Density (Consistency) Meter Principle and Feature

Density (Consistency) Meter Measurement Principle

The figure below illustrates the clear linear relationship between fluid density (consistency) and phase θ1 and phase θ2 (i.e., phase difference) of a wave transmitted through drinking water (0% density or consistency) and that passed through another fluid of different density (consistency) and comparing them against the wave's original phase.

Density (Consistency) Meter Measurement Principle image

Density (Consistency) Meter Measurement Principle image

Density (Consistency) Meter Feature

Accurate measurements are achieved since contaminents do not easily affect the phase difference measurement

Since contaminent do not easily affect the LQ series Density (Consistency) Meter, there is an excellent direct relationship between the phase difference and the concentration.
Accurate measurement is realized over a wide range from low concentration to high concentration.

Conventional ultrasonic and optical measurement

Microwave phase difference measurement Attenuation ⊿E2: that results from scaling of founding causes measurement errors in the positive direction.

Conventional ultrasonic and optical measurement image

Microwave phase difference measurement

Because scaling, founding do not easily affected phase, measurements are guaranteed to be accurate and reliable.

Microwave phase difference measurement image

High reliability, easy maintenance

No moving parts and no in-line projections guarantee high reliability and minimal maintainance requirement.
The absence of moving parts also greatly reduces costs for consumable like O-rings and bearings.

High reliability, easy maintenance image

Impervious to flow velocity

No moving parts means measurement of any fluid flowing through the system.

Impervious to flow velocity image

Continuous in-line measurement

Installation into piping allows continuous density (consistency) measurement of any fluid flowing through the system.

Easy operation

Setting the measurement range and calibrating the meter are easily done via key operations while viewing the LCD display.

Configuration diagram for communication

The LQ series has the HART protocol(*) as standard. We can check the density from far place connecting 4 to 20mADC current output line in Hand-held terminal.

Configuration diagram for communication image
  • * HART protocol (Highway Addressable Remote Transducer) is a communication protocol for industrial sensors recommended by the HCF (HART Communication Foundation).