ENV200 series are the ultrasonic instruments that measures the density of suspended solid in liquid. It comprises of sensors and a junction box. ENV200 with PCM(Process Condition Monitoring) algorithm measures not only the size of received signal, which is often measured by conventional ultrasonic density meters but also observes changes in sound velocity and temperatures in the process. As it monitors operational status and water status in pipe and then decides the validity of each measurement, it contributes to increasing stability and reliability of the measurement. ENV200 utilizes the EEA (Envelope Energy Average) method that saves reception signal envelop and then calculates its energy, rather than using the reception signal’s amplitude change. ENV200 offers two types of sensors, spool-piece and clamp-on type to accommodate all field demands at installation.