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 Face A 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 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. at tom u a g ing lic ldin App and bui l Readon gica mati me - Ho toreolo e Auto - Me ricultur - Ag

RAIN SENSOR Capacitive change characteristic - Heater control (Table 3) It’s possible establish if it's raining or not. • The values contained in this page are considered typical properties only and are not intended to be used as specification limits. The above characteristics are to be verified in customer application. • The sensor can’t support temperature higher than 200 °C, otherwise the soldering will be damaged. 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...

Mechanical Dimensions ===> RC-SPC1K-NI Note :Enclouser Consideration For a good application, an enclousure that respects the following characteristics must be realized : Sensitivity Area Ÿ Only the active surface of the sensor (sensitivity area - Face A) must be exposed to atmospheric agents. Ÿ Face B must be protected as much as possible from the ingress of water by means of suitable sealants. 5.90mm 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...

Mechanical Dimensions Old Version ===> RC-SPC1K Note :Enclouser Consideration For a good application, an enclousure that respects the following characteristics must be realized : Sensitivity Area Ÿ Only the active surface of the sensor (sensitivity area - Face A) must be exposed to atmospheric agents. Ÿ Face B must be protected as much as possible from the ingress of water by means of suitable sealants. 5.90mm 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...

Rain Sensor Equivalent Circuit To 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- 5 / 6 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.

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.