SMART SENSOR Handheld Carbon Monoxide Meter

Very practical product, I like it

Easy to use and carry, recommended

The calibration mode is very powerful

Very sensitive, not bad

Portable, high visibility, loud sound

Excellent product thanks!

It is portable and easy to use. Used twice in a short time. Safety first! !

Very portable and easy to use.

The price is ok, I thought it would be a good choice, until last week I found out it was inaccurate, and then it got better

A great product, I have been using it in the garage, it can respond quickly to all changes in temperature. Very convenient, long battery life!

Fast shipping, well packed and working as expected.

Except the logistics is a bit slow, everything else is pretty good for me

It takes 120 seconds to feel the surrounding air environment to ensure accurate readings of the meter. I am very satisfied

The device works well, but there is no other device to compare with

The price is ok, I think it will be a good choice

Dispatch took a couple days, but the shipping was quick, and it worked out about 30% cheaper to buy from TomTop rather than from a UK based internet seller, so the slightly longer arrival time was a reasonable trade off. I've been having a play with this today, and I have to say that it's not half bad. On start up it has a 2 minute "Warm up" time that it runs (My guess is that it's probably checking the air to try and calibrate where 0 PPM is, so it might be best to do this in a relatively CO free area). It seems to do this every time it starts, but it can be skipped by just tapping the power button again, though I'd let it run through fully occasionally if the exact reading was important. It responds pretty quickly to changes in CO concentration, so this is ideal for wandering around the house and seeing if there's any areas where carbon monoxide could be accumulating. It's got some nice features too. It has the obvious ones like a temperature gauge that can be set to 'C or 'F, A nice bright backlight you can turn on and off, and maximum/minimum reading modes so you can leave it running and log how low or high the CO level got. It's also got a few less obvious features, like if you hold the mode button you'll get a screen with 4 numbers and "AL1". You can change the numbers to what carbon dioxide concentration you want the built in beeper to start going off at. you scroll through the numbers with the light button, and move to the next number on the left with the temperature one. to save your setting you just hold the mode button again. If you hold the temperature button you switch between measuring in parts per million and measuring in "Micromoles" (A unit that's not particularly usefull for home/industrial users, but it could be handy for a science student). And holding the light button allows you to switch the automatic power off function on and off. I believe the power off option shuts the unit off after 30 minutes of no buttons being pressed. I have another CO meter, and this one seems to agree with the readings on that one, but this one has a much higher refresh rate, so the other one is constantly trying to catch up to what this ones displaying. It's a very compact unit (If you're old enough to remember, think around "Nokia 5110" sized), and feels robust and light enough that it probably won't instantly break plastics if dropped. All in all, it seems like this unit is significantly better than the minimal outlay would imply.

I checked a ventless gas fireplace with this tool to make sure it was burning clean. It gave a real-time CO reading as low as 1 ppm, and immediately, to show that the fireplace was burning mostly clean, with occasional 40 ppm CO fluctuations. You should not trust CO detectors or alarms. You need a meter like this to be sure. Carbon monoxide alarms do not have a certified rating for detecting or emitting carbon monoxide levels. Most of the time, more than 10 hours of exposure to 40 ppm carbon monoxide was required before the alarm activated, and nothing below that value was detected. Even at 200 ppm, they typically require an hour of continuous exposure to activate. These may save you from a lethal dose of carbon monoxide, but they won't protect you from long-term exposure to low levels of carbon monoxide, which is still very dangerous! Many CO detector manufacturers do not know or are reluctant to disclose what levels their devices will detect. I recommend using a meter like this instead.

I checked a ventless gas fireplace with this tool to make sure it was burning clean. It gave a real-time CO reading as low as 1 ppm, and immediately, to show that the fireplace was burning mostly clean, with occasional 40 ppm CO fluctuations. You should not trust CO detectors or alarms. You need a meter like this to be sure. Carbon monoxide alarms do not have a certified rating for detecting or emitting carbon monoxide levels. Most of the time, more than 10 hours of exposure to 40 ppm carbon monoxide was required before the alarm activated, and nothing below that value was detected. Even at 200 ppm, they typically require an hour of continuous exposure to activate. These may save you from a lethal dose of carbon monoxide, but they won't protect you from long-term exposure to low levels of carbon monoxide, which is still very dangerous! Many CO detector manufacturers do not know or are reluctant to disclose what levels their devices will detect. I recommend using a meter like this instead.

I checked a ventless gas fireplace with this tool to make sure it was burning clean. It gave a real-time CO reading as low as 1 ppm, and immediately, to show that the fireplace was burning mostly clean, with occasional 40 ppm CO fluctuations. You should not trust CO detectors or alarms. You need a meter like this to be sure. Carbon monoxide alarms do not have a certified rating for detecting or emitting carbon monoxide levels. Most of the time, more than 10 hours of exposure to 40 ppm carbon monoxide was required before the alarm activated, and nothing below that value was detected. Even at 200 ppm, they typically require an hour of continuous exposure to activate. These may save you from a lethal dose of carbon monoxide, but they won't protect you from long-term exposure to low levels of carbon monoxide, which is still very dangerous! Many CO detector manufacturers do not know or are reluctant to disclose what levels their devices will detect. I recommend using a meter like this instead.

I checked a ventless gas fireplace with this tool to make sure it was burning clean. It gave a real-time CO reading as low as 1 ppm, and immediately, to show that the fireplace was burning mostly clean, with occasional 40 ppm CO fluctuations. You should not trust CO detectors or alarms. You need a meter like this to be sure. Carbon monoxide alarms do not have a certified rating for detecting or emitting carbon monoxide levels. Most of the time, more than 10 hours of exposure to 40 ppm carbon monoxide was required before the alarm activated, and nothing below that value was detected. Even at 200 ppm, they typically require an hour of continuous exposure to activate. These may save you from a lethal dose of carbon monoxide, but they won't protect you from long-term exposure to low levels of carbon monoxide, which is still very dangerous! Many CO detector manufacturers do not know or are reluctant to disclose what levels their devices will detect. I recommend using a meter like this instead.