This ready-to-install CO2 (Carbon Dioxide) Controller is equipped with a dual channel low drift NDIR sensor 4.6-meter long cable. Simple, affordable, and your best solution for more accurate control and monitor CO2 levels in a Greenhouse, residential, hydroponics, mushroom farm, plant factory, and so on. CO2 controller/tracer Built-in Day / Night Photo-Cell sensor Chart with variable time zoom levels 2-Channel low drift NDIR sensor for more accurate CO2 reading Split-type remote sensor with 4.6-meter long cable Foolproof "Hold Home" function Ready to use no initial setup or calibration needed 3 built-in main parameters (constantly display on screen): Ambient Carbon Dioxide Set Center value Set Zone Value MAX /MIN Display SPECIFICATIONS: (Typical test conditions, unless otherwise specified: Ambient Temp =23+/-3, RH=50%-70%, Altitude=0-100 meter) CO2 Measurement: Measurement Range: 0-5000ppm Accuracy: Accuracy at 0-3000ppm: 50ppm or 5% of reading, whichever is greater Accuracy over 3000ppm: 7% Display Resolution: 1ppm (0-1000); 5ppm (1000-2000); 10ppm ( 2000) Response Time: Less than 2min for 63% of step change or Less than 4.6min for 90% step change Warm-up Time: Less than 30 sec Power input: AC 100 - 240 VAC Operating Temperature: 32-122F (0-50) Storage Temperature: -4-140F (-20-60) Operating & Storage RH: 0-95%, non-condensing Dimension: Sensor Unit: 153x33x27mm (6.0x1.3x1.1inch) Control Unit: 195x145x44mm (7.7x5.7x1.7inch) Weight: 700g(24.7oz) Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC220V Colour:As Shown Material:Plastic Package Contents: 1 * Carbon Dioxide Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.