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.
This Grove-ultrasonic sensor is a non-contact distance measurement module which is compatible with the Grove system. It’s designed for easy modular project usage with industrial performance.
Video available here
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.
Non Blind Zone Ultrasonic Module SDM-IO is a stable and measure the distance accurately ultrasonic module which provides 0cm - 1500mm non-contact measurement function,the ranging accuracy can reach to 3mm. Its performance can compare with SRF05/SRF02 ultrasonic distance measuring module, also it has non-blind design and fast response.
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.