PH-803W is a new digital wifi monitoring acid-base and redox controller which can measure and display the pH value and redox value (ORP) at the same time. It has 2 BNC electrodes (pH and redox) and 2 output sockets. It has fast response speed and easy pH calibration. The two electrodes are detachable and can be easily replaced at any time without the need to purchase and replace the entire device. At the same time control other equipment related to pH and ORP to adjust pH and ORP value in liquid. Precisely, easily and automatically monitor and control pH and ORP values and other control equipment related to pH and ORP. With strict quality and safety certification, it can ensure reliability, stability, long service life and trouble-free service life, and is easy to carry, using the dead zone protection function when When using or installing the device, you can choose to mount it to the wall or hang it in a solution container. The types of products are: 110V and 220V. Measuring range PH: 0.00 ~ 14.00pH ORP: -1999 ~ 1999mV Accuracy PH:±0.05PH ORP: ±5mV Resolution PH: 0.01pH ORP: 1mV Set Range PH: 3.50 ~ 10.50pH ORP: -500 ~ 500mV Relay Contact: 5A for AC 110V or 220V Environment Operation Temperature : 0 to 50 degC (32 to 122 degF) Ambient Humidity : 90 or less than 90 % R. H. Power Requirement : AC110V plusmn10% 60Hz / AC220V plusmn10% 50Hz Power Consumption : 2 Watts Voltage: 110V or 220V Calibration： Calibration pH: A. In pH6.86 Calibration solution 1. Connect AC power. Immerse the ph electrode in a pH6.86 buffer solution and shake it gently until the reading stabilizes. 2. Long press [b], until the “pH” indicator flashes. PH6.86 is displayed on the first line. 3. (1) Short press [a] to exit current mode if ph6.86 calibration is not performed. Then the device returns to measuring mode. (2) Short press [c] to complete the pH 6.86 calibration when the second line reading is stable if the pH6.86 calibration is performed. The device then automatically returns to measuring mode. 4. The pH6.86 calibration is complete. B. In pH4.00 Calibration solution 1. Connect the AC power. Immerse the ph electrode in a pH 4.00 buffer solution and shake it gently until the reading stabilizes. 2. Long press [e], until the “pH” indicator flashes. pH 4.00 is displayed on the first line. 3. (1) Short press [a] to exit current mode if pH 4.00 calibration is not performed. Then the device returns to measuring mode. (2) Short press [c] to complete the pH 4.00 calibration when the second line reading is stable if the ph4.00 calibration is performed. The device then automatically returns to measuring mode. 4. The pH 4.00 calibration is complete. ORP calibration: This meter has been precisely precalibrated for mV range at the factory. And there is no need for users to calibrate. PH-301 On-line pH Controller Meter Tester with Optional HI/LO Action 0.00~14.