Brief introduction: Taiwan SUNTET online conductivity and resistivity monitor EC-4300, with external dimensions of 144 * 144 microcomputer design, outdoor waterproof design suitable for wall mounted, panel mounted, and circular tube mounted large LCD display screens, equipped with operation status and special symbol display backlight sensors, automatic and manual backlight setting output provides electrode automatic cleaning device contacts, program setting output provides automatic and manual range switching, accepts two pole and four pole electrode input, manual/automatic selection temperature compensation function, password lock and combination key to enter the setting and calibration mode design, enhances safety protection equipment with 2-channel 0/4~20mA output corresponding settings