USE OF PYROELECTRIC DEVICES FOR MEASURING SMALL TEMPERATURE CHANGES
Sidney B. Lang · eScholarship (California Digital Library) · 1960
A techq~que for measuring extremely small temperature changes by means of a pyroelectric device is described.The sensing element is a short, thin rod of po~arized barium titanate ceramic with electrodes on the ends.The electric charges produced qy changes in temperature are measured by a vibrating-reed electrometer.The device is sensitive to temperature changes as small as 2 x 10-7 °Cj and modifications can be made to achieve crnuch greater sensitivity.The device is extremely free of ordinary thermometric errors.A number of calorimetric and noncalorimetric applications for the device are suggested,