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For technical enquiries, include the sensor model, measured quantity, expected range and available interface. For a correction, include the guide URL and supporting documentation.

EDITORIAL METHOD

How the library is researched.

Gassium explains sensing principles and compares documented manufacturer options for air, gas and ambient measurements. We use original technical documentation for model specifications and government, metrology and research sources for measurement theory and evaluation. Source lists accompany each guide.

Alphasense OX-B431 bare oxidizing-gas cell
Alphasense OX-B431: a bare cell that requires an electrode circuit, calibration and an instrument host.
Vaisala HMP110 temperature and humidity probe
Vaisala HMP110: a complete temperature and humidity probe with documented output options.

Model scope and measurement conditions

Comparisons identify the model and configuration and retain meaningful conditions for accuracy, response time, environmental limits and calibration. A cell, probe, sensor head and complete analyzer have different integration requirements. The ozone guide shows how these distinctions affect selection.

Evidence and revisions

Manufacturer specifications are identified as documented claims. Research findings retain their test conditions and publication date. The comparisons currently published use documentation rather than an independent Gassium laboratory test program. Where sources disagree, the guide identifies the discrepancy and the basis used for the comparison.

Commercial recommendations

Commercial recommendations follow the main technical content. Integration requirements retain their model-specific qualifications, including power, interfaces and protocol support. Manufacturer comparisons focus on documented specifications and measurement-system design.