Inspector CO Carbon Monoxide Monitor with Visual and Audible Alerts, Waterproof

This is an excellent product. I frequently use a propane cook stove in a small area and I need to monitor the CO. This is an actual measuring device as well as an alarm. I have tried to use home CO alarms and the were not useful, even the ones that have some digital readout. I paid over $100 for another brand of CO sensor that was highly recommended for pilots of small aircraft. It worked, but it didn't show readings until an alarm level was reached. This Sensorcon unit starts reading at 1 ppm. Listed as accurate to +/- 2ppm, I have no reason to doubt that.I don't have equipment to test this thing for accuracy but after several years of very frequent use, I am convinced that it works reliably and is likely far more accurate that my use requires.I was not aware that a freshly opened can of coffee grounds contains a high level of carbon monoxide. I open a can of coffee in the vicinity of my unit and its alarm started beeping. I didn't know what the cause was, but eventually I put it near the coffee and the reading went above the upper limit of the device. It seemed to damage the unit. I could not get it to work again, but the next morning it seemed to be functioning normally again. Keep it away from car exhausts especially when the car is cold and just being started, and keep it away from freshly open coffee grounds and you will be very happy with this CO sensor.

I use this in my airplane and it works perfectly, turning it on/off every flight.With irregular use, and approx 400hours of on time, the battery lasted me about 2years and 8 months. Battery replacement is easy.1. Unscrew 4 Philips screws in the bag2. Pull apart the casing3. Replace with a CR123A 3V Lithium Battery

Small, rugged, visible alarm seems to work well in my airplane. Ability to lock in max reading is helpful Digital readout is important to me. I put the unit where I can see the face and if there is a CO alarm there are flashing led's in the four corners. It requires calibration every 6 months and unless we buy a calibration kit it has to be returned for cal. Either way adds to the cost. For our use, looking for CO spikes in the cockpit of a small plane, we don't need accurate calibration. The instructions imply that you can go 2 years and then another 180 days before you must get it calibrated. The cost of the unit isn't too bad, so spending a little for a cal every couple of years will be o.k. It would be nice if the unit had a backlight, but not critical.

I like this product. It seems to work easy enough and be decent. However, there are less expensive CO monitors that do the same job just as well. For the Expense of the item, I would likely buy another item next time.

I bought this to check for CO in our Ford Explorer. This is a sturdy detector and has a professional feel and look to it. It's easy to use and carry around due to its compact size. Mine will read 0 most of the time and occasionally fluctuate to a 1 depending where im located. I wondered if it was truly reading anything, so I placed it near the exhaust of a running vehicle. Within a few seconds, it detected and displayed a reading of 5, and kept getting higher. I moved to fresh air, and it dropped back to 0. I'm impressed with the speed of the readings. Im hoping it's as accurate as it claims. I will update this review when it's time for its first calibration, or if I find something wrong in the meantime.

This is a fast acting sensor, necessary for confined areas that may rapidly increase in CO. Think about your car with an exhaust leak, an airplane cabin, and so on. For anyone living, working, sitting in a confined area where CO can rapidly accumulate and result in death, this is a must have and no brainer.The low level warning audible limit at 35ppm has tripped a few times in our small airplanes on descent. I'm able to hear that over my noise canceling headphones and the hum of the engine, although it does take a second to recognize what the alarm is. I haven't heard the upper limit trip yet.I'm no expert on these; what I learned when researching this product is that the sensor in this and several other handheld devices are chemically based, and thus, need to be periodically calibrated and have the sensor replaced. Maybe future advancements will change the need for that in other devices. For now though, this satisfies my needs.I've seen complaints on here that this works out to effectively $0.25/day for protection. But how much is your life worth? And do you buy life insurance? $1mm term for someone in their 40s is a little over $1.00 per day. That does nothing to ensure you are living, it simply provides a payout if they lose the gamble and you die. They pay your survivors, not you. This device helps to make sure you don't have to worry about that.The device can be recalibrated and have sensors replaced by the manufacturer. The cost of that, and whether that's worth it to you or not, I can't speak to that. But for myself, I'll happily buy a new one of these every two years.

Living with an aging Natural Gas Furnace - I began to wonder whether or not the combustion gases and carbon monoxide were escaping into the heated room air. This can happen - over time - if the burner unit should rust through - after years of use. I could have had someone out to inspect my unit -- but since the inspector was also going to be the Salesman pushing a New System - I thought it wise to invest in this tool - and see for myself. It is easy to use and sensitive. I happened to have it with me when I dined in a small restaurant, and as the chef at the far end of the restaurant, lit the stove and began cooking my meal, I could see the unit register trace levels of carbon monoxide. When he shut it down, the numbers went back to zero. At home I was able to check my furnace, my water heater and units for a few friends. I am well satisfied with this purchase.

Most CO detectors sound an alarm an hour before you're about to die. This meter allows you to detect the CO source and figure out how serious the problem is without requiring a near death experience.