The accuracy attainable with the Chattock tilting manometer
W. F. Cope, R.D. Houghton · Journal of Scientific Instruments · 1936
An investigation has been made to determine the magnitude and nature of the various corrections which must be applied to the reading of a Chattock gauge when it is used for high precision work. A number of Chattock gauges were connected in parallel and their readings compared when various pressure differences were applied. The results show that while the uncorrected reading is accurate to rather better than ± 1 per cent., this accuracy can be increased tenfold by applying the corrections. On a 13-in. Chattock gauge filled with water, the higher accuracy is represented by about one division of the wheel: this corresponds to a pressure of 0.00065 in. of water. The sensitivity is a quantity of the same order of magnitude.