| Applications 
 | 
          
            | 
                
                  
                    | 
                        IAQ InvestigationsIndustrial HygieneOccupacianal Health & SafetyProduct Quality ControlLaboratory Research |  | 
          
            | Features 
 | 
          
            | 
                
                  Benefits
                    | 
                        Data
                            logging ability allows user to log 500
                            samples.Simple cleaning
                              mechanism
                              for easy maintenance.RS232C port
                              available as
                              standard.Back-lit display. |  
 | 
          
            | 
                
                  
                    | 
                        While
conventional
                              dust meters "count" particulates, the
                              Piezobalance dust
                              meter "weighs" mass concentration of
                              particulates.Data
                              can be
                              reviewed on-screen, printed or downloaded
                              to a computer. Software
included
                              for easy data download and processing.Easy
operation
                              requires no special training. |  | 
          
            | 
 | 
                      
          
            | Specifications 
 | 
          
            | 
                
                  
                    | Model 
 | 3521 
 | 3522 
 |  
                    | Measuring
                            Object 
 | Airborn
                            Particle Matter < 10 µm | Airborn Particle Matter <
                            2.5 µm |  
                    | Impactor 
 | 10
                          µm, 4 µm | 2.5 µm |  
                    | Measuring
                            Range 
 |  0.01 to 10 mg/m3 |  
                    | Sampling
Flow
                            Rate 
 | 1L/min 
 |  
                    | Accuracy | +/-
                            10% of reading +/- 1
                            digit (0 to 5 mg/m3) +/-
                            20% of reading +/- 1
                            digit (5 to 10 mg/m3)
 
 |  
                    | Data
                            Logging 
 | 500
                              data and time stamped measurements |  
                    | Digital
                            Output 
 |  RS-232C |  
                    | Power Supply 
 | AC or Ni-MH
                            battery 
 |  
                    | Dimensions | H7.0” x
                              D5.9” x
                              W2.7” (180 x 150 x 65mm) |  
                    | Weight (including batteries)
 | 4.4
                              lbs. (2 kg) |  |