35KV and high voltage switch room

  • SF6 equipment storage room and laboratory

  • Cable Tunneling and Underground Power Engineering

concluding remarks

Safety is the lifeblood of the electric utility industry. SelectInotonda SF6 Gas Leakage Alarm SystemIn addition to the choice of high-precision sensor technology, but also for the front-line power workers“ life safety on a ”smart lock".

For detailed solutions, technical parameters or product quotations, please contact:

  • Phone Number: 13959168359

  • Official website: www.innotd.com

  • Manufacturer's Address: U Valley-Internet of Things Industrial Park, Fuzhou, China