Model 3431 Compact Dust/Aerosol Monitor
Indoor Air Quality Investigation
Industrial Hygiene
Health & Safety Applications
Exposure Monitoring
Manufacturing Process Control
Features
- State-of-the-art components based on advanced light-scattering technology
- Compact and Light Weight
- Easy operation
Benefits
- Accuracy is ensured to meet the latest needs of dust measuring in extremely clean indoor environments
- All measurements can be made with a touch of a button on the front panel
- Allows the user to pre-enter the known concentration conversation value and let the unit automatically convert the dust count into mass concentration
Principle
As air sample enters the system, it travels through the impactor, which captures and removes larger particulates away from the sample. Smaller particulates become electrically charged and deposited on the piezo-crystal. The total mass of the deposited particulates affects the piezo-crystal's frequency. Since the change in frequency is proportional to the mass of the particulates, the actual weight of the particulates is obtained.
Specifications
| Measuring Method | Light Scattering Method |
| Measuring Object | Aerosol particles, f10µm or smaller |
| Measuring Range | 0.001 – 9.999mg/m3 (1 - 9999cpm, 1cpm=0.001mg/m3 for f0.3µm stearic acid particles) |
| Accuracy | +/-10% of reading +/-1cpm (or 0.001mg/m3) |
| Linear Characteristics | +/- 5% of reading |
| Measuring Time | 1 minute / 3 minutes / 10 minutes with built-in timer, and continuous mode |
| Light Source | Laser diode |
| Detector | Photo diode |
| Operations Environment |
35 – 104 (5 – 40 under 85%RH |
| Display | 4-digit LCD, dust count value (cpm), relative mass concentration value |
| Indicators | Cleaning, measuring mode, battery status, concentration conversion operation, zero point confirmation |
| Output | Analog output, 0 - 10,000cpm = 0 - 2.5V |
| Power Supply | AC 100V adapter and dry cell batteries (6 x AA batteries) |
| Dimensions | 6.4" x 2.4" x 39" (162 x 62 x 100mm) not including the nozzles |
| Weight | 2.2 Lbs. (1kg) not including batteries |
| Accessories | AC adapter, micro-screwdriver, alkaline dry cell batteries (6 x AA) shoulder strap |
| Options | Carrying case, Soft case, Analog output cable |
