Light source

Diode pumped solid state laser (wavelength 1 064 nm),open-cavity type

　Laser diode

Wavelength 800 nm, rated output power 1 W

　Laser medium

Nd: YVO4

Laser product class

Class 1, IEC 60825-1

Light detector

Photodiode

Air flow method

Purified sheath air envelops sample air coaxially

Flow rate

2.83 L/min

Calibration

With polystyrene latex (PSL) particles (refractive index 1.6)　in clean air

Minimum particle size

0.1 μm (with PSL particles of refractive index 1.6)

Size range (5 channels)

≥0.1 μm, ≥0.15μm, ≥0.2 μm, ≥0.3 μm, ≥0.5 μm

Maximum particle　number concentration

10 000 particles/L (coincidence loss 5 %)

False countrate

One count or less per 5 minutes

Measurement modes

Manual measurement　mode

After being started, measurement continues until a stop　commａnd given　

Automatic measurement

mode

After being started, measurement continues for the　preset measurement time

Measurement time

HOLD

After completion, measurement is automatically

repeated after pause intervals of about 10 seconds