WATER SAMPLER Designed for field use, the reversible flow Peristaltic Pump from Solinst is ideal for vapor sampling or water sampling from shallow wells and surface water. It can be used for vacuum pumping and for pressure delivery of liquids or gases. Compact and lightweight, the Peristaltic Pump has no vents, grates or openings. This makes it water resistant, easy to use in the field and easy to maintain and repair. The metal case is extremely robust and water resistant. A handle and one easyaccess control on the top of the pump make it perfect for fieldwork. The pump measures 13” x 5” x 6-1/ 2” ( 33 cm x 13 cm x 17 cm) and weighs only 8 lbs ( 3.6 Kg) . The mechanical peristaltic operation uses rotating rollers to depress the silicon tubing, creating a vacuum, which displaces any fluid or gas in the chosen direction. It is effective to depths up to the suction lift limit, which varies with elevation, and can be as much as 33 ft or 10 m at sea level. Features:  Easy carry handle Variable pumping rates Controlled through single top-mounted knob Peristaltic Pump can be powered from a vehicle battery Fit with two sizes of silicon pump-head tubing Alligator clips for powering from most 12 volt DC sources Reversible motor with easily replaceable fuse Reverse polarity protection Power A 12 ft. ( 4 m) power cord uses alligator clips to allow easy connection to almost any 12 volt DC power source that can supply at least 3-5 amps at maximum draw ( such as auto, marine or small gel cell battery) . The pump may be connected directly to your vehicle battery. The variable speed motor is reversible, has an easily replaced fuse and has reverse polarity protection to prevent damage to the pump. Includes:  32 of 5/ 83 O.D. silicon tubing