| Test particle size | 0.3, 0.5,1,3,5,10μm | 
        
            | Light source | Laser diode (lifetime greater than 30,000 hours) | 
        
            | Flow | 2.83 L/M(0.1cfm) | 
        
            | Counting efficiency | 50±10%@0.3μm, 100±10%@0.5μm | 
        
            | Measuring repeated relative deviation | ≤±10% | 
        
            | sampling time | User-defined (1 minute to 99 minutes)) | 
        
            | Sampling delay | User-defined (1 minute to 99 minutes) | 
        
            | Sampling frequency | 1 to 99 times or continuously | 
        
            | Alarm level | Class100 to Class 300,000 (FED209E standard) or 5 to 9 (ISO14464-1 standard) | 
        
            | test method | Single / repeat / continuous / timing / average | 
        
            | Data memory capacity | 1000 sets of measurement data | 
        
            | Error indication | xceeding the maximum count, the laser power is attenuated, exceeds the calibration flow (>±5%), and the battery is low. | 
        
            | Communication Interface | USB | 
        
            | Maximum communication rate | 12MBPS | 
        
            | Charging time | 3 hours, 12 hours for the first charge | 
        
            | Self-cleaning time | ≤10min | 
        
            | Maximum concentration | "+/-5% at 2000000 particles/ft3 (71000 Particle/L) | 
        
            | Screen display mode | LCD touch screen |