indoor air quality and personal aerosol monitoring devices with data acquisition system indoor air quality and personal aerosol monitoring devices with data acquisition system , indoor air quality and personal aerosol monitoring devices with data acquisition system , indoor air quality and personal aerosol monitoring devices with data acquisition system·         time constant ( oled display ) - user-adjustable, from 1 to 60 seconds ·         sensitivity- sensor type is 90° light scattering, 650 nm laser diode and calibrated against a gravimetric reference using the respirable fraction of standard iso 12103-1, a1 test dust ·         aerosol concentration range: 0.001 to 100 mg / m3, particle size range: 0.1 to 10 μm, minimum resolution: 0.001 mg / m3, zero stability: ±0.001 mg / m3 over 24 hours using 10 second time constant·         flow rate range: user-adjustable, 0 to 1.8 litres / min ·         attachable cyclones: 4 μm dorr-oliver ( 50% cut-off at 4.0 μm ) , 0.8 μm dpm ( 50% cut-off at 0.8 μm ) ·         alarm types: general, stel ( 0.5 mg / m3, 1 mg / m3, 3 mg / m3, 5 mg / m3, 15 mg / m3, off programmable from 0.001 to 999 mg / m3 through software. ( please refer nit document for complete specifications )