Coreel Portable 4 Gas Monitor, Sound Light Vibration Multi-Gas Tester Detector, Rechargeable LCD Screen Backlight -Ready to Use

O2% is accurate testing with my oxygen concentrator output and its fast once warmed up. I have lung cancer and I'm paranoid about o2 levels in my shop heated by a propane ventless 30,000 btu heater in a well insulated shop office, so this relieved my fears about low o2 percentage. I think its a great device and the price is very reasonable.

I bought this meter as an extra meter for experimental testing of system designs involving stove leakage, heater off gassing and I have to say I like the rapid data updates, great sensitivity and alarms! I'd take this caving or use it for a work place, good battery life. It's a great deal for this kind of device. I like the case and the belt clip. Minuses, by the look of it it would probably short out if you fell in any water. Also the alarm voice has a weird thick Chinese accent and I haven't used it for a full year yet. But I'm not looking at this as a 10 year investment and the data accuracy seems pretty solid. So overall I'd say it's a great deal for the money. 5 stars.

Hard to tell if it’s working or not. But seems to indicate no leak problems.

I have worked with meters in hazardous materials response for 25 years and have used many name brand, high dollar, meters. So far, this one ranks as one of the best because of the price. Meters similar to this go for 4X the cost of this one. It was very easy to navigate the menu and change the alarm parameters. The meter calibrated easily, with gas I had lying around. The meter does take a few minutes to warm up. You can tell when it is ready, when the oxygen sensor settles down. I don't believe that the meter is intrinsically safe for flammable atmospheres, so you have to watch the LEL sensor closely. I plan on using it for training, but I would trust it down range.

The product works as long as you're at sea level. Problem is most mines are at higher altitudes where the oxygen has a lower concentration naturally - so the alarm is constantly going off. Without being able to compensate for this, the product is useless. Contacted the manufacturer in India but no response. It came without a manual and none are available online. UPDATE: The company contacted me and provided a manual (which was missing from the original packaging) You can indeed change the thresholds, which we did to 19%

Very Very Good

Ordered this monitor. Thought it would be a cheaper alternative to buying new sensors for a MSA solaris ($80/pc). Turned it on and it reads 19% o2 in my kitchen. Go outside and no change. I know this is impossible so I compared with a MSA solaris at work (underground mine). Solaris reads 21%. This one 19.1%. Obviously out of calibration. Returned for a replacement. Replacement comes I turn it on in open air outside and it reads 20%. 2 for 2 out of calibration. Will be returning. Dont waste your time with this monitor, you WILL DIE if using it for what gas monitors are for. I only wish I would have bump tested the other 3 sensors at work with calibration gas. If the o2 is out of calibration I wonder if the other sensors are even functional.

Only used this detector a couple of times in the last 2 years. The O2 sensor is bad and costs half the price of the unit. It is cheaply made but I expected it to last longer with the minimal usage. Just be aware this is a cheap unit that is not robust. This is a throw away unit. I should have known better.

favor de enviarnos los certificados de calibracion del equipo

Buena presentación desde el estuche donde viene el detector, el equipo se percibe de buenos materiales y las lecturas son bastante precisas.

que contengan números de serie para perder dar un seguimiento a mis equipos así como buena presentación en su empaque

Llegó un poco antes y en perfectas condiciones