Spectrex - Model PAS-500 -Micro Air Sampler

Battery, pump, electronics and detector tube all in one compact, rugged module, eliminates cumbersome Tygon tubing and charcoal tube holder clipped to lapel. Light (4 oz.) and compact, with flame retardant case. Special clip ensures unit stays firmly in pocket. Flow range: 50-350 ml/min. (5-350 ml/min. with optional, $40, low flow orifice). Full flow regulation. A constant voltage is applied to pump as battery voltage drops. Low power consumption. A low cost (< $2.00) alkaline battery is sufficient for a 40-hour work week. Easily replaceable 9-volt battery. NiCad, zinc-carbon and alkaline types are interchangeable. Adaptable - accepts 6mm diameter (single and double) and 8mm diameter charcoal tubes, other absorber tubes and Draeger & Kitigawa colorimetric tubes. Intrinsically safe. Current-limiting resistor in battery circuit prevents danger of short-circuit spark.