ontrolli Wireless Modules RAIN SENSOR RC-SPC1K is an thick film technology rain sensor. This device is realized in Allumina (AL2O3) substrate, this material is endowed a big reliability from an electrical thermal point of view. The sensor consists of three parts : 1) Capacitive sensor (Face A) 2) Heater generator 3) Temperature Sensor The Face A is the sensitivity area (capacitiver sensor) this area is exposted to natural agent (rain); In dry condition the value of the capacitor is nominal 100pF, In presence of the rain the capacitance goes to high valued respect the dry contidion; The ratio changing is over 420%, in the table N.1 you can verify the capacitance change characteristics. On Face B is present the heating circuit the temperature sensor (NTC component) and the connection interface (six pads). Capacitor (Pins: 1-6) Electrical Parameters: Capacity Value : 100pF 10% R Value(heater) : 42 ohm 10% NTC Value Mechanical Dimensions: Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

adio RAIN SENSOR Capacitive change characteristic Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

ontrolli Wireless Modules RAIN SENSOR - Mechanical Dimensions Side A Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.

adio RAIN SENSOR - Application Rain Sensor Equivalent CircuitTo read the changing of sensor capacitance, it’s possible to do in two methods : - Frequency measurements (counter mode) - Picture 1 - Pulse measuremens (timer mode) - Picture 2 Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for Pag- 4 / 5 any possible lack or inaccuracy of the data and reserves the right to change in whole www.raai°contr°Nl.com or in part these information without notice.

ontrolli Wireless Modules RAIN SENSOR - Application CAPACITIVE SENSOR To make the temperature measure you can use the following schematics: CAPACITIVE SENSOR To drive the HEADER measure you can use the following schematics: It’s necesssary a low cost NPN transistor with IC< 500mA / VCE <25V for 12Volt standard bus voltage. Radiocontrolli s.r.l refuses any responsibility for irregular uses of the devices and for any possible lack or inaccuracy of the data and reserves the right to change in whole or in part these information without notice.