Dosing unit SPRAYER

The next generation of the SPRAYER adapter for particle and droplet size analysis of pump dispensing sprays has been redeveloped from the ground up. The smart, software-controlled actuator SMACTOR enables controlled and reproducible triggering profiles with a variety of individually assignable parameters (acceleration, speed, stroke length, force ...). Optionally, SMACTOR with a variable rack is also used independently of the SPRAYER in free experimental set-ups with a variety of different spray applications. Dosing unit for particle and droplet size characterisation within spray cones of MDIs, pump or propellant gas sprays The SPRAYER is a versatile adapter of pump sprays or propellant gas sprays to the laser diffraction sensor HELOS for the measurement of particle and droplet size distributions. As the results are usually depending on a variety of parameters driving the spraying process, e.g. the force or the path-velocity behaviour, the distance to the measuring zone or the gradient of the spraying device to the horizon, the spraying process has to be performed under controlled conditions. The actuating piston from SPRAYER can be controlled by software in terms of acceleration, velocity and stroke length by the electronic trajectory actuator. Alternatively the electronic force actuator can be used, if the piston has to be driven at a constant, definable force. The complete actuation process is controlled and monitored by software for subsequent evaluation. The distance of spray outlet to the measuring volume can be varied under software control.