Simultaneously measure and display pH value and redox value (ORP). It comes with 2 BNC electrodes (pH and redox) and 2 output power sockets. Both electrodes are detachable and can be easily replaced at any time.As for the relay output power socket, you can plug your own 110V/220V equipment into it, such as air outlet stones, O3 ozone generator, oxygen pump, CO2 regulator, solenoid valve and other ORP & pH control equipment. Just set the required high/low pH/redox value in the controller.If the currently measured pH or redox value is lower than the set value, it will turn on the device; if the measured value is higher than the set value, it will turn off the device.Application and purpose: Fish hatcheries, winemaking, swimming pools (bathrooms), laboratories, water treatment, schools and colleges, flora, used to analyze liquids (pH), ponds, various industrial applications, fish farming, koi, brocade Carp, Bowlerley, pond, swimming pool, spa, swimming pool, swimming pool, liquid analysis, orchid reproduction, breeding, growth, etc.You can pay close attention to different water quality parameters in the water tank in this way There must be a perfect way to automate and adjust the control equipment in the aquarium to eliminate lethality and maintain a healthy water systemPlug Type: EU Plug, it applies to Indonesia, Germany, France, Spain, Italy and so on.size:160x102CMMaterial:plasticcolour:bluePackage Contents:1 * dual aquarium controller for pH and ORP1 * detachable 300cm pH electrode1 * removable 300cm ORP electrode2 * Rubber cable holder with suction cap1 * metal wall mountOnly the above package content, other products are not included.Note: Light shooting 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.