TY - JOUR AU - Ltd., Photoelectronics (M.O.M.) AB - Nov itisfrirrrirtits, riicilrrials ur1d tools Self-setting surveyor's Icvcl. Hilger and Watts Ltd., 9X St. electrodes for ionic bombardment cleaning if required, The plate on which the photometer is mounted rests on top Pancras Way, Camden Road, London, N.W. I. of the nictal chamber guard and carries the photocell and The Autoset lcvcl incorporates an optical device which light source for reflexion measurcmcnt. For transmission automatically levels the line of sight. In using the level, it measurement, the light source is transferrcd to the chamber is merely necessiiry to centre a circular bubble on the tribrach base-plate. to within 20'; the automatic stabilizer then levels the line of The pumping system consists of a 4 in. oil diffusion pump collimation for every sighting. The stabilizer unit, inserted having a baffled speed of approximately 200 I./s. This is between the objective and eyepiece, consists of a fixed roof backed by a single-stagc rotary pump with a displacement of prism between two suspended prisms. The latter are sup- 5 ft3/min. The pumping System iS ComplCtC with suitable ported by four metallic tapes forming a cross-spring flcxure pipework and tnanui\lly-oper~ited valves for backing and pivot. The pendulous double prism changes its angular bypnss. TI - Daylight integrating meter JF - Journal of Scientific Instruments DO - 10.1088/0950-7671/36/9/422 DA - 1959-09-01 UR - https://www.deepdyve.com/lp/iop-publishing/daylight-integrating-meter-AnuKnW4xqY SP - 414 VL - 36 IS - 9 DP - DeepDyve ER -