Cheapest Price Indoor Aqi Monitor - Popular carbon dioxide monitor in wall mounting or desktop for schools and offices – Tongdy

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Our mission will be to become an innovative supplier of high-tech digital and communication devices by furnishing benefit added structure, world-class manufacturing, and service capabilities for , , , Base on the business concept of Quality first, we would like to meet more and more friends in the word and we hope provide the best product and service to you.

Cheapest Price Indoor Aqi Monitor - Popular carbon dioxide monitor in wall mounting or desktop for schools and offices – Tongdy Detail:

♦ Real time monitoring room carbon dioxide

♦ NDIR infrared CO2 sensor inside with special Self Calibration. It makes the CO2 measurement more accurate and more reliable.

♦ More than 10 years lifetime of CO2 sensor

♦ Temperature and humidity monitoring

♦ Three-color (Green/Yellow/ Red) LCD backlight indicates ventilation level -optimal/moderate/poor based on the CO2 measurements

♦ Buzzer alarm available/disable selected

♦ Optional display 24h average and max. CO2

♦ Provide optional 1xrelay output to control a ventilator

♦ Provide optional Modbus RS485 communication

♦ Touch button for easy operation

♦ 24VAC/VDC or 100~240V or USB 5V power supply

♦ wall mounting or desktop placement available

♦ High quality with the excellent performance, best choice for schools and offices

♦ CE-approval

Power supply	100~240VAC or 24VAC/VDC wire connecting USB 5V (>1A for USB adaptor) 24V with an adaptor
Consumption	3.5 W max. ; 2.5 W avg
Gas detected	Carbon Dioxide (CO2)
Sensing element	Non-Dispersive Infrared Detector (NDIR)
Accuracy@25℃(77℉)	±50ppm + 3% of reading
Stability	<2% of FS over life of sensor (15 yr typical)
Calibration interval	ABC Logic Self Calibration Algorithm
CO2 sensor life	15 years
Response Time	<2 minutes for 90% step change
Signal update	Every 2 seconds
Warm up time	<3 minutes (operation)
CO2 measuring range	0～5,000ppm
CO2 Display resolution	1ppm
3-color backlight for CO2 range	Green : <1000ppm Yellow: 1001~1400ppm Red: >1400ppm
LCD Display	Real time CO2, Temp &RH Extra 24h average/max/min CO2 (optional)
Temperature measuring range	-20～60℃(-4～140℉)
Humidity measuring range	0～99%RH
Relay output (optional)	One relay output with rated switching current: 3A, resistance load
Operation conditions	-20~60℃(32~122℉); 0~95%RH, non condensing
Storage conditions	0~50℃(14~140℉), 5~70%RH
Dimensions/ Weight	130mm(H)×85mm(W)×36.5mm(D) / 200g
Housing and IP class	PC/ABS fireproof plastic material, protection class: IP30
Installation	Wall mounting (65mm×65mm or 2”×4”wire box) Desktop placement
Standard	CE-Approval

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Our company sticks into the basic principle of "Quality is definitely the life of the business, and status may be the soul of it" for Cheapest Price Indoor Aqi Monitor - Popular carbon dioxide monitor in wall mounting or desktop for schools and offices – Tongdy , The product will supply to all over the world, such as: Holland, South Korea, Lithuania, We are increasingly expanding our international market share based on quality products, excellent service, reasonable price and timely delivery. Please contact us at any time for more information.

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This company conforms to the market requirement and joins in the market competition by its high quality product, this is an enterprise that have Chinese spirit.

By Quyen Staten from Serbia - 2018.06.12 16:22

Although we are a small company, we are also respected. Reliable quality, sincere service and good credit, we are honored to be able to work with you!

By Sabina from Czech republic - 2018.02.08 16:45

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