Description 1. Widely used to test the pH / Temperature / (electric conductivity) of water. With relay output power socket, you can control the pH value according to your requirements.2. You can replace the fuse easily and fast with external replacement. Detachable and replaceable pH electrode. With power plug for air outlet stone, oxygen pumps, carbon dioxide regulators, solenoid valves and other pH .3. Test the with both us/cm and /cm units at will. Easy calibration of pH/ with just a mini-screwdriver and automatic temperature compensation.4. Clear LCD with backlight, 3 results displayed simultaneously. Easy to use and instant display of results. Test temperature in / (switchable units) and can online monitor and control pH for a long time.5. Apply in water sources, soil-free growing, aquarium, hydroponics, laboratory, spas, environment water, swimming pools, water purification , etc.Operating Instructions1.Connecting AC power supply(Make the ).2.Connecting the pH electrode,TEMP electrode into relative electrode socket.3.Remove the protective cap,clean the electrode with distilled water,put pH electrode, electrode,temperature electrode,into liquid which is to be test,and stir lightly.Wait until the digital is stable,read the final value.Type: pH/TEMP-2823Range: pH: 0.00 ~ 14.00pH; : 0~1999us/cm (0~19.99ms/cm)Temperature: -50 ~ 70 (-58 ~ 158)Resolution: pH: 0.01pH; : 1us/cm (0.01ms/cm)Temperature:0.1(0.2)Accuracy: pH: 0.1pH; : 2%F.STemperature: 1.0(2)Temperature Compensation: 0 ~ 50 (32 ~ 122)Working Temperature: 0 ~ 50 (32 ~ 122)Input Resistance: 10^12 ohmAlarm Setting Range: pH 3.50pH~10.50pHLength of Sensor : 2m / 6.56ftInput Voltage: AC220V (EU)Plug Type:EU Plug,it applies to Indonesia, , , , and so onDisplay Type: DIGITALcolor:BlueMaterial:plasticPackage Contents:1 x 3 in 1 PH MeterOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.