The DLO-M1 sensor measures the density of liquids in a microelectromechanical system (MEMS). Within the MEMS, the liquid is directed to an omega-shaped microchannel, known as the omega chip. This tiny silicon tube – it is hardly thicker than a hair – is vibrated for the purposes of the measurement. The density of the medium to be measured can be derived from the natural frequency of this oscillation: The denser the medium, the smaller the oscillation. Thanks to the measurement in the MEMS, the sensor is only 30 x 80 x 15 mm³ in size and can therefore be accommodated even in tight spaces. The high-precision measurement results are immediately available, enabling continuous measurement during the process. The density of liquids depends on their temperature. To compensate for this effect, an integrated platinum resistor measures the temperature of the liquid. The measured values are transmitted to the higher-level system via an RS232 interface. The sensor uses an ASCII command protocol in the TrueDyne Sensors standard for this purpose.