If you are searching an ultrasonic ranging module, the HC-SR04 is good choice: Its stable performance and high ranging accuracy make it a popular module in electronic market. It's cheaper than an IR range finder with similar range accurancy and distance.
The 80cm Infrared Proximity Sensor is a General Purpose Type Distance Measuring Sensors, this sensor takes a continuous distance reading and returns a corresponding analog voltage with a range of 10cm (4") to 80cm (30"). Can be used in TVs,personal computers ,cars and so on.
There are many ultrasonic ranger module on the market, but sometimes, these kind of sensor needs to work in conditions more than the Lab. This water proof ultrasonic sensor meets this requirement. It has a good performance and almost the same usage of HC-S04 module.
This presentation will provide an overview of the VL610X technology. Additionally, it will review features of the range and ambient light sensors. Finally, it will introduce targeted applications and application examples.