D-FW 231 Filter Monitor

Filter monitor for efficiency monitoring after filter plants and for continuous dust measuring in dry emissions
The D-FW 231 is a filter monitor to detect the efficiency and function of filters and filtration systems. It is a dust Monitor for qualitative measurement of dust concentration in dry process or flue gas.The filter monitor uses the triboelectric effect to determine dust loads in flowing gases. The electrical charge which the dust particles experience due to friction is picked up by a probe protruding into the dust channel and converted into a measuring signal by electronics. The measuring signal is proportional to the dust concentration and is calibratable at a constant gas speed.

The D-FW 231 can be used in various applications such as power stations, dust extraction plants in the production industry, waste incineration plants and crematoriums

Brochure

Dust monitor for industrial stacks

Exclusive Features
DR-290

Low operational costs

No purge air required, no preventative filter exchange necessary and minimal maintenance required

Space-saving and easy installation

One-sided Installation without alignment and the simple measuring principle with analog output allows easy installation and setup

Compact and cost effective solution

Small housing and low system cost

Convenient operation

with remote access option and easy maintenance

Suitable for harsh flue gas pressure conditions

The filter monitor is suitable for flue gas pressure up to 500 hPa

Monitoring

Ideal for monitoring bag filters

Specifications

Filter Monitor
D-FW231

Analytical Performances
Measuring principle Tribo electric: measuring the transfer of electrical charge from dust particles to an electrode in flowing sample gas

Measurements dust load

Measuring range 0 – 100% Tribo-value, 6 per micro DIP switch selectable ranges

Flue gas air, flue gas, non flammable process gas

Flue gas dust concentration 1 … 25 to 20 … 400 mg/m³

flue gas temperature above dew point up to 200°C, optional up to 500°C, flue gas humidity <80% [/av_iconlist_item] [av_iconlist_item title='Outputs' link='' linktarget='' linkelement='' icon='ue8ab' font='entypo-fontello' av_uid='av-qdklss1'] Process connection G1″ Female thread, tube ID >= 36mm, L max. 100 (300*) mm

Power Supply 24 VDC, 5 VA
115/ 230 VAC, 50/ 60 Hz, 10 VA*

Digital input 2 x Transistor-Input for zero check, integration

Analog Output 1 x 4–20 mA, 500 Ohm
Construction
Protection IP65

Weight
probe: max. 4.5 kg
control unit: 3 kg

External dimensions

Probes: 80, 250, 400, 700 mm

Measuring device: 180 x 80 x 270 mm

Options

● Various mounting options (flange, connection piece)
● Probe rod lengths 80, 250, 700, 1000 mm
● control unit with digital display
● Measuring gas temperature up to 500°C
● Ex version D-FW 240/Ex
● Weather protection cover

Measured Parameters

D-FW 231

The filter monitor uses the triboelectric effect to determine dust loads in flowing gases. The electrical charge which the dust particles experience due to friction is picked up by a probe protruding into the dust channel and converted into a measuring signal by electronics. The measuring signal is proportional to the dust concentration and is calibratable at a constant gas speed.

MEASURING PARAMETER	RANGE
Dust mass flow	0…100% (flue gas velocity >5 m/s)
Flue gas dust concentration	1…25 to 20…400 mg/m3
Floe gas flow velocity	7…40 m/s
Detection limit	2% of measuring range/month

System Components and Integration

D-FW 231
Filter Monitor

System Components

D-FW 231 M Measuring device
D-FW 231 P probe/electrode

Type, mounting location

4 (7) wire transmitter, in situ, mounted at stack, probe is in contact with sample gas

Options

Various mounting options (flange, connection pieces)
Probe rod lengths 80, 250, 700, 1000 mm
Control unit with digital display
Measuring gas temperature up to 500°C
Ex version D-FW 240/Ex
Weather protection cover

Measuring Device

D-FW 230 B

Overview

supplies D-FW 231 or D-FW 240EX with 24VDC
includes a display
allows zero check of D-FW 231 and D-FW 240EX from external
includes a limit alarm contact
allows selection of measurement integration
to be installed in Non Ex area
can be mounted in a distance of up to 200m to sensor

DOWNLOADS

Certificate of conformity

Environmental Monitoring Questionnaire

Stack Monitoring Solution

Industrial Stacks

With stricter environmental regulations optimisation of the combustion process for reduced pollutant emission and higher fuel efficiency is a major objective for manufacturers.

Monitoring solutions and applications for stack industries

Oxygen concentration monitoring, in combustion flue gas to ensure fuel efficiency of the industrial burners.

Low dust concentration monitoring, to ensure continuous measure and control dust emissions to all stacks industries.

Continuous emission monitoring applicable for a wide range of applications, such as:

incineration plants
waste incineration plants
power plants
cement plants
metal industry
on plants according to 2001/80/EC LCPD
on plants according to IED 2010/75/EU

Opacity measurements in flue gas e.g.

on cruise and container ships
on plants in accordance with US EPA 40 CFR 60 PS1

D-R 320

Opacity and Dust monitor for industrial stacks

D-R 808

Dust monitor for low to medium concentrations

D-R 820 F

Dust concentration monitor for wet gases

D-R 120

Automatic sampling device for gravimetric dust measurements

D-R 220

Dust and optical opacity monitor

Emissions and Process Gas

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D-FW 231 Filter Monitor

Dust monitor for industrial stacks

Specifications

Analytical Performances

Construction

Measured Parameters

System Components and Integration

Measuring Device

DOWNLOADS

Stack Monitoring Solution

Industrial Stacks

D-R 320

D-R 808

D-R 820 F

D-R 120

D-R 220

Cases Studies

SERVICES & PRODUCTS ENQUIRIES

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