A6 GSM / GPRS Module Development...
This module is based on an ultrasonic distance detection sensor with a 1cm accuracy and a maximum distance of 6m. Can be used in different environments, being waterproof.
This sensor is the enhanced version of the well-known HC-SR04 season sensor, a sensor used in a wide range of projects, obstacle detection, distance measurement and much more.
The Maxbotix LV-MaxSonar-EZ0 sonar module detects objects from 0 to 6.45 m with a resolution of 2.5 cm for distances greater than 15 cm. Unlike other remote sonar modules, LV-MaxSonar has virtually no dead zone: it can also detect small objects in front of the sensor, even if they touch the sensor.
This ultrasonic (sonar) range finder features real-time automatic calibration and noise rejection resulting in virtually noise-free distance readings even in environments with changing acoustic and electrical noise. The sensor detects objects from 0 to 7.65 m (25 ft) and has a resolution of 1 cm (0.4") for distances beyond 20 cm (8").