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For the price this unit works very well, i am impressed. The meter was purchased to test the gas ducted heating system for CO emissions. Initially I wanted to test the unit for operation but did not have any CO on hand. I placed the meter in a plastic bag and breathed the air in the bag a few times (as if I was hyper ventilating) and the meter immediately registered a CO value. A few more breaths and the reading steadily increased. Basic but just what I needed. This unit will give me peace of mind in allowing regular checks of the CO content of the house when the heater is running. I can recommend this little meter most highly.
Verified purchase: Yes | Condition: New
Simple, light and easy to operate. Not very advanced but do what it’s supposed too.
Verified purchase: Yes | Condition: New
slow response but works ok price good easy to use
Verified purchase: Yes | Condition: New
At the moment would not recommend. Have not resolved the issue of having a new unit sent out.
Verified purchase: Yes | Condition: New
Acceptable low cost CO meter for general use determining presence/absence of CO where a calibrated instrument is not required.
Verified purchase: Yes | Condition: New