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HF-W-705 SF6 Gas Leakage Monitoring
This system realizes all-weather real-time monitoring of indoor SF6 gas leakage concentration in power rooms. It triggers audible and visual alarms once the limit is exceeded, preventing toxic gas hazards and ensuring safe operation of substation equipment and staff safety.
One-year warranty on exported units
Payment terms agreed per order
Lead time confirmed per order
Send your requirements, we will quote for you within 12 hours
SF6 Gas Leakage Monitoring continuously detects SF6 concentration and gas leaks inside distribution substations. It delivers instant over-threshold alarms to eliminate toxic gas risks, protect on-site workers and maintain the reliable operation of high-voltage power equipment.
Functional Features
- High Detection Accuracy: Equipped with advanced infrared sensors, boasting superior measuring precision and extended service life.
- Dual Communication Modes: LoRa wireless communication and RS485 wired communication are available between sensors and the main unit, adapting to various complex on-site installation conditions.
- 21-inch Large Display Screen: The main unit is fitted with a 21-inch color touch screen for intuitive viewing of operating status; the streamlined interface enables easy operation.
- Historical Data Recording: The main unit comes with large-capacity storage to allow quick retrieval of historical records.
Configuration List
| No. | Product Name | Functional Features |
|---|---|---|
| 1 | SF6 Gas Leakage Monitoring Main Unit | Adopts high-performance CPU, easy to operate, supports multiple data upload modes |
| 2 | 4-in-1 SF6 & O₂ Monitoring Sensor | Precisely measures various gas parameters and uploads data |
| 3 | Fan Controller | Controls start and stop of multiple ventilation fans |
| 4 | Audible and Visual Alarm | Works with the main unit to send flashing light alerts |
| 5 | Infrared Induction Device | Detects personnel entry into the room |
| 6 | Signal Repeater | Receives sensor signals and amplifies signal transmission |
| 7 | LED Display Screen | Scrolls real-time operational information continuously |
Working Principle of SF6 Gas Leakage Monitoring
The whole system adopts non-dispersive infrared (NDIR) detection principle for SF6 gas measurement, paired with oxygen monitoring, multi-signal transmission and linkage control modules.
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Gas Sampling & Detection
Distributed sensors installed indoors collect ambient air continuously. The built-in infrared sensor absorbs specific wavelength light consumed by SF6 molecules. According to Lambert-Beer law, the device calculates real-time SF6 concentration; meanwhile it detects oxygen content to prevent staff hypoxia.
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Signal Transmission
Measured gas data is transmitted to the main control host via LoRa wireless or RS485 wired communication. Signal repeaters are deployed on site to strengthen signals for long-distance and complex layout scenarios. -
Data Processing & Judgment
The main unit analyzes received gas values in real time. Once SF6 concentration exceeds the preset threshold or oxygen level is too low, the system triggers linkage logic automatically. -
Linked Execution Actions
It activates audible & visual alarms, starts exhaust fans to discharge leaked SF6 gas. The infrared sensor monitors personnel access; historical monitoring data is stored locally and displayed on the 21-inch touch screen and external LED scrolling screen synchronously.
Specification Checklist Before You Order
The same leak reads very differently depending on the room and the sampling layout. These points decide how an SF6 monitoring system has to be configured for your substation.
| Item to confirm | Why it changes the configuration |
|---|---|
| Room volume and air exchange rate | A small, poorly ventilated room reaches a given concentration far faster than a large hall; the alarm strategy has to match the room, not the gas. |
| Number and height of sampling points | SF6 is heavier than air and collects at low level, so sampling at ceiling height can read low while gas is already present where people work. |
| Alarm thresholds | Thresholds have to come from the occupational exposure limit you work to and from the GIS manufacturer guidance — not from a default value. |
| Oxygen monitoring | Because SF6 displaces air in low areas, oxygen channels are a site-safety decision taken together with the gas channels. |
| Ventilation interlock | Whether an alarm should start the extract fans automatically, and at which alarm stage, is an interlock design decision. |
| Where alarms must appear | A local sounder, the control room, or the plant SCADA — three different outputs answered by different modules. |
| Calibration and reference gas | Every infrared sensor needs periodic checking against a reference gas; the interval and who supplies the gas should be fixed at order. |
| Zoning of a large substation | In a multi-bay GIS hall the system is normally split into zones so that an alarm points to the right bay instead of the whole room. |
Send us the answers with the equipment list or single-line diagram, and the configuration can be fixed without a second site visit.
Related Systems
- Portable SF6 gas leak detector — handheld confirmation of where the leak is, once the fixed system alarms.
- Switchgear temperature monitoring — the other continuous measurement normally specified for the same GIS room.
- Circuit breaker monitoring — mechanical condition of the breakers sharing that gas compartment.
FAQ – SF6 Gas Leakage Monitoring System
Q1: What detection principle does the SF6 leakage monitoring system adopt?
It adopts high-precision NDIR infrared detection principle. The sensor identifies SF6 gas concentration through specific light absorption, ensuring stable detection, strong anti-interference ability and long service life.
Q2: What gases can this system monitor?
The 4-in-1 sensor supports real-time monitoring ofSF6 gas concentration and oxygen content in the power distribution room, which meets safety inspection requirements for high-voltage switchgear rooms.
Q3: What communication methods does the system support?
It supports LoRa wireless and RS485 wired dual communication modes. It adapts to complex on-site environments, realizing stable and long-distance data transmission between sensors and the host.
Q4: How does the system realize safety linkage protection?
When SF6 concentration exceeds the threshold or oxygen is insufficient, the system automatically triggers audible and visual alarm, and starts the exhaust fan to ventilate and dilute toxic gas, effectively avoiding safety risks.
Q5: What is the function of the infrared induction device?
The infrared sensor automatically detects personnel entering the equipment room. It cooperates with the monitoring system to enhance on-site safety management and prevent personnel from entering dangerous environments unknowingly.
Q6: What are the advantages of the 21-inch touch screen host?
The large-color touch screen displays real-time gas data, equipment status and historical records intuitively. The simple interface supports one-click query and parameter setting, with convenient daily operation.
Q7: Does the system support data storage and viewing?
Yes. The host is equipped with large-capacity storage to automatically record monitoring data. Users can quickly query historical records, which is convenient for daily maintenance and factory acceptance.
Q8: What is the role of the signal repeater?
It receives and amplifies sensor signals, solves signal attenuation problems in complex indoor environments, and ensures stable and uninterrupted system data transmission.
Q9: Is the system suitable for all high-voltage power rooms?
Yes. It is widely applicable to substations, high-voltage switchgear rooms and distribution rooms with SF6 electrical equipment, fully meeting power industry safety monitoring standards.
Q10: Does the system support real-time screen scrolling display?
Matched with an external LED screen, it can scroll and display real-time gas concentration and system working status, facilitating on-site staff to observe data in real time.
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