SF₆ Dew Point, Purity & SO₂ Gas Analyzer with Recovery

KS30-3-R

3-in-1 SF₆ Gas Quality Measurement with Gas Recovery

The KSTONE KS30-3-R is a portable SF₆ gas analyzer designed for comprehensive gas quality testing and gas recovery during electrical equipment maintenance.

The instrument combines three essential SF₆ gas quality measurements:

• SF₆ dew point / moisture
• SF₆ purity
• SO₂ decomposition products

A built-in gas recovery function allows the tested SF₆ to be recovered after measurement, helping reduce unnecessary SF₆ emissions during routine inspection and maintenance.

The KS30-3-R is suitable for GIS, SF₆ circuit breakers, gas-insulated switchgear and other SF₆-filled electrical equipment.

Key Features

1. Three-Parameter SF₆ Gas Analysis

The KS30-3-R integrates three commonly required SF₆ gas quality tests in one portable instrument:

Dew Point + SF₆ Purity + SO₂

This allows operators to assess the moisture level, SF₆ concentration and decomposition-product condition of the gas without using separate analyzers.

2. Wide Dew Point Measurement Range

The humidity measurement module provides a dew point measurement range of:

-80°C to +20°C

The instrument also supports conversion between dew point and ppmv moisture concentration, making the test results easier to interpret according to different application requirements.

The specified accuracy is:

±0.5°C

with frostpoint output below 0°C.

3. Electronic Mass Flow Control

The analyzer uses an electronic mass flowmeter to control the sampling flow at:

0.25–0.35 L/min

The flow control is designed to maintain stable sampling conditions and reduce the influence of flow-rate variation on the measurement process.

4. SF₆ Purity Measurement

The integrated purity module measures SF₆ concentration over:

0–100% SF₆

with a response time of:

≤30 seconds

This provides a rapid indication of the SF₆ concentration inside the equipment under test.

5. SO₂ Decomposition Product Detection

The analyzer can detect SO₂, one of the key decomposition products used when evaluating SF₆ gas condition.

Measurement range: 0–100 ppm
Sensitivity: 0.1 ppm

The SO₂ measurement module is suitable for routine inspection of SF₆-filled electrical equipment.

6. Integrated SF₆ Gas Recovery

Unlike a basic gas quality analyzer, the KS30-3-R incorporates a recovery function.

After the measurement process, the sampled SF₆ gas can be recovered rather than intentionally discharged into the atmosphere.

This makes the instrument particularly suitable for maintenance environments where SF₆ emission reduction and gas recovery are important.

7. Portable and Field-Oriented Design

The compact housing measures only:

132 * 283 * 308 mm

The system supports AC/DC operation with overcharge protection and provides ≥5 hours of battery operation.

This makes the analyzer suitable for field testing at substations and other electrical equipment maintenance sites.

Measurement Functions

SF₆ Dew Point / Moisture

The humidity module measures the dew point of SF₆ gas and supports moisture conversion to ppmv.

Response Time

For measurements below 0°C, the instrument provides frostpoint output.

SF₆ Purity Analysis

The purity module measures the concentration of SF₆ in the sampled gas.

SF₆ purity measurement provides a rapid indication of whether the gas meets the required concentration level for the application.

SO₂ Decomposition Product Analysis

The KS30-3-R includes an SO₂ detection module for monitoring SF₆ decomposition products.

SO₂ measurement can be used as part of routine SF₆ gas condition assessment following operation, maintenance or fault-related inspection of electrical equipment.

Gas Recovery Function

The “-R" configuration adds an SF₆ recovery function to the gas analysis system.

During conventional gas testing, a small quantity of SF₆ is normally introduced into the analyzer for measurement. The KS30-3-R is designed to recover the tested gas after analysis.

Typical process

Electrical Equipment

↓

SF₆ Gas Sampling

↓

Dew Point Measurement

↓

SF₆ Purity Measurement

↓

SO₂ Measurement

↓

SF₆ Gas Recovery

This configuration helps reduce unnecessary SF₆ release during repeated maintenance testing.

Measurement Process

The typical operating sequence is:

Step 1 — Connect

Connect the analyzer to the SF₆ gas compartment using the appropriate gas hose and connection fittings.

Step 2 — Sample

A controlled amount of SF₆ gas enters the analyzer through the sampling circuit.

Step 3 — Analyze

The instrument measures:

• Dew point / moisture
• SF₆ purity
• SO₂ concentration

Step 4 — Record

Measurement data can be stored in the instrument and transferred through the USB interface.

Step 5 — Recover

After testing, the sampled SF₆ gas is recovered through the integrated recovery system.

System Specifications

Data Management & Reporting

The KS30-3-R supports internal storage of up to 200 measurement records.

The standard management software provides functions including:

• Measurement data management
• Test report printing
• Data transfer
• Dew point / moisture conversion
• Test result documentation

This allows test results to be retained as part of equipment maintenance and inspection records.

Probe Protection

The dew point probe is protected by a stainless steel sintered filter.

The protective filter helps reduce the influence of particles and contaminants entering the sensing element during field measurement.

This is particularly useful when testing gas from electrical equipment where the gas circuit may contain small amounts of particulate contamination.

Typical Applications

The KS30-3-R is designed for SF₆ gas quality inspection and maintenance applications including:

• GIS gas quality testing
• SF₆ circuit breaker testing
• SF₆ switchgear inspection
• Gas-insulated substation maintenance
• SF₆ gas condition assessment
• GIS commissioning
• Circuit breaker overhaul
• Routine SF₆ gas inspection
• Maintenance testing after electrical equipment servicing

Why Use a Combined SF₆ Analyzer?

A combined analyzer can simplify field testing by integrating several commonly required gas-quality measurements into one instrument.

Instead of carrying separate instruments for moisture, purity and decomposition-product testing, the KS30-3-R provides these measurements through one portable system.

The integrated recovery function further supports SF₆ emission-conscious maintenance procedures.

Technical Specifications

SF₆ Dew Point / Moisture

SF₆ Purity

SO₂

General

Frequently Asked Questions

What does the KS30-3-R measure?

The KS30-3-R measures SF₆ dew point, SF₆ purity and SO₂ decomposition products.

What is the dew point measurement range?

The dew point measurement range is -80°C to +20°C, with support for moisture conversion to ppmv.

Can the analyzer recover SF₆ after testing?

Yes. The “-R" configuration includes an SF₆ gas recovery function designed to recover the sampled gas after measurement.

What is the SF₆ purity measurement range?

The purity module measures 0–100% SF₆.

What SO₂ range can be measured?

The SO₂ measurement range is 0–100 ppm, with a sensitivity of 0.1 ppm.

How long can the analyzer operate on battery power?

The AC/DC dual-mode system provides a specified battery runtime of at least 5 hours, with overcharge protection.

How many test records can be stored?

The internal data storage supports up to 200 measurement records.

Is the KS30-3-R suitable for GIS maintenance?

Yes. The analyzer is designed for field SF₆ gas quality testing applications such as GIS, SF₆ circuit breakers and SF₆ switchgear maintenance.

KSTONE SF₆ Gas Analysis Solutions

KSTONE provides SF₆ gas analysis solutions covering dew point, SF₆ purity, SO₂ and other SF₆ decomposition products.

For applications requiring different combinations of gas parameters, KSTONE can provide modular and customized analyzer configurations according to the customer’s measurement requirements.

For higher-parameter SF₆ gas analysis, KSTONE also provides configurable systems covering additional components such as H₂S, HF, CO, O₂ and other gases, depending on the selected configuration.