LQ300 Microwave Density Meter

Source: Toshiba MRI and Screening Inc.

LQ300 Microwave Density Meter
The company's new method of measurement is called "the microwave phase difference method".
The company's new method of measurement is called "the microwave phase difference method". The meter can detect, in principle, both the suspended solids and the dissolved solids. The unit can be used to measure solids content up to 50% and provides a continuous output for both real time measurement and control. Since the unit has no moving parts, no in-line projections, or consumable components it offers high reliability and low maintenance operation.

The LQ300 Microwave Density Meter uses a new principle, microwave phase difference measurement, to determine the density (consistency) of fluids flowing through pipes. This method exploits the way fluid density affects the propagation of microwaves when they pass through it. This allows the reliable measurement of the fluid's density by monitoring the difference in microwave phase between the original wave and one passed through the measured fluid. Unlike the method monitoring the attenuation of a transmitted wave, measuring fluid density by observing a wave's phase difference is unaffected by flow velocity and is resistant to the affects of contamination, scaling, fouling, and or bubbles.

Product Applications:

  • Waste Water- Sludge (excess, digested, or dehydrated)
  • Pulp and Paper- Consistency measurement of hardwood, softwood, mechanical and chemical pulp, bleached and unbleached pulp, DIP (deinked pulp) hemp pulp and pulp sludge as well as various additives.
  • Cement- Cement milk
  • Building Industry- Raw material for interior and exterior boards
  • Fibers- Organic and inorganic fibers suspended in solution
  • Food- Starches or processes measuring percent total solids

Basic Specifications:

  • Technology- (MPDM) Microwave Phase Difference Method
  • Measurement Range- Span: 1% to 50% TS (Total Solids)
  • Electrical Resolution- 0.001% TS
  • Factory Resolution- 0.05% TS
  • Meter Size- 3 in., 4 in., 6 in., 8 in., 10 in., and 12 in.
  • Fluid Temperature- 0 to 50° C (32 to 122° F) Standard, 0 to 90° C (32 to 194° F) Optional
  • Ambient Temperature- 0 to 50° C (32 to 122° F)
  • Output Signal- 4-20 ma plus HART protocol

Toshiba International Corporation, 13131 W. Little York Rd., Houston, TX 77041. Tel: 713-466-0277 or 800-231-1412. Fax: 713-896-5225.