DEVICE EXAMINING WATER IN HOLES Russian patent published in 2000 - IPC

FIELD: remote measurement of parameters of aqueous medium. SUBSTANCE: device is intended for remote measurement of such parameters as temperature, hydrostatic pressure, conductivity, hydrogen value pH, oxidation-reduction potential Eh, content of dissolved oxygen and concentration of various ions of aqueous medium in holes. Device has submersible sonde and ground unit connected by logging cable Ground unit includes noise suppression subunit and submersible sonde is supplemented with screening hood housing transducers. Windows in screening hood for flow of water are located outside of zone where sensitive elements of potentiometric transmitters are positioned. Design of screening hood provides for suppression of both lateral and longitudinal components of external electric field and noise suppression subunit conducts digital filtration and correlation analysis of measurement signals of all measurement channels. Usage of two potentiometric transmitters of various length of same type contributes to detection and evaluation of intensity of external electric field. EFFECT: increased noise immunity. 1 cl, 1 dwg