4-in-1 Air Quality Display

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4-in-1 Air Quality Display | Automation System & Control | Industrial Equipment Supplier - Aecl

Based in Taiwan, Autotronic Enterprise Co., Ltd. is an industrial equipment supplier of automation system controllers and signal converters since 1976.

As an industrial equipment supplier of automation environmental sensing, liquid measurement and analysis, Aecl provides total automation system control solutions particularly for air quality and temperature & humidity automation control fields. Flow control devices such as paddlewheels, magnetic and turbines, environment measurement equipment such as temperature & humidity transmitters, heat (BTU) meters & calculators and ultrasonic flowmeters, and GF valves and GF signet as a distributor in Taiwan.

Aecl has been offering customers high-quality and reliable automation system controllers, signal converter manufacturing and control systems, analyzers and automation solutions with professionalism. Both with advanced technology and 40 years of experience, Aecl ensures each customer's demands are met.

4-in-1 Air Quality Display


AQD-101 Air Quality display includes 4 Air Quality measurements as well as the clock and calendar. It is widely used in train station, office or shopping mall to monitor and keep IEQ data in record for analysis, and also provides a clear air quality indication to passengers or office staffs.

Three relays are equipped to control auxilary devices for air quality improvement. When the measurements are higher than the setting level, it can trigger alarm or to activate ventilation system to introduce fresh air.

Multi-function air quality indicator


  • 4 indicators of air quality: CO2, PM2.5, Temperature, Humidity.
  • Clock and Calendar Display: Year, Month, Date, Day, Time.
  • Bulit-in Non-dispersive infrared (NDIR) CO2 sensor with automatic calibration
  • Built-in Laser Distributing PM2.5 sensors for reliable air detection
  • Built-in Built-in high accuracy and reliable Temperature, humidity sensors.
  • Clear and Bright 7 segment LED display
  • Non-stop real time data monitoring
  • 3 Relays can be used to activate ventilation system or alarm devices
  • RS485 Modbus communication or switchable RS485/ LoRa transmission
  • Comply with " Taiwan indoor air quality management act"
  • Maintenance-free for normal indoor applications
  • CE & FCC Certification
  • Customized specification is avaialable upon request


  • Measurements: CO2, PM2.5, Humidity, Temperature
  • Clock and calendar: Real time clock and calendar
  • Measurement range:
  •   CO2: 0 ~ 9999 ppm
  •   PM2.5: 0~ 600 μg/m3
  •   Humidity: 0 ~ 95 %RH
  •   Temperature: -10 ~ 60°C
  • Power Supply: 12 VDC (supply with an AC adapter 100 ~ 240V / 50 ~ 60Hz)
  • Display: 7 segment LED display
  • Installation: wall-mount
  • Output signals:
  •   RS485 (Modbus RTU)
  •   Switchable RS485 or LoRa (Peer to Peer), radio frequency band: 868.0 ~ 912.9 MHz
  • Alarm output: 3 Relay outputs can be specified as CO2, PM2.5, relative humidity, or temperature N.O. and N.C. (2A/30VDC)
  • Dimensions (mm): 527 x 217 x 32
  • Weight: 2700g


  • Commercial building / office
  • Train station
  • Shopping Mall
  • Warehouse
  • Museum
  • Hospital
  • Medical Center
  • Factory
  • Library
  • Indoor places where would be required to detect CO2, Temperature and Humidity
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