The Massa Model M3 Family consists of battery operated wireless level sensors that intercommunicate using ZigBee RF Modules. Massa M3 Sensors produce detection ranges from as close as 4 inches (100 mm) to 35 feet (10.7 meters). Incorporating state-of-the-art ultrasonic technology, the sensors provide precision non-contact distance measurement for liquid level or industrial process control. The M3 Family of Wireless Level Sensors stands out over all other systems because of their affordability, extraordinary ease of operation, and ability to be installed and calibrated without using a target. They transmit narrow beam sound pulses, process return echoes, and report the distance to the target. The M3 measures and stores information such as range, temperature, battery voltage, and other sensor parameters at user-set time intervals. An internal pushbutton switch is used to commission the sensor onto the ZigBee network, and an LED identifies the operating mode. The package is rated for immersion and high pressure washing in accordance with IP67. The batteries are accessible for replacement.