Air-Quality Meter MF420
CO₂-monitoring air-quality meter to measure air-quality indoors

The air-quality meter is designed to monitor the air quality indoors. A CO₂-monitoring lights detects the carbon dioxide content in air at a surrounding temperature of -10 to +50 °C quickly and accurate. We all know the importance of the indoors climate at a workplace, in schools, kindergartens etc. Thus the performance of every single person crucially depends on the air-quality at the working place. What air-quality is, how it effects people, and how it can be optimized, will be explained, if you follow this link (explanation air-quality). If there are any questions about this air-quality meter MF420, please have a look at the technical specification below or call: UK customers +44(0) 23 809 870 30 / US customers +1-410-387-7703. Our technicians and engineers will gladly advise you in all air quality meters and all products in the field of measuring instruments, regulation and control and scales. 

Characteristics
This CO2-monitoring lights detect the carbon dioxide percentage in air at a surrounding temperature of -10 to +50 °C quickly and accurate. Within the air-quality meter there is a novel infrared metering system, that functions principally like a common two-beam photometer. But since material and measuring cuvette are novel, and evaluation and processing of the measuring signals follow a new digital algorithm, the air-quality meter is light, compact, during common use maintenance-free, long-term stable, mobile, but less expensive than other infrared systems. 
The air-quality meter is either installed at a wall or set on a shelf and operates via an adapter. The meter is equipped with a green, a yellow and a red light that display the air-quality. The green light indicates a carbon dioxide concentration lower than the Pettenkofer maximal value of 1,000 and means that the air quality is alright. The yellow LED light glows at a carbon dioxide concentration between 1,000 and 2,500 ppm, and with that a beep-tone signals this level as well. Thus an aeration is advised. The red light equals a value of more than 2,500 ppm CO2 and the device starts beeping twice. Aeration is necessary. Above values of more than 3,000 ppm the device beeps five times and the red light blinks. 

Air-quality meter FM420

The infrared system determines the absolute CO2-concentration in the surrounding air, monitors constantly itself and reports malfunction of the hard- and software immediately. The whole measuring range is linear. Installation is very easy - a professional is not demanded. Simply install and start!

Measuring system

A broadband infrared radiator (red quadrate) emits pulsed infrared radiation. The infrared radiation follow a path of rays inside a cuvette. The carbon dioxide diffused into the cuvette, absorbs within the gas mixture infrared radiation of specific wave length. At the end of the path of rays a two-beam-NIDR-photometer gauges the incoming infrared radiation of that carbon dioxide specific wave length compared to a specific reference wavelength.

Technical Specifications

Transmitter

Power Supply

Adapter  

230 V

Current

350 mA; output 24 V

Surrounding temperature

-10 ... +50 °C

Air pressure

900 ... 1100 hPa

Humidity

15 ... 95% relative humidity 

Protection type

IP 30

Optical display: measurement results

green LED

CO2 < 1.500 ppm

yellow LED

1,500 ppm < CO2 < 2.500 ppm

red LED

CO2 > 2.500 ppm

red LED blinking

CO2 >3.000 ppm

Acoustic signals for measurement results

Buzzer 1 x 

CO2 > 1.500 ppm

Buzzer 2 x 

CO2 > 2.500 ppm

Buzzer 5 x 

CO2 > 3.000 ppm

Malfunction

yellow LED blinks 

Dimensions

78 x 78 x 35 mm

Weight

approx. 150 g

Sensor

Gas access 

via diffusion

Measurement range

0 ... 3000 ppm CO2

Warm-up time

5 min.

Accuracy 

±2 %

Reproducibility

±1 %

Response time

approx. 30 sec.

Delivery content
1 x air-quality meter MF420, instruction manual

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