TENMARS ST-501 CO2/TEMP/RH INDOOR AIR QUALITY METER WITH DATALOGGING FUNCTION Product Description - 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. Application ST-501 is an excellent indoor air quality (IAQ) instrument measuring the carbon dioxide (CO2), Relative Humidity (RH) and Temperature. Applications - Building HVAC monitoring. - Indoor air quality survey. - Locate the presence of combustion fumes from vehicles and appliances. Specification - 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.) CO2 Sensor Type Non-dispersive infra-red (NDIR) Measurement Range 0~9999 ppm (2001~9999 ppm over range) Accuracy ±60ppm, ±5% of reading (0~2000 ppm) Resolution ±1 ppm Response Time 2 seconds Relative Humidity Sensor Temperature Sensor: Type CMOSens Type Thermistor Measurement Range 1% ~99% Measurement Range 0 to 50C Accuracy ±3.0%RH(20~80%) ±5.0%RH(<20% >80%) Accuracy ±0.5C from 0-50C Resolution 0.1% Resolution 0.1C Response Time 8 Seconds Response Time 1 seconds Power Supply Battery Four AAalkaline batteries x4 Battery Operation about 24 hours External Power Supply 6V VDC with 0.5A
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