Cemtrex Products

Advanced dust monitor with semiconductor laser.

The system setup:

Features of LM3188 AZL:

Direct continuous measurement of opacity or optical density.

Small, lightweight and easy installation.

Light source is a semiconductor laser (Advantages listed in following section).

Manual and automatic zero and calibration.

Fast assembly due to simple cabling & small holes required in the stack.

Adjustable alarm values and alarm relay.

Linear voltage output 0-1 V and current output 4 ... 20 mA

Digital LCD-display and analogue display for D-value

4 operation ranges (0...0,03 D, 0...0,1 D, 0...0,3 D, 0...1,0 D)

Advantages of a semiconductor laser:

A very compact and intense light beam, the diameter is only a few millimeters. This means that only small holes (20 - 50 mm) are needed in the stack, simplifying the installation.
Good stability and long life. In contrast to designs that use more traditional light bulbs, needing constant compensation, the laser source is relatively immune to the aging effect. The typical life span of a semiconductor laser is up to 10 years.
Due to the high intensity of the laser the device can penetrate higher dust densities.
Operation with known, clearly defined wavelengths. This makes the theoretical calculations and their results more predictable as opposed to conventional sources that operate over a broad range of wavelengths and spectrum changes with age.

Typical applications:

Continuous particle emission control in applications where the measuring path is maximum 40 meters.
Max. Dust content 2g/m3.
This model is most commonly used in power plants that burn oil, coal or bio-fuel, in cement plants or in steel or iron furnaces.