... ,memory, leak current detection, water level detection&display(two colour LED) function etc. a. Apply 8 bit microcomputer of NEC or ... °C c. The display is the double 7segments LEDs or LED module or LCD(backlight) d. It can control valve, electric heater ... ,memory, leak current detection, water level detection&display(two colour LED) function etc. h. It has leak current, no water, overflow ...