Here is a smart motion sensor that helps you protect your home. The Fibaro Smart Z-Wave Multi-sensor can detect temperature, light, and vibrations. It sends you alerts on your smartphone or tablet when activity is detected. The device is smart enough to distinguish between a pet or a person.
The multi color LED eye gives you feedback on motion and temperature. There is also a built-in tamper protection feature if the sensor is moved. You can change the color and intensity of the sensor to your liking. Costs under $60 at this time.