With a housing of only 55 mm, the nano-15/CD sensors from microsonic with switching output are the smallest ultrasonic sensors in the world with an M12 threaded housing. The total length of the sensors, with connector, is 60 mm. The nano sensors have a 4-pin M12 connector and are taught via pin 2.
The temperature compensation for the nano-sensors has been improved significantly. Ambient temperature and other external factors can be compensated. This makes for an improved accuracy.