Abstract: The present invention relates to an improved dispensing apparatus for olfactory stimulating material. Utilizing a micro-controller and software control, it is user configurable to be able to operate in a variety of operating modes. Incorporating ambient condition sensor into the apparatus allows it to operate only when certain ambient conditions are met. This gives the apparatus the flexibility to be adaptable to a wide variety of operating conditions. In particular, multiple actuations per dispensing action and operation when ambient conditions change can be configured by the user.