Abstract: A pressure sprayer includes an accumulator vessel adapted to hold a pressurized fluid therein and a container that is configured to hold a chemical concentrate. A motor in fluid communication with the accumulator vessel and the container is adapted to be driven by the pressurized fluid and to pump the pressurized fluid and the chemical concentrate. A chamber is adapted to receive the chemical concentrate and the pressurized fluid from the motor to form a chemical solution. A nozzle is in fluid communication with the chamber.

Abstract: The present invention provides an animal test chamber that has one or more side walls, a ceiling, and a floor to define an internal space in which animals can be housed and exposed to a chemical agent, a door, a port for introducing animals, an exhaust port, and one or more of the following four features. The first feature is a projector for projecting an image onto the chamber floor to assist in the counting of the knocked-down animals. The second feature is the capability of automatically washing/cleaning the chamber after a test. The third feature is the capability of simulating real life insecticide application conditions. The fourth feature is the capability of automatically dispensing the contents of an aerosol can into the chamber.