Description
For evaluating fly sprays based on the technique described in
Soap and Sanitary Chemicals (Feb 1943) Vol 19; p101-104,
128, with certain modifications.
Each chamber door has 3 atomiser spray ports. A suitable atomiser
position will be determined during test spraying once the chamber has
been set up and calibrated to deliver 1ml in 4.5 +/- 0.2sec with an air
pressure of 12.5psi (pounds per square inch). Each sprayer has been
factory calibrated and should not need attention.
The atomisers are connected to the common air supply using the
silicon rubber tubing and 'T' connector.
The glass cylinder is 12 inches (approx. 25cms) in diameter and
24inches (approx. 50cms) in length with aluminium end plates hinged
to open. The atomisers are made of brass with adjustable liquid and
air jets. These are easier to calibrate and clean than glass atomisers
and are less liable to breakage.
The atomiser spray head can be easily disassembled for cleaning but
care should be taken when removing particles from the jet plate. Do
not clear obstructions from the jet using wire or any implement that
could distort or change the size of the hole. Each jet plate is located
by 2 screws and positioned with dowel pins to ensure correct
relocation. Obstructions can be removed by immersing the atomiser in
a solvent and removing the chemical pick-up tube and air inlet tube.
By removing the small screw at the coned end and the jet plate all
passages can be cleared with compressed air. The atomizers are
controlled by a solenoid valve and programmable timer unit.
Selectable spray periods give reproducible effects once the chamber
has been set up and calibrated.
Insects for test are transferred into the sample net which is assembled
to the loading position on the chamber door. Prior to spraying the
insects are released in to the chamber via the rise and fall aperture.
Satisfactory operation of the Knockdown Chamber requires the use of
an air compressor capable of delivering low pressures up to 15psi with
an output control valve to maintain a constant 12.5psi. Apart from an
external light source the chamber is complete and ready for immediate
use.
Standard equipment
· Double door chamber assembly including 4 spray
port plugs
· Inlet shutter
· 2 atomisers with tubing
· 4 atomiser reservoirs
· 2 insect cages with fine mesh nylon nets
Ordering Information
Product Code Description
BS00280 Kearns & March Knock-down Chamber
BS00616 Compressor
The company reserves the right to make changes to the specification without
notice.