Online Dust Concentration Detector

Applications:

Widely used in a variety of industrial uses, including: steel, power generation, petroleum, chemical industry, medicine, building materials processing, coal mining, cement and mining, packaging, environmental protection and dust removal equipment. Typical uses include bag filter bag breakage detection, or powdered materials recycling, product transfer total amount monitoring, gas line, or dust removal piping in various sizes, a variety of fuel concentration of boiler smoke emission monitoring.

Feature:

1. Dust concentration Tester consists of a sensor unit and transmitter unit consisting of integrated structure.

2. Special sensor for free electronic circuits, passive type. High sensitivity, not subject to vibration, no dust contamination, high reliability and long service life.

3. Transmitter output current signal and sensor unit is electrically isolated output electrical signals are transmitted without interference.

4. Two-wire (4-20mA) current signal output, strong anti-jamming ability, ease of long-distance transmission, no special requirements on the transmission wires. Output currents and dust concentration into the linear relationships to facilitate subsequent PLC data.

5. Modular design, can be individually replaced sensor unit and transmitter unit.

6. Long life design, full metal jacket, connectors. 

7. Explosion-proof: Exib I Mb, or Conventional-proof isolation barrier

Technical data:

1. Measuring range: 0-50/100/200/1000mg/m³.  

2. The pipe diameter: 0.1 m ~4 m.  

3. Accuracy: full scale ± 5%.   

4. Dust particle size: 0.1uM~200 uM.   

5. Operating temperature: -50℃ ~260℃ (450 ℃).   

6. Environment temperature: -40℃ ~85℃ (IECQ).  

7. Relative humidity: No condensation 90%.  

8. Gas velocity: 3M/s~30 m/s.  

9. The piping pressure: -0.1Mpa~2 Mpa.  

10. Environmental vibration: maximum amount of shock in a row, in any direction, at any rate: RMS 2G (20m/S2).   

11. Zero point drift: lower than 1%, full scale drift: lower than 1%.  

12. Probe structure: standard probe length 400, 600 (can be customized)

13. Output: two-wire 4~20mA isolated outputs.

14. Power supply: 15V~32V.

15. Display: Without display, there is signal output, the detector can receive the signal directly, because the install location is high, with display function no practical effect and signal is directly connected to PLC control cabinets, power plants, steel mills and other factories generally have control cabinet, via the control cabinet data will be displayed on the computer.

16. If need display function, kindly tell us.

17. If No PLC, need to install alarm, we will match the control box, setting up a dust concentration exceeded alarm. Kindly tell us.

Works:

It uses the most reliable measurement of electrostatic technology. Powder-like material in pneumatic conveying process, produces collisions and friction, such that the powder particles will lose electrons and form positively-charged particles and granules, powder flow rate changes and changes of concentration, the charge amount changes on a regular basis. The charge of dust particles forming an electrostatic field. Size can be measured using the principle of electrostatic induction electrostatic fields and change when the air contains dust particles inside the tubes when it passes a fixed sensor dust arising from the movement of the particles in weak current sensor and transmitted to the transmitter. Transducer filtering, amplification, and becomes a standard output values for a linear relationship with dust content.

Alarm settings:

1. Dust concentration on-line detector of alarm in PLC system settings can be recorded. Output signals into visible readings (such as mg/m/m³). Convert as follows, a case study of quantum 0-100 mg/m ³, 4mA correspond to 0mg,20mA corresponding to 100 mg, 1mA -4=6.25 mg.

2. Sets the horizontal line in the system, one is the normal working line, usually located in a full range of 20% position, due to the sophistication of the equipment and the use of each plant requirements are different, can also be adjusted according to the actual situation. Other is the alarm line, located in a full range of 40% position and time delays in processing, in order to avoid false alarms (such as in bag cleaning of bag filter in use due to increased dust content caused by instantaneous).

Remarks

15. Display: Without display, there is signal output, the detector can receive the signal directly, because the install location is high, with display function no practical effect and signal is directly connected to PLC control cabinets, power plants, steel mills and other factories generally have control cabinet, via the control cabinet data will be displayed on the computer.