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A chart recorder which is part of a polygraph A circular chart recorder. A chart recorder is an electromechanical device that records an electrical or mechanical input trend onto a piece of paper (the chart). Chart recorders may record several inputs using different color pens and may record onto strip charts or circular charts.
A very stable, long lived, very high resolution pressure sensor is a critical enabling technology for DART's bottom pressure recorder. [11] It is a resonant quartz crystal strain gauge with a bourdon tube force collector. When compensated for temperature, this sensor has a pressure resolution of approximately 1mm of water when measuring ...
The unit is composed of a probe; a wire link; and a shipboard canister. Inside of the probe is a thermistor which is connected electronically to a chart recorder. The probe falls freely at 20 feet per second and that determines its depth and provides a temperature-depth trace on the recorder.
1915 — J.C. Stevens — Chart recorder (first chart recorder for environmental monitoring) 1924 — Irving Langmuir — Langmuir probe (to measure plasma parameters) 1930 — Samuel Ruben invented the thermistor
Weather stations typically have these following instruments: . Thermometer for measuring air and sea surface temperature; Barometer for measuring atmospheric pressure; Hygrometer for measuring humidity
The pressure on a pressure-temperature diagram (such as the water phase diagram shown above) is the partial pressure of the substance in question. A phase diagram in physical chemistry , engineering , mineralogy , and materials science is a type of chart used to show conditions (pressure, temperature, etc.) at which thermodynamically distinct ...
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The sea temperature at the water sampling depth is recorded by means of a reversing thermometer fixed to the Nansen bottle. This is a mercury thermometer with a constriction in its capillary tube which, when the thermometer is inverted, causes the thread to break and trap the mercury, fixing the temperature reading. [ 1 ]
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