INKBIRDPLUS Portable CO2 Detector Mini Indoor CO2 Monitor NDIR Sensor with Full Color LCD Indicator Light Alarm Auto Calibration for Home Office Travel

Best build quality, accurate readings, beep sound, all good and awesome

had to return as faulty. Replacement working fine. Instructions manual has text size too small to read, had to photograph it and zoom in on computer to read

It's very easy to use, qualitywise very hardy, hope battery life should be as expected, accuracy is superb, a value for money product, overall nice performance. It has been delivered today and I have compared with another Air quality monitor and found CO2 reading of this device pretty accurate.Purchased at a discounted price of Rs 2,684/-

I was surprised by the high build quality of the product for the price (Rs. 2500). It also works really well, and has a long battery life. I left it running all night and it was still showing 3/3 bars of battery.It's also the most accurate CO2 sensor in its price range. I tested it in a variety of conditions after calibrating it.

Detects CO2 levels and has an alarm when the levels are too high

Ok

I initially purchased this CO2 meter to monitor CO2 levels in my agriculture room, where higher concentrations of CO2 are quite common. At first, the device worked well—it accurately displayed elevated CO2 readings between 2200–3800 ppm inside the room and normal levels of 400–500 ppm outside. This gave me confidence in its performance and reliability.However, after just 4–5 uses, the device began consistently showing readings in the range of 400-500 ppm, regardless of the location. Whether inside the agriculture room or outside in fresh air, the readings remained almost identical, which is clearly inaccurate given the expected CO2 variation.It seems the sensor has either malfunctioned or lost its calibration too quickly, which is disappointing for a device meant for repeated agricultural use. I would advise potential buyers to consider long-term reliability and calibration support when choosing a CO2 meter for such environments.

The media could not be loaded. NDIR CO2 sensor in principle is fairly accurate. The flashing Yellow, Red, and a beep above 1500 ppm is useful. Not doubting it but out of curiosity will compare it with other professional monitor and update this review if too much deviation is found. For my current home use case, this is more than enough. So far, I like it.