The Rhosonics CDM stands for Chemical-based-slurry Density Meter and that category ofinstruments allows measuring density in real-time. The CDMs have a robust design with sensorsthat are made of highly corrosion and abrasion-resistant materials to withstand rough processconditions.

Features and benefits

The major features and benefits of the CDMs are:
• Real-time density monitoring
• Safe technology (non-nuclear)
• Corrosion and abrasion-resistant sensors
• Easy operation and installation

Measuring methods

• Acoustic impedance The acoustic impedance is the reflection ofultrasonic energy at the interface between thesensor and slurry or liquid.

• Attenuation The attenuation is the loss of energy causedby solids in suspension in the liquid when theultrasonic wave travels from the sender to thereceiver.

• Speed of sound The speed of sound is determined by measuringthe time that the ultrasonic wave takes to travelover a known distance in the liquid, known as thetime of flight.

• Temperature The temperature is measured by a Pt100, used to obtain an accurate speed of sound.