The Massa Model M-300/150 Sensor measures target distances over a range of 4 inches (100 mm) to 8 feet (2.5 meters). It is a member of the Massa M-300 family that includes several models of RoHS compliant CE certified low cost liquid level sensors that produce detection ranges from as close as 4 inches (100 mm) to 15 feet (4.5 meters). Incorporating state-of-the-art ultrasonic technology, the sensors provide precision non-contact distance measurement for factory automation or industrial process control. The M-300 family of sensors stand out over all other systems because of their affordability, extraordinary ease of operation, genuinely user-friendly software, versatility in user-controlled outputs, and the ability to be set up without using a target. They transmit narrow beam sound pulses at a userselected rate (or they can be software triggered), process return echoes, and produce several outputs dependent on the position of the target. Operating from 12 to 24 V DC, the M-300/150 Sensor provides a linear output of 0 to 10 V DC, which is proportional to the measured distance to the target. This output voltage range can be easily reprogrammed to start and end anywhere between 0 and 10 V DC. The corresponding target distance span can also be set to start and stop at any two target ranges. In addition, this output voltage can be programmed to operate as a digital switch at a specified target setpoint distance. The system parameters and outputs are programmable via an RS-485 data link, thereby eliminating problems associated with adjustment potentiometers or pushbuttons.