Views: 0 Author: Site Editor Publish Time: 2026-08-13 Origin: Site
Semi-automatic coffee machines generate boiler steam with every extraction, so the inner
wall of the water tank is permanently coated with a layer of condensation plus coffee-oil mist.
After about six months, photoelectric level switches start reporting "tank full" when it is empty,
or "tank empty" when it is full — and the heating block burns out from dry-burning. Float balls
jam even more easily inside narrow tanks, especially when coffee grounds get in.
Xingkechuang's non-contact level sensor works on the capacitive principle: the electrode
sticks to the tank exterior, the wall plus the liquid form a variable capacitor, and the MCU
compares calibrated empty/full values to output a signal. The ΔC contributed by
condensation film, hanging droplets, and oil mist all sit below the trigger threshold — only a
genuine water-level crossing flips the output.
Models such as the XKC-Y29A measure around 20×12×4 mm and can be embedded in a
coffee-machine tank recess, penetrating 1–10 mm non-metallic walls (PP/ABS/AS/glass).
Shenzhen Xingkechuang Technology Co., Ltd. provides sample calibration services, so
manufacturers can swap out the old solution without changing molds.
