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Applications

▪ Urban air quality measuring networks

▪ Smart building automation (ventilation control)

▪ Roadside and tunnel monitoring (traffic emissions)

▪ Monitoring point emission sources

▪ Industrial emission monitoring

▪ Mobile measuring

▪ Research applications and public projects

▪ Indicative measuring by authorities

▪ Solar-powered air quality networks

Vaisala Air Quality Transmitter AQT420 for Measuring Pollution Gases and Particles

Vaisala Air Quality Transmitter AQT420 revolutionizes measuring air quality. It is a cost effective, compact solution to monitoring air quality and meteorological data. AQT420 is an air quality transmitter that measures up to four most common gaseous pollutants such as nitrogen dioxide (NO2), nitrogen monoxide (NO), sulphur dioxide (SO2), carbon monoxide (CO), hydrogen sulphide (H2S), and ozone (O3) and weather data, such as humidity, air pressure and temperature, plus particles (PM2.5 and PM10) in the ambient air. The measurement data will be sent wirelessly to a web-based database or available locally via a serial interface.

Features

▪ Measures up to four most common air pollutants (eg. VOC, CO, CO2, NO, NO2, SO2, H2S and O3)

▪ Measures particles (PM2.5 and PM10)

▪ Basic meteorological variables including temperature, humidity and barometric pressure

▪ Extremely compact, low-cost and elegant design

▪ Low power consumption (typically 0.5W)

▪ Wireless Internet connection via an optional integrated 2/3G modem

▪ RS232 and RS485 interfaces for local connectivity (eg. Modbus support)

▪ Easy integration and open API

Small and elegantly designed, AQT420 is excellent for monitoring air quality in urban areas and around industry. It is the first air quality transmitter for ambient air. AQT420 is an identical unit to Vaisala Air Quality Transmitter AQT410 with the addition of a particle counter.

The gas measuring is based on proprietary advanced electrochemical technology that enables ppb measuring at an affordable price. The gas analysis module compensates the impact of ambient conditions on the sensor elements with sophisticated algorithms and active temperature control to achieve performance that is far better than that of competitors. AQT420 is calibrated at the factory for a period of 12-24 months.

Ref. B211581EN-A ©Vaisala 2016This material is subject to copyright protection, with all copyrights retained by Vaisala and its individual partners. All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. The reproduction, transfer, distribution or storage of information contained in this brochure in any form without the prior written consent of Vaisala is strictly prohibited. All specifications — technical included — are subject to change without notice.

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Technical Data

GeneralData protocols HTTP (open API), SMS, Modbus, ASCIISerial data interface RS-485Console interface RS-2322/3G connection forInternet protocols

Quad-band 850/900/1800/1900 MHz GSM/GPRS/EDGE + 2100 MHz UMTS

Power and data connector

Standard 8-pin M12 male

Operating voltage 8 — 30 VDCPower consumption Typ. 0.5 W, max. 2 WOperating environment

-30 — 50 °C, RH 15 — 95 %

Protection class IP65Enclosure materials Anodized aluminium, stainless steelDimensions 128(w) x 125(h) x 128(d) mmWeight 690 g (without 2/3G modem)Warranty 2 years (sensors not included)

Measurement SpecificationsTemperature range -40 — 85 °CTemperature resolution 0.1 °CTemperature accuracy ±0.3 °C, repeatability ±0.1 °CHumidity range 0 — 100 %RH (non-condensing)Humidity resolution 0.1 %RHHumidity accuracy ±2 %RH, repeatability ±0.2 %RHPressure range 800 — 1100 mbarPressure resolution 1 mbarPressure accuracy <±1 % FSParticle counter channels PM2.5 and PM10

Particle counter resolution 1 μg/m3

Sampling interval 1 — 1440 minutesResponse time <60 secondsFactory calibration 1-3 years depending on sensor

configuration

Gas Measurement SpecificationsGAS RANGE MIN.

DETECTIONRESO- LUTION

PRECI-SION

LINEA-RITY

UNIT

SO2 0 — 2 0.005 ±0.001 <±1 % FS <±1 % FS ppmNO2 0 — 2 0.005 ±0.001 <±1 % FS <±1 % FS ppmNO 0 — 2 0.005 ±0.001 <±1 % FS <±1 % FS ppmH2S 0 — 2 0.005 ±0.001 <±1 % FS <±1 % FS ppmCO 0 — 10 0.01 ±0.01 <±2 % FS <±2 % FS ppmO3 0 — 2 0.005 ±0.01 <±3 % FS <±2 % FS ppm

ConformityEMC IEC/EN 61326-1,

IEC/EN61000-4-2/3/4/5/6, CISPR 22IGSM/UMTS FCC 47 parts 15 and 24, EN 301 511,

EN 301 489-1/7, EN 60950-1:2006Reference methods EN 14211:2005, EN 14626:2005,

EN 14625:2005, EN14212:2005, EN 12341, EN 14907

Ordering InformationBase Unit AQT420Accessories included

Installation cable (2 m), calibrationcertificate, and user manual

Options CO sensorNO sensor

NO2 sensorSO2 sensorH2S sensorO3 sensor

2/3G modemMounting kit

Installation cable (5 m)Installation cable (10 m)

PC connection cable

Particle Measurement SpecificationsParticle range 0.3 — 20 μm (spherical equivalent)Response time <60 s Internal channels 16Sampling interval 10 s

Sample flow rate 0.5 SLM (integrated vacuum pump)Count rate 10 000 particles/sUnits μg/m3