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Casella/CEL MICRODUST pro Portable Real Time Monitoring Kit

Microdust Pro

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 Microdust Pro Screen Close up View
MICRODUST pro
The MICRODUST pro from Casella is a portable, real time monitor for assessing the concentration of suspended particulate matter.  It is probably the most versatile instrument available with the ability to measure from 1ugm-3 to 2500 mgm-3.  It is the only hand-held real-time dust monitor on the market capable of graphically presenting variations in dust concentration on a real time scrolling graph - no longer is it necessary to wait to analyze results on a PC. 

Features
An incredible measurement capability from 1ugm-3 to 2500mgm-3.
Comprehensive data-logger providing over 15,700 data points
Detachable probe for identification of problem areas
Options for TSP, PM10, PM2.5 or ISO Repairable measurement
Instrument software calibration and zero routines
4 user defined calibration routines available for differing dust types 
Option of alkaline or rechargeable batteries32bit WinDust pro PC software
 
Applications
Occupational health and safety monitoring
Walk through surveys
Site boundary monitoring and environmental measurement
Industrial process monitoring
Testing respiratory equipment or air filtration efficiency
Research activities

Operation
The MICRODUST pro measures particulate concentrations using a near forward angle light scattering technique. Infrared light of 880nm wavelength is projected through the sensing volume where contact with particles causes the light to scatter.  The amount of scatter is proportional to the mass concentration and is measured by the photo detector.  By using a narrow angle of scatter (12-20o) the majority of scattered light is in the diffracted and refracted components, which minimizes the uncertainty associated with particle color, shape and refraction index.
 

Concentration Range
The MICRODUST pro has the advantage that there is only one model which covers the entire measurement range (0-2500mgm-3).  It is possible to "fix" the range of the instrument, or have it as an "auto-ranging" device.
 

Calibration
Each MICRODUST pro is individually factory calibrated, using a gravimetric technique. This instrument can be returned to its "factory" calibration setting at any time during its life by the use of a non-degradable calibration insert. An individual gravimetric calibration is also possible.
 

Specifications
 
Operation
Sensing Technique: Near forward light scattering - 880nm infrared
Ranges: All instruments provide 0 to 2500mgm-3 over four ranges as standard: 0-2.5, 0-25, 0-250, 0-2500mgm-3 
Active range may be fixed or auto-ranging
Resolution: 0.001 mgm-3  (1ugm-3) 
Operating Temp Range: 0 to 50oC (non condensing)
Storage Temp Range: -20 oC to +55 oC
Zero Stability: +/-0.002mgm-3/ oC
Span Stability: <0.7% FSD / oC
Power
Battery: 4 x AA / MN1500 cells - Alkaline or rechargeable NiCd
Operating Duration: Alkaline (2700mAh) typically >20 hours
NiCd cells (950mAh) typically >9 hours
Battery Charging: Internal NiCd fast charger circuitry
N.B. Charger may be disabled for dry cell operation
Power Adapter Universal input voltage range 100-240Vac, 47-63Hz
General
Analogue Output:  0 to 2.5 VDC FSD, 500ohms output impedance
Keypad: 7 key tactile membrane
Weight: Instrument only=0.97Kg (complete kit in carry case 4.5Kg)
Dimensions: Probe= 35mm 0 x 290mm total length
Instrument HxWxD=245 x 95 x 50 mm
Carry Case HxWxD=135 x 490 x 370 mm
Display
Display:  128 x 64 pixel LCD graphics panel with backlight
Display Values
Instantaneous reading: Rolling average concentration over a user selectable period (1 to 60 seconds)
Time Weighted Average:  Average concentration since power on or reset
Maximum value:  Maximum concentration since power on or reset
Scrolling Graphs: Real time graphs of dust concentration
Selectable time-base periods of 100/200 seconds, 15 minutes or 60 minutes
Y Axis may be auto-ranging or fixed
Battery voltage:  Battery Voltage with status icon
Calibration
Factory Calibration:  Traceable isokinetic technique (wind tunnel) and ISO 12103-1, A2 fine test dust
Dust box calibration for high concentrations
User Calibration:  Four user defined calibration settings available
Routine Calibration:  Software calibration for zero and span setting
Optical calibration filter supplied (restores factory calibration)
Data Logging
Internal Memory:  64k EEPROM providing 15,700 data points
Logging Interval:  Adjustable from 1 to 600 seconds
Recorded Values:  Individual, average and max/min concentrations over logging period
Serial Interface:  RS232 up to 38.4k baud
IrDa (Future expansion/ optional extra)
Software Windust pro provides a friendly graphical interface for instrument configuration, data download and graphical report presentation.
Operating System:  Microsoft Windows 95, 98 or NT
Requirements:  IBM compatible Pc with RS232 serial port, 8Mb RAM, FDD, HDD, VGA color graphics
 

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