SF6 Gas Quantitative Leak Detector

Model: HMJ-9051-SJ

1. Product Introduction

The SF6 Gas Quantitative Leak Detector adopts the negative ion capture principle, featuring high sensitivity, excellent stability, fast response, easy operation, and wide mobility. It enables rapid and accurate quantitative detection of leakage points and annual leakage rates in SF6 circuit breakers and GIS combined electrical equipment.

This instrument is highly suitable for power supply departments, installation and maintenance units, and electrical testing institutes. It is also ideal as a supporting tool for SF6 high-voltage switchgear manufacturers, especially for SF6 electrical equipment and export products.

 

2. Features

• Quantitatively detects trace SF6 gas concentration in ambient air.
• Accurately locates SF6 gas leakage points in equipment.
• Measures the concentration of SF6 gas diffused in the surrounding air.
• Quantitatively measures leakage volume and leakage rate of SF6 equipment.
• Compact and lightweight, equipped with a portable handheld flexible probe and extendable test cable.
• Wide measurement range, capable of detecting SF6 leakage within the leakage rate range of SF6 switchgear.
• High accuracy, using advanced calibration methods to provide highly accurate calibration curves, enhancing detection reliability and precision.
• Intuitive display with audible and visual alarms, featuring a digital LCD with backlight for clear readings.
• Fast response and short recovery time, thanks to the new circuit design, greatly facilitating field testing.
• Rechargeable lithium-polymer battery with long usage time, supporting up to 12 hours of continuous operation — ideal for engineering sites, SF6 high-voltage switch manufacturers, and research institutes.

 

3. Main Specifications

Product	Item	Technical Parameters
SF6 Gas Quantitative Leak Detector	Resolution	1 ppm
	Detection Range	0~2000 ppm
	Response Time	< 3 seconds
	Recovery Time	< 3 seconds
	Reference Error	≤ ±10%
	Repeatability Error	≤ 5%
	Indication Mode	LCD display and multi-frequency sound alarm
	Detection Length	Handheld flexible probe, test cable extendable up to 1 meter
	Continuous Operation Time	12 hours
	Power Supply	Rechargeable 4-cell lithium-polymer battery, DC 5V
	Operating Environment	Temperature: -25°C to 50°C; Relative humidity: ≤95%, non-condensing
	Total Weight	0.8 kg
	Dimensions	230mm × 130mm × 46mm

Frequently Asked Questions about SF6 gas quantitative leak detector

What is the SF6 gas quantitative leak detector (HMJ-9051-SJ) used for?

The SF6 gas quantitative leak detector — model HMJ-9051-SJ is designed for quantitative detection and localization of SF6 gas leakage. It is deployed in GIS substations, SF6 circuit breakers and switchgear rooms, where it gives maintenance teams continuous or periodic visibility of insulation condition so that defects can be identified before they develop into unplanned outages.

What is the detection range of the HMJ-9051-SJ?

According to the published specification, the detection range is 0~2000 ppm. This figure is measured under the reference conditions stated in the product datasheet; for project-specific acceptance criteria please refer to the type test report supplied with the quotation.

How does quantitative detection differ from a simple leak alarm?

A simple alarm only tells you that gas is present above a threshold. The HMJ-9051-SJ is a quantitative instrument: it measures the leak and expresses it in engineering units (this model: 0~2000 ppm), so the result can be logged, trended over time and compared with the manufacturer’s allowable leakage rate. That trend is what lets a maintenance team plan a top-up or a repair instead of reacting to an alarm.

How is the SF6 gas quantitative leak detector powered and how does it communicate?

The HMJ-9051-SJ uses the following interface configuration: power supply is Rechargeable 4-cell lithium-polymer battery, DC 5V. This allows the same device to be fitted in both retrofitted installations and new builds; the exact combination is confirmed at order stage against the site communication architecture.

Is installation possible without an outage?

In most cases yes. Because the SF6 gas quantitative leak detector is installed on the equipment while it remains energised, the work is normally carried out as a live-line operation by qualified personnel following the site safety rules. Where a sensor must be coupled to an earthed screen, bonded connection or gas compartment, a short outage may be required — this is confirmed during the site survey.

Does HUWOR support OEM/ODM and what is the delivery lead time?

Yes. Zhuhai Huawang Technology Co., Ltd. supplies the SF6 gas quantitative leak detector under its own brand and also supports OEM/ODM supply, including private labelling, custom firmware functions and integration with the customer’s monitoring platform. Standard units are typically quoted with a lead time confirmed at order stage depending on quantity and configuration; sample and pilot orders are supported.

