Indoor Air Quality Meter, TENMARS ST-501

Indoor Air Quality Meter, TENMARS ST-501 Indoor Air Quality ( IAQ) Monitor - Building HVAC Monitoring. - Indoor Air Quality Survey. - Locate Combustion Fumes. FEATURES: - 3 independent CO2, humidity and temperature sensors. - User operated CO2 calibration. - Datalogging up to 50, 000 records with fast USB download. - Internal back-up battery to maintain the data of Date/ Time. - Power management IC to increase battery efficiency. - Easy-to-use PC software or parameter setting and data analysis. - Building in audio CI2 buzzer/ alarm. ST-501 SPECIFICATION: CO2 Sensor- GE Dual Bean Absorption infraredTM. Temperature / Humidity sensors. Measurement range : 0 to 5, 000 PPM. Display resolution: + / -1 PPM Accurancy: + / - 75 PPM or 10% of reading. Measurement Ranges: CO2 0 ~ 5, 000 PPM Humidity 0 ~ 95% RH Temperature 0º C ~ 50º C Signal Update Every 2 seconds Warm Up Time < 2 minutes Operation Conditions 0º C ~ 50º C ( 32º F to 122º F) , 0 to 95% RH, non condensing Accuracy : CO2 : + / - 75 ppm or 10% of the reading Humidity : 2.5% at 10% to 90% RH Temperature : + / - 5º C @ 0 ~ 50º C Signal Update Every 2 seconds Warm Up Time < 2 minutes Operation Conditions 0º C ~ 50º C ( 32º F to 122º F) , 0 to 95% RH, non condensing