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. 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.
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: ± 75ppm, ± 8% of reading (0~2000 ppm) - Display Resolution - ±1 ppm - Datalogging: 50,000 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 | ± 75ppm, ± 8% 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(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 | 24 hours | External Power Supply | 6V VDC with 0.5A |
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