1. Introduction
The CRS451/CRS456 is a water-level and water-temperature sensor with a clock and memory to
store the data, in a compact stainless-steel case. This frees users to place the sensor in remote
sites and let it store data for long periods of time. The CRS451/CRS456 supports standard time-
based scanning and recording along with event-based recording based on water level change
(Delta) or logarithmic time sequence for pump and slug tests. HydroSci software, available at
www.campbellsci.com/downloads/hydrosci
, supports test set up, data retrieval, and data display.
The CRS451 has a 316L stainless-steel case that can be submerged in most canals, wells, ponds,
lakes, and streams. The CRS456 has a rugged titanium case that allows it to be used in saltwater
or other harsh environments.
2. Precautions
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Although the CRS451/CRS456 is a rugged and reliable device, it is also a highly precise
scientific instrument and should be handled as such.
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The CRS451/CRS456 will be damaged if encased in frozen liquid (see
(p. 6) for more information).
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Dropping the instrument or allowing it to “free fall” down a well may damage the
transducer.
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Confirm the compatibility of the instrument to non-water environments before installation.
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The CRS456 should be used in harsh water applications, including salt water.
3. Initial inspection
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Upon receipt of the CRS451/CRS456, inspect the packaging for any signs of shipping
damage. File damage claims with the shipping company.
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Immediately check package contents against the shipping documentation (see
(p. 2). Contact Campbell Scientific with any discrepancies.
CRS451/CRS456 Submersible Water-Level Recording Sensor
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