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The Trotec PC200 Particle Counter features 6 measuring channels (0.3, 0.5, 1.0, 2.5, 5.0 and 10.0 μm) with three counting modes (concentration, cumulative and differential) and counting efficiency of 50% at 0.3 μm and 100% for particles beyond 0.45 μm. The internal pump allows flow rate of 2.83 l/min (0.1 ft³/min) and the zero count is < 1 particles / 5 min with a coincidence loss of 5%, 2 million particles per ft³ (28.3 liters). The Laser class 3B with wave length of 780 nm and 90 mW is used as a light source while isokinetic probes serve as sample inlet. The device can be used to easily acquire readings on air temperature, humidity, dew point temperature and wet-bulb temperature.