If a site request says only “toxic gas measurement,” which sensor should you choose? “Toxic gas” groups many substances together, so that phrase alone is not enough to select a sensor. Sensors are designed to respond to specific gases, so first identify the substance you want to measure.
After confirming the gas name, consider the expected concentration, unit, and purpose of use. Let’s look at why this information affects sensor configuration and why a model name alone does not tell you what it can measure.
Sensors respond to target gases
A gas detector does not identify every substance in the air on its own. A sensor inside the instrument responds to its target gas, and the instrument displays that response as a concentration. An oxygen sensor measures oxygen; a CO sensor measures carbon monoxide. A reading from one sensor does not stand in for the concentration of another gas.
CO and CO₂ look similar, but they refer to different substances: carbon monoxide and carbon dioxide. If a document says CO, do not expand it to carbon dioxide on your own. Confirm that the substance name and abbreviation match. OSHA’s gas monitor guidance also treats CO and CO₂ as separate measurement targets. OSHA guidance on gas, oxygen, and combustible gas monitors
Range, unit, and accuracy are separate specifications
The measurement range is the concentration interval the instrument is designed to display. Resolution is the smallest increment distinguishable on the display, while accuracy is a separate characteristic describing how close an indication is to a reference value. For example, the fact that a display changes in 1 ppm increments does not mean its measurement error is 1 ppm.
It is also best to confirm the concentration unit as written. ppm and %VOL are convertible ways to express concentration, while %LEL is a proportion relative to a combustible gas’s lower explosive limit and is not the same scale. You need to know the target and expected concentration interval to compare a sensor’s range with the requirement. Industrial Scientific Gas Detection Glossary
Distinguish the ES30A product family from the installed configuration
AI Safety Korea Co., Ltd.’s published materials describe the GasProbe ES30A as a product that uses interchangeable smart sensor modules. A product-family overview alone does not establish which gas sensors are installed in an individual instrument or whether that combination is currently supplied. That is why the sensor configuration and delivery specification should be checked together. ES30A product details and catalog
In particular, the CO range shown in the published catalog is inconsistent between two tables, so this article does not present either value as a confirmed specification. The discrepancy cannot be resolved by arbitrarily choosing or averaging the values. Ask the supplier to confirm the specification for the sensor used in the instrument and the applicable document revision.
Turn the wording in a request into specification questions
Suppose a hypothetical site request says “CO₂, up to 2% VOL.” The substance name, range, and unit are explicit, so you can begin reviewing candidate sensors and specifications. If the request says only “toxic gas,” first confirm the target substance. Assuming the same sensor configuration works for both requests could lead to measuring the wrong target.
If a request gives no range, do not invent a value to fill it in. Ask the site contact which interval is needed. Each piece of information matters: the gas name identifies what the sensor should read, while the range and unit describe which concentration interval must be checked.
Missing information means the sensor requirement is not yet defined
If site materials name a substance but do not give a concentration range, you know only that the sensor should measure that gas; you cannot tell whether the instrument covers the required interval. Conversely, a numeric range such as “0–X” without a gas name leaves the sensor requirement unclear. These are different pieces needed to connect the request to the specification.
For example, a hypothetical purchase request saying “CO, 0–100 ppm, ppm display” lets the supplier compare a CO channel and a range requirement. This wording alone does not determine accuracy or purpose of use, so the site’s intended measurement should be clarified too. Values in a request describe site requirements; they do not prove that a product meets those conditions.
A sensor’s response may not work like a simple switch that perfectly isolates one gas. Whether a response to other substances or a correction affects a measurement depends on the sensor and instrument documentation. Do not attribute a general possibility to a specific ES30A sensor. Check the manufacturer’s cross-sensitivity and correction guidance.
If a gas is identified only by a trade name or process abbreviation, compare it with the substance name in the relevant safety documentation instead of leaving the supplier to guess the sensor. Only after that step can a sensor-specification comparison start from the same target.
Need help matching a sensor configuration to a target gas?
Share the gas name you need to measure and the range and unit stated in your site materials. We can discuss which ES30A sensor configuration needs confirmation and which specifications remain unresolved. Contact AI Safety Korea Co., Ltd. with the site conditions to clarify the required configuration.
Ask about sensors for your target gas