D-FW 231
Filter Monitor
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.
Overview
- In situ measurement, continuous measurement
- Qualitative dust measurements for monitoring the functions of filters
- Single-sided mounting on the channel
- No moving parts within the duct
- Easy installation, adjustment and maintenance without a PC
Your benefit
- Compact and cost effective solution
Small housing and low system cost - Space-saving and easy installation
One-sided Installation without alignment and the simple measuring principle with analog output allows easy installation and setup - Low operation costs
No purge air required - Suitable for harsh flue gas pressure conditions
The filter monitor is suitable for flue gas pressure up to 500 hPa
Applications
- Power Plants
- Bag-filter of any kind
- Dust in the manufacturing industry
- Incinerators
- Crematoria
The measurement principle is not suitable for use directly behind electrostatic filters.
Technical Data
| Measured component | dust load |
| Flue gas | air, flue gas, non flammable process gas |
| Flue gas dust concentration | 1 ... 25 to 20 ... 400 mg/m3 |
| Flue gas flow velocity | 7 ... 40 m/s |
| Stack/ duct inner diameter | > 0.15 m |
| Flue gas temperature | above dew point, up to 200 °C standard, up to 500 °C option |
| Inner stack/duct pressure (relative to ambient pressure) | -500 ... +500 hPa |
| Flue gas moisture | 20 ... 80% rel. humidity |
| Ambient temperature | -20 ... +50 °C |
| Measuring principle | Measuring the transfer of electrical charge from dust particles to an electrode in flowing sample gas |
| Type, mounting location | 4 (7) wire transmitter, in situ, mounted at stack, probe is in contact with sample gas |
| System-Components | D-FW 231 M Measuring device 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 |
| Analog outputs | 1 x 4–20 mA, 500 Ohm |
| Digital input | 2 x Transistor-Input for zero check, integration |
| Power supply | 18 - 36 V DC; 0.2A |
| IP protection class (IEC 60529) | IP65 |
| Dimensions (hxwxd) | 180 x 80 x 270 mm (Without D-FW 231 P Probe) |
| Weight | 1.9 kg |
| Material | Housing: Al alloy, painted RAL 5017 Probe connector: 1.4571 Isolator: PTFE (standard), ceramic (option) |
| Dimensions | Length: 80, 250, 400, 700, 1000 mm |
| Material | 1.4571 |
| Remarks |
|