ST-502
Desktop Indoor Air Quality (IAQ) Monitor

It is a desktop indoor air quality monitor that can measure carbon dioxide, relative humidity, air temperature, and ventilation rate.

APPLICATION

  • Building HVAC monitoring.
  • Indoor air quality survey

FEATURES

  • Non-Dispersive Infrared (NDIR) CO2 sensor ensures long term stability and durability.
  • 4 Measurements-CO2/CO2 Ventilation Rate/Temperature/Humidity.
  • Large display.
  • Easy -to-use PC software for parameter settings and analysis.
  • Fast USB download
  • CO2/Temperature/Humidity high,low alarm setting.
  • Set on the table or wall-Mounted (use ¼”tripod nut).

SPECIFICATIONS

  • Power adaptor AC 100V~240V to DC 12V/1.0A.
  • Internal backup battery to maintain date/time setting.
  • Datalogging capacity 17000 records.
  • Operation condition :0-50˚C (32-122˚F),5-95%RH(non-condensing).
  • Storage temperature & Humidity:-10~60˚C (14~140˚F) ≦70%RH.
  • Dimension: 89 X 62 X 128mm (LxWxH)
  • Weight:Approximately 190 grams
Electrical specifications 
Accurate ambient temperature range: 18°C (64°F) ~ 28°C (82°F)
Carbon dioxide
 Sensor Type
 Non-Dispersive InfraRed
 (NDIR)
 Measurement Range
 0~9999ppm
 Accuracy
 ±5% read value or
 ±75ppm.(0-2000ppm)
 Resolution
 ±1ppm
 Response Time
 Reaches 90%
 in approximately 2 minutes
Temperature
 Sensor Type
T hermistor
 Measurement Range
 0°C~50°C / 32°F~122°F
 Accuracy
 ±1.0°C/±1.8°F
 Resolution
 0.1°C/0.1°F
 Response Time
 Approximately 1 second
Relative Humidity
 Sensor Type
 Capacitive
 Measurement Range
 5-95%
 Accuracy
 ±3.0%RH(20~80%) @ 25°C
 ±5.0%RH(<20%,>80%)
 @ 25°C
 Resolution
 0.1%
 Response Time
 Approximately 4 seconds

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