The invention relates to a PCB (2) for a clip (1) for attachment to an absorbent article (4), comprising a battery module (26), an impedance and electrochemical sensing module (21), a gas sensing module (22), a motion and position sensing module (23), and a
temperature sensing module (24) to obtain a first, second, third, and fourth measurement
signal, and a main
control unit (29) to control the modules (21, 22, 23, 24) and to determine an output based on the measurement signals, the main
control unit (29) comprising a
communication unit to exchange the measurement signals and / or output with an external device and / or
server by means of an
RF module, gateway, and WPAN protocol, and / or serial
data transmission.The PCB (2) comprises conductive pads (31, 32, 33, 34, 35, 36), with the first and second conductive pads (31, 32) for impedance measurement, the third and fourth conductive pads (33, 34) for charging the battery module (26), the first and fifth conductive pads (31, 35) for detecting the attachment of the absorbent article (4), and the fifth and sixth conductive pads (35, 36) for serial
data transmission and impedance measurement, or comprises conductive pads (31, 32, 33, 34) with the first and second conductive pads (31, 32) for impedance measurement, attachment detection, and serial
data transmission, and the third and fourth conductive pads (33, 34) for charging. The invention further relates to a clip (1) with the PCB (2).