Concept
Rockland Scientific SPM-38 velocity shear probe
| URI | http://vocab.nerc.ac.uk/collection/L22/current/TOOL0642/ | ||
|---|---|---|---|
| Within Vocab | SeaVoX Device Catalogue | ||
| Alternative Labels | Rockland SPM-38 | ||
| Definition | A velocity shear probe measuring microstructure velocity fluctuations in oceans and lakes. The instrument measures a single spatial component of turbulent velocity fluctuations, in a direction perpendicular to the probes main axis. The sensing head is based upon the design by Osborn (1974) and the sensing element consists of a parabolic, flexible rubber tip. The oncoming flow produces a hydrodynamic lift force proportional to the fluctuating cross-stream velocity component u. A piezo-ceramic beam embedded in the rubber tip translates the lift force into an electric signal that is proportional to u. The length of the sensing tip (10 mm) determines the maximum wavenumber resolution of the sensor which is approximately 48 cycles per meter. The measurements can be corrected to include wavenumbers up to 150 cpm. The sensor operates over the range 0 to 10 s^-1, has a sensitivity of 0.04 to 0.09 V m s^-2 and resolution of approximately 10 to 4 s. | ||
| Date | 2018-04-23T16:44:12 | ||
| Identifier | SDN:L22::TOOL0642 | ||
| Note | accepted | ||
| Has Current Version | 2 | ||
| Version | 1 | ||
| version | 2 | ||
| inScheme | http://vocab.nerc.ac.uk/scheme/SDNDEV/current/ | ||
| Broader | L05:384 |
ADVs and turbulence probes | Mapping: 484846 |
L19:SDNKG17 |
sensor_model | Mapping: 1696510 | |
| Related | B75:ORG00677 |
Rockland Scientific International | Mapping: 1448598 |
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