Filter monitor to detect the efficiency and function of filters and filtration systems.
Dust Monitor for qualitative measurement of dust concentration in dry process or flue gas.
The measurement principle is not suitable for use directly behind electrostatic filters
|||D-FW 231 Application|
|measured component||dust load|
|sample gas||air, flue gas, non flammable process gas|
|1 - 25 / 2-50 / 5 - 100 / 10 -200 / 20 - 400 mg/m3|
|flow velocity***||7-40 m/s|
|duct diameter||> 0,15 m|
|sample gas temperature||-20°C - 200°C / 500°C*|
|sample gas pressure
(relative to ambient pressure)
|-500 to +500 hPa, others on request|
|sample gas moisture||20 ... 80% rel. humidity|
|ambient temperature||-20 to +50 °C
|||D-FW 231 Technical Data|
|measuring principle||measuring the transfer of electrical charge from dust particles to an electrode in flowing sample gas|
|type||4 (7) wire transmitter, in situ, mounted at stack, probe is in contact with sample gas|
|system-components||D-FW 231 M Measuring head
D-FW 231 P probe/electrode
|measuring ranges||0 - 100% Tribo-value, 6 per micro DIP switch selectable ranges|
|output range||0- 100% Tribo value|
|process connection||G1" female thread, tube ID >= 36mm, L max. 100 (300*) mm
Adapters for flanges already mounted at the site on request
|||D-FW 231 M Measuring head
|measurement output||1 x 4–20 mA / 500 Ohm|
|control input||2 x transistor-input
zero check, integration
|supply||18 - 36 V DC; 0,2A|
|dimensions (hxwxd)||180 x 80 x 270 mm (without D-FW 231 P Probe)|
|material||housing: Al alloy, painted RAL 5017
probe connector: 1.4571
isolator: PTFE / ceramic*
|D-FW 231 P Probe|
|available rods||80, 250, 400, 700, 1000 mm|
|material||1.4571, others on request|
** the suitability of D-FW 231 for the listed ranges depends upon the kind of dust and its size distribution.
*** the measuring effect is dependant upon the flow speed.
Subject to technical modifications!