LKC1000S 2nd Professional Air Quality Monitor & Particle Counter

Best product really like it

Professional quality. This is super easy to use and useful for making sure you are breathing healthy air. Comes ready to go and with a usb charging cable. When it's charged you just press and hold the center button until the startup screen appears. Place the device on a stable surface or hold steady. Select AQI (air quality index) to see the standard AQI that is used in weather reports and smog alerts. Press PM 2.5 to see 2.5 and 10 micron particles per cubic meter and total particles per liter. Press HCHO to see formaldehyde (chemical from particle wood, glues, etc). I used this in my bedroom to make sure my air purifier was adequate and to minimize air leaks from outside. In my photos you can see the outside air was bad due to neighbor with wood stove. After getting a better air purifier and sealing air leaks I was able have super clean air that improves my sleep! NOTE: Follow the instructions so you get accurate readings. Don't blow into the vents and don't measure with air blowing into the unit. Make measurements in calm air with the device steady in your hand or on a clean surface. The air quality measurement stabilizes pretty quick, but for most accurate reading you should wait 2-3 minutes. Temperature and humidity are slower (the sensors are in the case) but will likely be accurate and stable in 5 minutes. Don't swing the device around or let air blow hard into it, otherwise you might get inaccurate results. It has a tiny internal mechanism that draws air into the particle counter module at the proper rate. The device will run approximately 8 hours on a charge. It does not store data, but some other models by this company do. The display is bright, clear, and easy to read. I am very pleased with the quality and functionality of this device! Don't waste money on the cheap ones. This is professional grade. NOTE: This is a sensitive device for measuring particles that are too small to see. If you use it in dusty or misty (paint, hair spray, fog, etc) environments you could foul the internal laser device that counts microscopic particles. For example if you used this in a cloud of talcum powder you could foul the laser optics. Some fluctuation of readings is normal due to particles shed by you, your hair, clothing, dust on surfaces, many sources. These particles can waft into this device with the slightest air movement, including just walking by this device. This affect is more pronounced in clean air because a wave of particles from clothing or other sources will be more obvious. NOTE: If you use this to measure visible particles, such as pollen, you can damage the sensor and will get inaccurate readings. Smoke may be ok for a short period of time (a few minutes) but this is best used in areas where visible particles are not present. Intended for 10 micrometers or smaller particles.

Great device if you live in wildfire country

It doesn't come with a carrying case & you can't change the batteries but the device is nice... The device is nice and easy to use but it has to be recharged via a USB cable and there is no case to carry the cable (very annoying!) or the device and it would be nice if it had a case that not only held the device and cable but the instruction manual a well. No carrying case (-1 Star) Can't change batteries (-1 Star) The device is very nice and works good. Good day & God Bless... Randall M. Rueff K9RMR

At first the readings had marked differences with other instruments (Triplett RHT22 and Davis Instruments Airlink). The Triplett and Airlink have been running non-stop for weeks. After allowing time for the Temtop to stabilize and calibrating the temperature and humidity, the readings are remarkably close in all three: Temtop temp 23.6, humidity 65.2, AQI 51, PM 2.5 12.2, PM10 19.1 Davis Instruments. temp 24, humidity 63, AQI 60, PM 2.5 16, PM10 16 Triplett RHT22 temp 23.7, humidity 61% All temperatures in degrees Celsius. My guess is that the differences in PM2.5, PM10 could be due to the Temtop using active air circulation for the sensors and the Airlink passive circulation, but I have no way to check it The HCOH sensor gives a reading of zero outdoors and the highest reading I've gotten indoors is between 0.01-0.02. It remains to be tested in a contaminated environment

I bought a new unit, the box had clearly been opened previously with a white stain and scratches on it