What Certifying agency (U/L or other agency) as listed this device as meeting requirements (OSHA, ASHRAE or other standards) for carbon monoxide detection?
Both models are manufactured in our partner company in the UK under ISO9001 quality guidelines. Neither model has been submitted to any certifying agency. I understand that the UL guidelines (such as UL-2034) for CO detectors are targeted to consumer type detectors that are similar to smoke alarms. The UL standard is related to the time weighted average and minimum levels over a set period of time before the alarm will sound. Our CO detectors are direct reading units that will display the current level of CO measured in the area in being measured. The CO71/CO71A are based on electrochemical toxic gas sensors, and as such require an annual recalibration. The new CO71A has a self-test function to verify that the sensor is active, but does not constitute recalibration or a verification of accuracy. This can only be done with a span gas that verifies that the detector is measuring the concentration of CO correctly.
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