What are the CO2 alarm thresholds on the MultiRAE 6-gas?

• A. Low 1,000; High 5,000; IDLH 10,000
• B. Low 5,000; High 30,000; IDLH 40,000
• C. Low 2,000; High 20,000; IDLH 30,000
• D. Low 10,000; High 40,000; IDLH 50,000

Answer: (B)

CO2 thresholds on a MultiRAE 6-gas are set to match standard safety exposure levels so you can act appropriately. A low alarm at 5,000 ppm gives an early warning before reaching regulatory limits, a high alarm at 30,000 ppm indicates a serious level that requires immediate attention, and the IDLH threshold at 40,000 ppm marks a concentration immediately dangerous to life and health. These values align with common safety guidelines for CO2: 5,000 ppm as the typical8-hour exposure limit (TWA), 30,000 ppm as the short-term exposure limit (STEL), and 40,000 ppm as the IDLH level. In normal environments CO2 is around 400 ppm, so these alarms provide timely警示 in confined spaces. Other options don’t correspond to these widely used thresholds.