Ultrasonic Sensor with Green/Red LED Indicator 2-in-1 Device by Parkeasy

Key Features –

• Installed directly above each parking space, ultrasonic sensors generate high frequency sound waves that shoot downward.
• The sensor constantly evaluates the echo which is received back by the sensor.
• Ultrasonic sensors calculate the time interval between sending the signal and receiving the echo to determine whether there is a large object like a vehicle underneath.
• Installing these sensors takes the guess work out of finding open parking spaces and guarantees always-updated parking data.
• Additionally, batteries can last several years even while sound wave is sent out every 3 second for sensing occupancy.