CO Meter + Pump | UK Calibration Certificate | USB Recharge | Sound, Light and Vibration Alarms| 0-1000 ppm CO |

doesn't work with most of the boilers as the probe head doesn't fit into the fitting tubular's chamber.

Delivery was delayed, otherwise the purchase was a positive experience

Great product for the price. Great to have on hand if your a HVAC technician or even if you just want to check your own furnace.

SEEMED TO WORK FINE.

It does very well monitoring. There two minor issues. The charging port has shallow connections and the charging cable has to be pressed in harder than normal to get the unit to charge. The second is the power switch. It is a little fussy to get it to turn on or off. That said, when it is monitoring, I have high confidence that I am working in an area free of CO.

Make sure that you need something that measures under 1000 PPM. I got this to check forklift exhaust gasses, however, unless you have a pretty new forklift, it's almost certain to be over 1000 PPM. Another note, my first unit turned on the first time and then never worked properly again. If I plugged it in, it would just say charging, but never allow me to get to the menu (even after unplugged). That said, the return wasn't too hard. The unit seems easy enough to use, was surprisingly sensitive, and the vacuum pump portion seemed to be quite reliable.

As an commercial appliance tech,this has been a good tool to have on my van. Only had it a few months but have used it a few times,and it seems to work fine. Company guarantees its calibration