Tongdy Control Technology Co. Ltd

We are offering transmitter. designed for real time detecting carbon dioxide, air quality, temperature or relative humidity in air ducts. ndir infrared co2 sensor inside with special self calibration and up to 15 years lifetime. It makes co2 measurement more accurate and reliable. mix gases sensor with high sensitivity for vocs from new furnitures, wall coverings, office equipment, cleanser etc. And other pollutants from smoking and cocking etc. combined temperature and humidity digital sensor provides a high accuracy measurement in full range. provide up to 3 analog outputs (010vdc or 420ma or 05vdc) for co2, air quality (voc) and temperature or relative humidity. modbus rs485 interface with outputs for co2, temperature, humidity and air quality (voc). with lcd or without lcd selectablelcd display real-time measurements of co2, air quality (voc), temperature and relative humidity. simple and smart design and installation of sensor probe with a water-proof and porous film extendable probe meets more air duct systems24vac/vdc power supply. eu standard and ce-approval. detection focuscarbon dioxide (co2)indoor co2 level is a universal accepted parameter for the condition of indoor ventilation and air quality. A time period can be preset from 1 to 24 hours, e.g. 5 hours, then the monitor can display co2 average level duringthis period, which provides an objective and true data for the measurement of the air quality in a certain space. non-dispersive infrared (ndir) co2 sensor with more than 10-year lifetimeabc self-calibration technology guarantees reliable co2 measurementco2 range: 02000ppm/05000ppm optionalrapid response, high stability and consistency air quality (voc)the air quality sensor is a mix gases sensor with high sensitivity for voc (kinds of volatile pollutant gases) such as ammonia, toluene, formaldehyde and cigarette smoke, alcohol, h2s, and carbon monoxide. So it is very suitable to detector the general indoor air quality in real time and long term. It responds quickly to any change of the concentration of such gases. built in the semi-conductor mix gases sensor57 years life timehigh sensitive to volatile gases like ammonia, toluene, formaldehyde, cigarette smoke, alcohol, h2s, etc. small volume, lower consumption temperature and humiditycombined digital temperature and humidity sensor with high accuracy and stability. It also has compensation toco2 and air quality which makes the measurements more accurate by minimizing environmental effects. typical applications residential houses, exhibition halls, restaurants, shopping malls, sports gymnasiums, conference rooms, etc. museums, theaters, offices, classrooms, train stataions, airports, etc. specifications monitoring parameters co2 air quality (voc) temperature relative humiditysensing element non-dispersive infrared detector (ndir) semiconductor mix gases sensor digital combined temperature and humidity sensormeasuring range 02000ppm(default)05000ppm(selectable in the order) 030ppm 050(32122) (default) 0100%rhdisplay resolution 1ppm 5ppm 0.1 0.1%rhaccuracy@25(77) 50ppm + 3% of reading ------- 0.4 (050) 3%rh (20%-80%rh)life time 15 years (normal) 57 years 10 yearscalibration cycle abc logic self calibration response time.