Sulfur Dioxide Analyzers

Feature Collection

Detection Limits


Gases Measured


Width (English)


Model 43i SO2 Analyzer Thermo Scientific™

Measure SO2 in ambient air up to 100ppm with the Thermo Scientific™ Model 43i SO2 Analyzer, the first gas analyzer to utilize pulsed fluorescence technology to measure SO2. Reflective bandpass filters are less subject to photochemical degradation and more selective in wavelength isolation, resulting in both increased detection specificity and long term stability.

Discover the iQ to work smarter with our next generation 43iQ Sulfur Dioxide Analyzer.

Model 43i-HL High Level SO2 Analyzer Thermo Scientific™

Measure high levels of SO2 from a source up to 10,000 ppm with the Thermo Scientific™ Model 43i-HL SO2 Analyzer, the first gas analyzer to utilize pulsed fluorescence technology to measure SO2.

Discover the iQ to work smarter with our next generation 43iQ High Level Sulfur Dioxide Analyzer.

43iQ Sulfur Dioxide Analyzer

Get 24/7 access to your analyzer’s information with a Thermo Scientific™ iQ Series Gas Analyzer. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The Thermo Scientific™43iQ Sulfur Dioxide Analyzer provides the same level of performance when measuring sulfur dioxide (SO2) in ambient air up to 100ppm using pulsed fluorescence technology.

43iQ High Level Sulfur Dioxide Analyzer Thermo Scientific™

Get 24/7 access to your analyzer’s information with a Thermo Scientific™ iQ Series Gas Analyzer. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The 43iQ High Level SO2 Analyzer utilizes pulsed fluorescence technology to measure the amount of sulfur dioxide in the air up to 1,000 ppm in standard range and up to 10,000 ppm in extended range.

43iQ Trace Level Sulfur Dioxide Analyzer Thermo Scientific™

Get 24/7 access to your analyzer’s information with a Thermo Scientific™ iQ Series Gas Analyzer. The iQ Series Gas Analyzers are engineered to get smarter over time and help minimize troubleshooting time with a highly precise, yet tough solution. The 43iQ Trace Level SO2 Analyzer utilizes pulsed fluorescence technology to measure the amount of sulfur dioxide in the air to .05ppb.
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