... channels (0.3, 0.5, 0.7, 1.0, 3.0, 5.0, 7.0, 10µm) l 9-digit LED display (7 ... digitals for data display) l Count data ... count for each particle-size channel l Temperature and humidity display (optional) l RS-232 communication interface l Date ... and clock display l 95%UCL calculation l Built-in printerl Multiple ...