Applications

The SF6 gas quantitative leak detector is used for quantitative detection and localization of SF6 gas leakage. Typical installation sites include GIS substations, SF6 circuit breakers and switchgear rooms. It is applied both on new assets, where the monitoring function is built into the asset from the start, and on existing assets where it is retrofitted to extend the information available to the maintenance team.

How it works

The instrument converts the physical quantity of interest into an electrical signal, conditions and digitises that signal in the field unit, and passes the result to the monitoring platform or to the operator. Condition assessment relies on the trend rather than on a single reading: the value recorded today is compared with the commissioning value and with the historical series for the same measurement point, and it is the direction and rate of change that indicate whether the asset is degrading.

Installation and commissioning

Installation follows three steps: a site survey to confirm the mounting position, the communication path and the power arrangement; mechanical fitting of the sensor or the use of the instrument on the test point; and finally commissioning, where the readings are verified against a reference and the alarm thresholds are set.

For this model the relevant interface conditions are: power supply Rechargeable 4-cell lithium-polymer battery, DC 5V.

Standards and documentation

Type test reports, calibration certificates and installation documentation are provided with the supply. Where a project requires the equipment to be verified against a specific national or utility standard, the applicable clauses should be stated in the enquiry so that the test scope can be confirmed at quotation stage.

Frequently Asked Questions about SF6 gas quantitative leak detector

What is the SF6 gas quantitative leak detector (HMJ-9051-SJ) used for?

The SF6 gas quantitative leak detector — model HMJ-9051-SJ is designed for quantitative detection and localization of SF6 gas leakage. It is deployed in GIS substations, SF6 circuit breakers and switchgear rooms, where it gives maintenance teams continuous or periodic visibility of insulation condition so that defects can be identified before they develop into unplanned outages.

What is the detection range of the HMJ-9051-SJ?

According to the published specification, the detection range is 0~2000 ppm. This figure is measured under the reference conditions stated in the product datasheet; for project-specific acceptance criteria please refer to the type test report supplied with the quotation.

How does quantitative detection differ from a simple leak alarm?

A simple alarm only tells you that gas is present above a threshold. The HMJ-9051-SJ is a quantitative instrument: it measures the leak and expresses it in engineering units (this model: 0~2000 ppm), so the result can be logged, trended over time and compared with the manufacturer’s allowable leakage rate. That trend is what lets a maintenance team plan a top-up or a repair instead of reacting to an alarm.

How is the SF6 gas quantitative leak detector powered and how does it communicate?

The HMJ-9051-SJ uses the following interface configuration: power supply is Rechargeable 4-cell lithium-polymer battery, DC 5V. This allows the same device to be fitted in both retrofitted installations and new builds; the exact combination is confirmed at order stage against the site communication architecture.

Is installation possible without an outage?

In most cases yes. Because the SF6 gas quantitative leak detector is installed on the equipment while it remains energised, the work is normally carried out as a live-line operation by qualified personnel following the site safety rules. Where a sensor must be coupled to an earthed screen, bonded connection or gas compartment, a short outage may be required — this is confirmed during the site survey.

Does HUWOR support OEM/ODM and what is the delivery lead time?

Yes. Zhuhai Huawang Technology Co., Ltd. supplies the SF6 gas quantitative leak detector under its own brand and also supports OEM/ODM supply, including private labelling, custom firmware functions and integration with the customer’s monitoring platform. Standard units are typically quoted with a lead time confirmed at order stage depending on quantity and configuration; sample and pilot orders are supported.

Applications

The SF6 gas quantitative leak detector is used for quantitative detection and localization of SF6 gas leakage. Typical installation sites include GIS substations, SF6 circuit breakers and switchgear rooms. It is applied both on new assets, where the monitoring function is built into the asset from the start, and on existing assets where it is retrofitted to extend the information available to the maintenance team.

How it works

The instrument converts the physical quantity of interest into an electrical signal, conditions and digitises that signal in the field unit, and passes the result to the monitoring platform or to the operator. Condition assessment relies on the trend rather than on a single reading: the value recorded today is compared with the commissioning value and with the historical series for the same measurement point, and it is the direction and rate of change that indicate whether the asset is degrading.

Installation and commissioning

Installation follows three steps: a site survey to confirm the mounting position, the communication path and the power arrangement; mechanical fitting of the sensor or the use of the instrument on the test point; and finally commissioning, where the readings are verified against a reference and the alarm thresholds are set.

For this model the relevant interface conditions are: power supply Rechargeable 4-cell lithium-polymer battery, DC 5V.

Standards and documentation

Type test reports, calibration certificates and installation documentation are provided with the supply. Where a project requires the equipment to be verified against a specific national or utility standard, the applicable clauses should be stated in the enquiry so that the test scope can be confirmed at quotation stage.