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CO2/Temperature/Humidity Monitor ( ST501 )

RM 0.00


Model no : ST-501

Features :
3 independent CO2, humidity and temperature sensors
User operated CO2 calibration 
Data logging-up to 50,000 records
Fast USB download (50,000 records in less than 10 seconds)
Internal back-up battery to maintain data/time data 
Power management IC to increase battery efficiency 
Easy-to-use PC software or parameter settings and data analysis
Building-in audio CO2 buzzer/alarm  

Specifications :  
CO2 Sensor - GE dual beam absorption infrared 
Temperature / humidity sensors 
Measurement range : 0 to 5,000 ppm display 
Display resolution : ±1ppm 
Accuracy : ±75ppm or 10% of reading (whichever is greater)  

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

General :
Operation condition : 32 to 122°F (0 to 50°C), 0 to 95% RH, Non-Condensing 
- Storage temperature : -4 to 140°F (-20 to 60°C)

Sensors :
CO2 sensor :

Type : Non-dispersive infra-red (NDIR )
Measurement range : 0 to 5,000 ppm display
Accuracy : ±75ppm or 10% of reading (whichever is  greater)
Resolution : ±1 
Response time : 2 seconds

Relative humidity sensor :
Type : Cmos 
Measurement range : 10 to 90%
Accuracy : 2.5%
Resolution : 0.1% 
Response time : 8 seconds

Temperature Sensor : 
Type : Thermistor 
- Measurement range : -80 to 75°C
- Accuracy : ±0.2°C from 0 to 70°
- Resolution : 0.1°C
Response time : 1 second

Power Supply : 
Battery : Four AA batteries 
Battery operation : 24 hours
External power supply : 6 V DC With 0.5A 

User guide for hygrometer ST501 Click-here


Terms & Conditions :

  • The above picture is for illustration only
  • All the above descriptions are subject to change without notice
  • Delivery charges will apply to buyers from Sabah, Labuan & Sarawak
  • International buyers, kindly contact us for shipping charges 
  • Free Shipping Within Peninsular Malaysia Only
  • Delivery : approx. 3 to 5 working days ( Peninsular Malaysia )
                    approx. 7 to 10 working days ( Sabah, Labuan & Sarawak, subject to courier delivery schedule )
  • Country of origin : Taiwan
  • Warranty : 1 year against manufacturing defects only

    REMARKS : For warranty claim :-
    - There is NO one to one exchange
    - Instrument need to sent back to manufacturer for rectification, repair & re-calibration



    For enquiries, kindly contact us @
    Tel : +6012 728 1063    
    Email : [email protected]