6-in-1 Air Quality Real-Time Datalogger Meter CO2 O2 CO Oxygen DewPoint Humidity Temperature Pollutant Meter LQ3

Item number: LQ3

Category: Living environment

599,99 €

including 16% VAT., plus shipping (Standard)

Short supply

Shipping time: 1 - 2 workdays


Our TMT-AQ-9901SD is a 6-in-1 real-time datalogger and meter that measures air quality for oxygen O², temperature, humidity, carbon monoxide CO and carbon dioxide CO2. It also calculates dew point and humid air temperature. The values can be conveniently read on the large, illuminated LCD display.



The air quality monitor TMT-AQ-9901SD reliably and precisely measures the indoor air quality. Indoor air quality, often referred to as a feel-good climate, is the aim of demand-driven ventilation and is determined by the factors of oxygen, CO and CO2 as well as relative humidity and temperature. With the compact and handy measuring device, you reliably and precisely measure the indoor air quality. With a good indoor air quality, humans, animals and plants feel most comfortable. Bad air quality in the home or office, on the other hand, causes headaches, fatigue and discomfort. A look at the display is enough and the cause is quickly determined, be it too much used air, too low or too high humidity or too high a CO2 load.




Our professional meter has 4 external sensors for the measurement of atmospheric oxygen (O2), carbon dioxide (CO2), carbon monoxide (CO) and humidity as well as the internal temperature sensor. The real-time data logger can record simultaneously either humidity, CO2, oxygen and temperature or humidity, CO, CO2 and temperature . Measured values can be recorded in the datalogger function every 2 seconds up to every 9 hours as required. The values can be read via SD card into spreadsheet programs such as Excel, OpenCalc etc. without any additional software. An SD card is not included! The device also has an RS232 / USB interface.

Our mobile multifunctional environmental data logger outputs measured values, Minimum values, Maximum values via a REC function to the easy-to-read, illuminated display. A HOLD function holds the current measured value. Meter and sensors are delivered in a handy carrying case.




Lutron AQ-9901SD


Technical details:

LED function display
Measuring range:

CO2: 0 - 4000 ppm
CO: 0 - 1000 ppm
O2: 0 - 30%
Humidity: 5% - 95%
Temperature: 0°C - 50°C/32°F - 122°F
Dew Point: -25.3°C - 48.9°C
-13.5°F - 120.1°F
Wet bulb temperature: -21.6°C - 50°C
-6.9°F - 122°F


CO2: 1 ppm
CO: 1 ppm
O2: 0.1%
Humidity: 0.1% R.H.
Temperature: 0.1°C
Dew Point: 0.1°C/0.1°F
Wet bulb temperature: 0.1°C/0.1°F

Measuring accuracy:

CO2: ±40ppm
CO: ± (5% + 2ppm)
O2: ± (1% + 0.2% O2)
Humidity: > 70% RH: ± (3% + 1%RH)
< 70% RH: ± 3% RH
Temperature: ± 0.8°C/± 1.5°F

Operating temperature:
0 - 50°C
32 - 122°F
Operating humidity:
less than 80%

Power supply:

DC 1.5V AA battery

350 g
177mm x 68mm x 45mm