Abstract: A dew point temperature measuring apparatus and method, which may be used to determine water activity, includes a chamber in which a sample of air is measured, an air circulation device positioned within the chamber, a sensor to measure the sample temperature, a relative humidity sensor, and a diverter for causing air circulating within the chamber to directly impinge the relative humidity sensor. Another embodiment involves mounting an air circulation device within the chamber such that it forces air inside the chamber to impinge directly upon the relative humidity sensor to reduce boundary layer resistance. Still another embodiment of the invention involves utilizing a temperature control device to control the temperature of interior surfaces within the chamber at a temperature higher than the sample of air within the chamber.

Abstract: This device consists primarily of an externally threaded mast which is adaptable to fit the mast mount of a U-shaped ground spike, a flat table, or a tri-pod. The device consists of various arms and brackets which are elevatable and may be moved forward and backward and will rotate 360.degree., the device including a vernier adjustment which will enable the camera to be moved forward and backward for fine focus.