NDIR CO2 Monitor – Indoor Air Quality Meter with Temperature & Humidity

The Problem: CO2 Levels You Cannot Feel Until It Is Too Late

Carbon dioxide is the most reliable indicator of indoor air quality — and one of the most consistently underestimated. In a well-ventilated space, CO2 levels sit around 400–600 ppm (parts per million), close to the outdoor baseline. In a poorly ventilated room, a crowded office, or a sealed car, CO2 levels can climb to 1,500, 2,000, or even 3,000 ppm within hours. At these concentrations, the effects are measurable and significant: reduced cognitive performance, increased fatigue, headaches, and the general sense of mental fog that makes it difficult to concentrate or think clearly.

The insidious thing about elevated CO2 is that it does not feel like a problem. It feels like tiredness. Like a bad day. Like difficulty concentrating for reasons you cannot identify. Most people attribute these symptoms to stress, poor sleep, or overwork — never suspecting that the air in the room they are sitting in is the actual cause.

The NDIR CO2 Monitor makes CO2 levels visible in real time, giving you the information you need to understand when your indoor environment is affecting your performance and wellbeing — and to do something about it.

NDIR Technology: The Gold Standard for CO2 Detection

Not all CO2 sensors are equal. The NDIR (Non-Dispersive Infrared) detection method used in this monitor is the gold standard for accurate CO2 measurement — the same technology used in professional and scientific instruments. NDIR sensors work by measuring the absorption of infrared light at the specific wavelength that CO2 absorbs, providing accurate, stable readings that do not drift significantly over time and do not require frequent recalibration.

The measurement range of 400–5000 ppm covers the full spectrum from clean outdoor air to severely compromised indoor environments, giving you meaningful data across all the conditions you are likely to encounter. The 1.5-second sampling time means the display updates rapidly, allowing you to see in real time how opening a window, running ventilation, or leaving a room affects CO2 levels.

Temperature & Humidity: The Complete Indoor Environment Picture

CO2 does not exist in isolation — it is one component of a broader indoor environment that includes temperature and humidity. High humidity promotes mould growth and dust mite proliferation. Low humidity causes respiratory irritation and dry skin. Temperature extremes affect both comfort and the behaviour of other pollutants. By monitoring all three parameters simultaneously, this device gives you a complete picture of your indoor environment rather than a single data point.

Portable & Rechargeable: Monitor Any Space

The compact 70×80×35mm form factor and built-in 1000mAh rechargeable battery make this monitor genuinely portable — small enough to carry in a bag, light enough to move between rooms, and battery-powered enough to use in spaces without convenient power access. The three-colour LED indicator provides an at-a-glance status that is readable from across the room, supplementing the detailed numerical display for quick environmental checks.

Specifications

Detection Method: NDIR (Non-Dispersive Infrared)

CO2 Measurement Range: 400–5000 ppm

Additional Parameters: Temperature, Humidity

Sampling Time: 1.5 seconds

Display: LCD screen with 3-colour LED indicator

Battery: 1000mAh lithium, USB-C rechargeable (5V DC)

Product Size: 70 × 80 × 35 mm / 2.76 × 3.15 × 1.38 in

Atmospheric Pressure Range: 86–106 kPa

Operating Temperature: -10°C to 50°C

Storage Temperature: -10°C to 60°C

Relative Humidity Range: 20–85%

Material: ABS

Package Contents: 1 × Main Unit, 1 × USB Charging Cable, 1 × Manual

Origin: Mainland China