Online PM Monitor
Overview
BPM-200
Continuous Particulate Monitor
The BPM-200 measures ambient particulate by using well applied beta ray attenuation technology. PM2.5 measurement can also be achieved by introducing corresponding cyclone.
Key Features
- Compliance with US EPA reference method
- Automatic continuous operation up to 60 days
- Auto zero and span calibration
- Low maintenance and operation requirement
- User selectable measurement cycle
- Various output with serial printer and GPRS as optional
- Stable and long life time radiation source
Principle
Particulate matter sample is pulled by a vacuum pump and concentrated on filter tape spot, the concentrated sample is advanced to measuring position where between beta ray source and detector.
An attenuation signal of beta ray is detected which represents the mass of sample particulate. Particulate concentration can be determined by dividing mass to volume which has been strictly controlled during sampling with fixed flow rate.
Technical Data
| Principle | Beta ray attenuation | |
| Performance Specification | Resolution | 1 μg/m3 |
| Lower Detectable Limit | 5 μg/m3 | |
| Reproducibility | < 7% | |
| Range | 1 mg/m3 to 10 mg/m3 Selectable | |
| Sample Cycle | 1~360 min | |
| Sample Flow Rate | 16.7 L/min | |
| Flow Accuracy | ± 1%F.S. | |
| Flow Stability | ± 2% F. S. | |
| Beta Source | 14C (Carbon -14), 10 μCi | |
| Beta Detector Type | GM tube | |
| Filter Tape | Glass fiber filter tape, 60 days of operation | |
| Environmental | Operating Temperature | 5~40°C |
| Ambient Humidity | 0~90% RH, noncondensing | |
| Ambient Pressure | 86~116 kPa | |
| Physical and Electrical | Power Supply | 220±10% VAC, 50±1 Hz |
| Power Consumption | 350W with pump and heater | |
| Dimensions and Weight | 310mm(H) x 430mm(W) x 400mm(D), 25kg | |
| Communication | Communication Port | RS232, RS485 |
| Digital I/O | Two digit input, four-digit output | |
| Analog I/O | Two (4~20)mA , 1~5V/0~5V output Two (4~20)mA input | |
| Other | Optional serial printer and GPRS |