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Type: Normal Models: 228A, 228B, 229A, 229B Micron sensitity, sample rate, and particle display amount dependent on model

Model 228 Particle Counter

The simplest, one switch, one display and quick results particle counters and now available. The Model 228 takes a six second sample, then calculates and displays the concentration in particles per cubic foot. The 229 displays the number of particles in 0.1 cubic feet of air after a one-minute sample. Both units detect discrete particles using a laser based sensor.

Model Numbers 228A, 228B, 229A, 229B
228A Options: 0.5 micron and .1 CFM. Six second sample. Displays particles per cubic foot.
228B Options: 0.3 micron and .1 CFM. Six second sample. Displays particles per cubic foot.
229A Options: 0.5 micron and .1 CFM. One minute sample. Displays particles in 0.1 cubic feet of air.
229B Options: 0.3 micron and .1 CFM. One minute sample. Displays particles in 0.1 cubic feet of air.