Air Quality Display

Best Sale

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.

Air Quality Display


AQD series displays three most major parameters of IAQ; CO2 level, humidity and temperature. It also provides date, day and time. AQD equipped with NDIR CO2 sensor, temperature and humidity sensors which is laboratory level. AQD series measures CO2 concentration which may not be noticeable by us and used the reading to control ventilation so that the indoor CO2 level can be kept below the ASHRAE recommended limit of 1000ppm. Monitoring humidity is very important as extended period in an area with humidity over 60% or below 40% can create conditions for mold and mildew growth that may cause allergies and affect general health.


  • Smart Air Quality Monitor
  • It can be connected to ventilation system. Wind volume from ventillation can be adjusted according the measurement value to reduce indoor CO2 density. Additonally, it provides the value of indoor temperature and humidity as a reference of comfort and air quality.
  • Features:
  • - Continuous monitoring: non-stop detecting and monitoring, complete record, real time update, meet the criteria of " Taiwan indoor air quality act".
  • - Alarm function: 3 relay output, respectively corresponding to CO2, temperature and humidity. They can activate the HVAC equipment to maintain indoor air quality and save energy.
  • - Built-in memory: configurations can be stored after power off.
  • - Meet the criteria of " Taiwan indoor air quality act": record of hourly average value and 8-hour average value
  • - Data access: with AUS-001 RS485 to USB converter, user can read measurement data from computer
  • - A calender with year, month, date, day and time.


  • Type: Wall mount
  • Parameters: CO2, Relative Humidity, Temperature
  • Operating Environment: -10 ~ 60°C / 0 ~ 95%RH, non-condensing
  • Storage Temperature: -10 ~ 60°C
  • Clock: Real time clock with battery backup
  • Power Supply: 12 VDC (supply with an AC adapter 100 ~ 240V / 50 ~ 60Hz)
  • Current Consumption: 1.2A (max)
  • Display: 7 segment LED display
  • Memory Capacity: 60000 values

CO2 Measurement

  • Measurement Principle: Non-dispersive infrared (NDIR) with automatic calibration
  • Measurement Range: 0 ~ 9999 ppm
  • Accuracy Tolerance: 0 ~ 2000ppm ± 3% and ± 40 ppm (note1 and 2)
  • Response Time: 2 minutes by 90%
  • Maintenance: Maintenance-free for normal indoor applications
  • Environmental: -10 ~ 60°C / 0 ~ 95%RH, non-condensation
  • Display Digit: 4 digits, 0 ~ 9999
  • Relay Setting: 1200ppm
  • Hysteresis: 100ppm

Humidity Measurement

  • Measurement Range: 0 ~ 95 %RH
  • Accuracy Tolerance: ± 3 %RH (typical)
  • Repeatability: ± 0.1 %RH
  • Response Time τ63: < 8 s (τ63%, 25°C)
  • Long-term Drift: < 0.5 %RH / year
  • Display Digit: 2 digits, 0 ~ 99
  • Relay Setting: 70 %RH
  • Hysteresis: 5 %RH

Temperature Measurement

  • Measurement Range: -10 ~ 60°C
  • Accuracy Tolerance: ± 0.3°C (typical)
  • Repeatability: ± 0.1°C
  • Response Time τ63: 5 ~ 30 s (τ63%, 25°C)
  • Long-term Drift: < 0.04 °C / year
  • Display Digit: 3 digits (One decimal point), 0.0 ~ 99.9
  • Relay Setting: 28°C
  • Hysteresis: 1°C


  • RS-485: RS485 (Modbus RTU)
  • Relay: 3 Relay outputs for CO2, relative humidity, and temperature respectively. N.O. and N.C. (2A / 30VDC)


  • Housing Material: PMMA panel (4mm), SPCC casing (1mm)
  • Dimensions: 527 x 217 x 32 mm
  • Weight: 2600g
Files Download