Post on 30-Apr-2020
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Micro-SquidHigh-resolution Eddy Correlation Sensing System
Descrip(on:The Micro-‐Squid is a reliable and stable instrument for the measurement of scalar microstructure. The instrument supports micro probes for temperature, conduc:vity, oxygen, or fluorescence. The sensing elements are connected to the main housing via flexible connec:ons, so that the sensors can be posi-‐:oned in specific loca:ons.
The micro-‐Squid is ideal for use with Acous:c Doppler Velocimeters (e.g., Nortek’s Vector) to facilitate eddy correla:on measurements of scalar fluxes. With the eddy correla:on method, fluxes are determined from the simultaneous measurements of velocity and the scalar.
Environmental signals generally have a “red” spectrum. The signal variance decreases with increasing frequency, which leads to a loss of high-‐frequency signal content during the sampling process by the A/D converters. To maximize the signal resolu:on the Micro-‐Squid's electronics emphasizes high frequencies. The signal output increases in propor:on to frequency beginning at 0.16 Hz and ending at 12 Hz. The emphasis is later reversed dur-‐ing the signal processing. This technique is similar to Dolby noise reduc:on systems, resul:ng in improved bandwidth and resolu:on of the scalar signal.
Features:• Pressure case rated to 100 m (op:onal to 1000 m);• Support for:
-‐ Micro Temperature,-‐ Micro Conduc:vity,-‐ Micro Oxygen,-‐ Micro-‐fluorometer;
• High bandwidth analog signal condi:oning with signal pre-‐emphasis;• Supply voltage 9 – 15 VDC;• Signal output 0 – 5 V.
Data Example