This pH/temperature/ORP 3-in-1 water quality controller has pH and ORP dual display dual control which can simultaneously measure and display pH/temperature value and oxidation reduction value(ORP). It has two BNC electrodes (pH and ORP) and two output power sockets. Both electrodes are removable and can be replaced at any time. With relay output power sockets, you can plug your own 110V/220V equipment, such as air outlet stone, ozone generators, oxygen pumps, carbon dioxide regulators, solenoid valves and other ORP and pH control devices. Simply set the desired Hi/Low pH/oxidation reduction value in the controller. If the pH or ORP value currently measured is lower than the set value, it will open the device. If the measured value is higher than the set value, it will close the device. Suitable for aquarium pool, soil-free growing, laboratory, and environment water. Features： The WiFi online pH ORP controller allows you to real time monitor the pH and ORP via your smartphone on the Tuya APP(for free), it is compatible with ios and Android system, perfect for 24 hours online monitoring. Widely used to test the pH / Temperature / ORP (Oxidation Reduction Potential) of water. With relay output power socket, you can control the pH & ORP value according to your requirements. You can replace the fuse easily and fast with external replacement. Detachable and replaceable pH and ORP electrodes. With dual power plug for air outlet stone, ozone generators, oxygen pumps, carbon dioxide regulators, solenoid valves and other ORP & pH control devices. Easy calibration of pH/ORP with just a mini-screwdriver and automatic temperature compensation. Clear LCD with backlight, 3 results displayed simultaneously. Easy to use and provide instant display of results. Test temperature in celsius / ℉(switchable units) and can online monitor and control ORP & pH for a long time. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, environment water, swimming pools, water purification systems, etc. APP Language Selection： English, French, German, Russian, Japanese, Korean, Spanish, Chinese, Traditional Chinese (Only supports Chinese and English in offline state) Specifications： Plug Type： AU / EU / US / UK (Optional) Material： ABS Power Supply： AC230, 50Hz (EU) / AC120V, 60Hz (US) APP Name： Tuya OS Requirement： Compatible with iOS and Android system Range： pH： 0.00~14.00pH             ORP： -2000~2000mV             Temperature： 0~50 celsius (32~122℉) Resolution： pH： 0.01pH                    ORP： 1mV                    Temperature： 0.1 celsius (0.2℉) Accuracy： pH： ±0.1pH                 ORP： ±5mV                 Temperature： ±1.0 celsius Alarm Setting Range： pH： 0.00~14.00pH                                  ORP： -2000~2000mV Temperature Compensation： 0~50 celsius (32~122℉) Operating Temperature： 0~50 celsius (32~122℉) Length of Sensor Line： 2m / 6.56ft pH/ORP/TEMP Controller Size： 160 * 95 * 40mm / 6.30 * 3.74 * 1.57in (Excluding Electrode Connector) Control Socket Size： 130 * 65 * 53mm / 5.12 * 2.56 * 2.09in (Including Fuse) Item Weight： 872g / 1.92lb Package Weight： 1075g / 2.37lb Package Size： 32 * 20.5 * 7.6cm / 12.60 * 8.07 * 2.99in Packing List： 1 * 3 in 1 Water Quality Tester   1 * pH Electrode 1 * ORP Electrode 1 * Temperature Electrode 2 * Suction Cup 4 * Screw 4 * Anchor Bolt 1 * User Manual (English)