any time. With relay output power socket, you can plug your own 110V/220V equipment, such as air outlet stone, oxygen pumps, carbon dioxide regulators, solenoid valves and other pH control devices. Simply set the desired Hi/Low pH value in the controller. If the pH 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.

Specifications:
Plug Type: AU / EU / US / UK (Optional)
Material: ABS
Power Supply: AC230, 50Hz (EU) / AC120V, 60Hz (US)
APP Name:
OS Requirement: Compatible with iOS and Android system

Range: pH: 0.00~14.00pH
            TDS: 0~19990ppm, 0~199.0ppt
            Temperature: 0~50℃ (32~122℉)
Resolution: pH: 0.01pH
                   TDS: 1ppm(<1000ppm), 10ppm(>1000ppm), 0.1ppt
                   Temperature: 0.1℃(0.2℉)
Accuracy: pH: ±0.1pH
                TDS: ±2%F.S
                Temperature: ±1.0℃
Alarm Setting Range: pH: 0.00~14.00pH
                                 TDS: 0~20000ppm
Temperature Compensation: 0~50℃ (32~122℉)
Operating Temperature: 0~50℃ (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 / 1.92oz
Package Weight: 1077g / 2.38lb
Package Size: 32 * 20.5 * 7.6cm / 12.60 * 8.07 * 2.99in

Packing List:
1 * 3 in 1 Water Quality Tester with TDS Electrode
1 * pH Electrode
1 * Temperature Electrode
2 * Suction Cup
4 * Screw
4 * Anchor Bolt
1 * User Manual (English)