HANGZHOU ZETIAN TECHNOLOGY CO., LTD.
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DMS-200 Dust Monitor

DMS-200 Dust Monitor

DMS-200 Dust Monitor

Overview

DMS-200 dust monitor is a self-developed probe-in monitor, based on years of research on dust detection technology. Different from traditional back scattering dust monitor (such as DMS-100/MS-1000), DMS-200 installs a dust measurement module at the top of the probe, which directly stretches into the stack for dust measurement in close distance and it adopts laser forward scattering method to realize low detection limit.

Principle Of DMS-200 Dust Monitor


DMS-200 adopts the laser forward scattering principle to detect dust concentration in the measured stack. The detection schematic diagram is in the right.

Modulated laser irradiates on the dust particles in the stack and produces scattered light to emit around. The lens collects forward scattered light to converge and then enter high-temperature resistant fiber; transfer the optical signal to the detector; the signal processing unit will analyze the optical signals. The intensity of scattered light is in direct proportion to the PM concentration. The dust concentration from the current stack can be obtained through the specific transformation of signals from the detector.


Features Of DMS-200 Dust Monitor


• Adopt the laser forward scattering method to measure dust concentration; the lower detection limit is as low as 0.05mg/m3
• Employ gas curtain purging to protect laser and lens of detector end; purging gas is automatically heated by the temperature of the stack inside feeler lever and achieve positive pressure dust prevention inside feeler lever
• High-temperature resistance design of the probe part
• Automatic zeroing and calibration of the double optical path 
• Support manual range calibration
• Support automatic range calibration

Specification Of DMS-200 Dust Monitor


Measuring principle

Laser backward scattering

Measuring range

0~10mg/m3, 0~200mg/m3 (customizable)

Detection lower limit

0.05mg/m3

Indication error

≤±20%

Indication repeatability

10%

Flue gas temperature

<250℃(no condensation)

Ambient Temperature

--40℃~+45℃

Purging gas

(0.2~1)MPa, no water, oil or dust, consumption 5L/min

Probe length

1m, 1.5m (customizable)

Weight

15kg

COMM interface

Rs485 (default), Rs232 (customizable)

Analog output

Isolation 4-20mA output, maximum load 500Ω

Supply voltage

24VDC

HMI

IPC, APP(for MS-1000)

Power

<5W (when calibrating<15W)

Dimension

185mm* 185mm*1500mm


Installation Of DMS-200 Dust Monitor


1. The instrument is installed on the stack by flange
2. For the convenience of instrument installation, the height of the flange installation port shall be higher than that of guard bar
3. Power and gas source is connected at the back end of the monitor


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