Waterproof Type Duration Sensor has humidity indicator and easy to change drying cartridge. The Sensor has no moving parts and uses 3 photo diodes with are designed diffusers to make an analogue calculation of when it is sunny and the output is switched high or low to indicate sunny or not sunny conditions. The Sensor is designed with glass tube for improved resistance to scratching. The Sensor has spectral range from 400 to 1100 nm and has operational temperature ranging from -40 to 70 ° c. The Waterproof Type Duration Sensor requires power supply of 12 VDC.