Description:  The 7530 AZ CO2 meter also can control the related instruments easily by two models, including the plant and human models, which could be override the controlling in low or high CO2 concentration.  An external CO2 sensing probe of 7530 AZ CO2 Controller is included to help user measure CO2 level in a closed space, the cable is 4.5 meter long to extend your measure spot 4.5 meter away from display.  The 7530 AZ CO2 controller could control the other connected devices, such as CO2 generator or ventilation fan. It could be used for the horticulture, greenhouse, hydroponics, organic indoor gardening, mushroom farm and lightening industry.  The 7530 AZ CO2 Controller was being designed and manufactured by AZ Instrument, a well experienced manufacturer of CO2 Controller.     Features:  Accurate 2-Channel low drift NDIR CO2 measuring.  Programmable CO2 zone value & CO2 center value to control output power on/off.  External CO2 sensor to be used in closed space.  Display real time CO2 value.  Display CO2 chart with variable time zoom levels.  Max. /Min. recall function.  Audible alarm warns CO2 concentration.  Target zone indicator.  Built-in Day/Night auto detection to override CO2 control.  Monitoring & Controlling CO2 value in Green house, residential and commercial building.  Powered by AC100~240 VAC directly.  Sensing probe cable is 4.5 meter long to extend your measure spot.  Installed with 3kA@300VAC fuse in meter to avoid the damage by power overload.  CO2 concentration alarm.  With Backlight.     Application:  The 7530 AZ CO2 Controller has the big LCD, which could show the CO2 concentration value with chart, so the 7530 AZ could be used for the CO2 monitor for the indoor air quality and green house CO2 measurement.  It could be also operated and met with all work space, office, hospital, school, station, residential, commercial building or home usage.     Specification:  CO2 Range: 0~5000 ppm;  CO2 Resolution: 1 ppm (0~1000 ppm);  5 ppm (1000~2000 ppm);  10 ppm (＞2000 ppm);  CO2 Accuracy (below 3000 ppm): ±50 ppm or ±5% of reading, whichever is greater;  CO2 Accuracy (above 3000 ppm): ±7% of reading;  Warm-up Time: 30 Seconds;  CO2 Response Time: ＜2 min for 63% of step change or, ＜4.6min for 90% step change;  LCD Size: 104(L) x 47(W) mm;  Meter Size: 158(L) x 106(W) x 50(H) mm;  Sensor Size: 124(L) x 33(W) x 26(H) mm;  Operating Temperature: 0~50℃;  Operating RH%: 5~95% RH (avoid condensation);  Storage Temperature: -20~60℃;  Storage RH%: 5~95% RH (avoid condensation);  Power Supply: AC 100~240 VAC;  Socket load: 5A@250VAC; 10A@120VAC;  Weight: 700g.     Package included:  1 x CO2 Meter (Controller + Sensor);  1 x Screws and tapes;  1 x English user manual.