Low Cost Insertion Liquid Densitometer

RBDM-C Low cost Insertion DENSITOMETER/CONCENTRATION METER  operates on the vibrating element principle, the element in this case being a tuning fork structure that is immersed in the liquid being measured. The tuning fork is excited into oscillation by a piezoelectric device internally, secured at the root of one tine. The frequency of vibration is detected by a second piezoelectric device, which is secured in the root of the other tine.


  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download

The RBDM-C Insertion Liquid Densitometer is based on the tuning fork technology. Fluid density is determined directly from the resonant frequency of the tuning fork immersed in the fluid.
A temperature sensor (PRT) is also fitted within the transmitter to indicate the operating temperature. It is an all-welded sensor that is designed for insertion into a pipeline, open tank, or closed tank.


The RBDM-C Low cost Insertion DENSITOMETER Features:


The RBDM-C Low cost Insertion DENSITOMETER Specification:


Technical parameter

Output signal: 

Output signal: 4~20mA

Power supply: 

24VDC (Don’t connect external resistor or serial PLC!)

Concentration range:


Density range: 




0.002 g/ml , resolution: 0.0001, repeatability: 0.0005


0.5% , resolution:0.1, repeatability:0.2

Explosion-proof Class

isolating explosion ExdII BT6

Maximum pressure


Medium temperature

0~60℃(liquid state)

Ambient temperature


IP Class


Viscosity of medium


Physical properties

Electrical interface


Process interface

DN20~80 Flanges

Wetted parts

316 stainless steel


Model Selection

The RBDM-C Low cost Insertion DENSITOMETER Model Selection:


The RBDM-C Low cost Insertion DENSITOMETER/CONCENTRATION METER  is ideally suited to applications where continuous, real-time measurement of density is required. For example, it can be used in process control where density is the primary control

parameter for the end product, or is an indicator of some other quality control parameter such as % solids, or % concentration.

Some Typical applications are:

  • Blending.
  • Mixing.
  • Evaporator control.
  • End point detection in batch reactions.
  • Interface detection in continuous separators.
  • Interface detection in multi-product pipelines.


  • Typical industries include:
  • Oil and petrochemical.
  • Brewing.
  • Food.
  • Pharmaceutical.
  • Minerals processing (clays, carbonates, silicates, etc.)



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