Details

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ST-501  Indoor Air Quality (IAQ) Monitor

 
It is an excellent indoor air quality (IAQ) instrument measuring
the carbon dioxide (CO₂), Relative Humidity (RH) and Temperature.

 

Application

• Building HVAC monitoring.
• Indoor air quality survey.
• Locate the presence of combustion fumes from vehicles and appliances.

 

Features

• 3 Independent CO₂, humidity and temperature sensors.
• User operated CO₂ calibration.
• USB datalogg: 50,000 records.
• Internal backup battery to maintain date/time setting.
• Power management IC to increase batter efficiency.
• Easy- to-Use PC software for parameter settings and data analysis.
• Internal CO₂ alarm buzzer.

  Power Supply
  Battery	4 AA batteries
  Battery operation	24 hours
  External power supply	5V~6V VDC with 0.5A

 

Specifications

• CO₂ Sensing Method: NDIR (Non-Dispersive Infrared)
• Measures: Carbon dioxide in PPM, temperature (F or C), % Relative Humidity
• CO₂ Measurement range: 0~9999 ppm (2001~9999 ppm over range)
• CO₂ Accuracy: ± 60ppm, ± 5% of reading (0~2000 ppm)
• Display Resolution - ±1 ppm
• Datalogging:17,000 records,
• Fast USB download (50,000 records in less than 10 seconds.)

 
 
Electrical specifications 

CO2 Sensor
Type	Non-dispersive infra-red (NDIR)
Measurement  range	0~9999ppm
Accuracy	±60ppm or ±5% of reading
Resolution	±1ppm
Response time	Reaches 90%  in approximately 2 minutes

 

General
Operation condition	32°F~122°F (0°C~50°C)
	0~95%,RH,non-condensing
Storage temperature	-4°F~140°F (-20°C~60°C)

 

Relative Humidity Sensor
Type	CMOS Sensor
Measurement range	1%~99%
Accuracy	±3.0%RH (20%~80%) at 25°C  ±5.0%RH (<20%,>80%) at 25°C
Resolution	0.1%
Response time	8 seconds