Development of Tuning-Fork Liquid Densitymeter

Brief Description

The instrument utilizes the technique of measuring the resonant frequency of a tuning fork vibrating structure. Two piezoelectric crystals are mounted at the base of two tines of the fork which is immersed in the process liquid. One of these crystals is excited by a signal sweeping from 800 Hz to 1 KHz thereby bringing the whole structure into mechanical oscillations. The amplitude of these vibrations is sensed by the other crystal. The maximum amplitude of vibrations corresponds to the resonant frequency of the whole system mass which includes the liquid. The resonance frequency is calibrated in terms of density.

Application

• Petroleum
• Chemical
• Dairy
• Paper
• Food processing industries etc.

Features

• The sensor is rugged and relatively insensitive to mounting position
• Can be installed on-line if need arises
• Portable
• Directly interfaciable to computer
• High signal to noise ratio achieved through frequency modulation
• Extremely user-friendly software

Specifications

Density Range : 0 – 3000 kg/m3
Sensor Material : Stainless Steel 316
Accuracy : ± 1 kg/m3
Repeatability : < ± 0.1 kg/m3
Temperature Range : - 500C to 1000C
Output : BCD, 4-digit LED display, RS-232-C interface

Contact:

Central Scientific Instruments Organisation
Sector-30, Chandigarh,
Phone: +91-172-2637492
Fax: +91-172-2657614
Email : cemi2010@gmail.com