1. Introduction
The CRVW3 is a data logger that measures and stores readings from up to three vibrating-wire
sensors. A temperature measurement, usually obtained from a thermistor built into the sensor, is
also available for each of these three channels. Separately purchased, single-coil-circuit
vibrating-wire sensors are also supported. Common vibrating-wire measurements include water
depth (pressure or column height), strain of structural members, loading, crack/gap extension,
earth pressure, and tilt.
The use of patented VSPECT® technology helps to eliminate unwanted noise interference and
results in high-resolution output. Learn about the patented Campbell Scientific VSPECT spectral-
analysis technology at:
Measurements may be taken as often as once every one to three seconds (one second per active
channel) and as infrequently as once per day. Measurement history is preserved on the device,
which enables data collection at anticipated intervals and protects against data loss during
periods of intermittent radio connectivity.
Figure 1-1. CRVW3–RF451/RF452
CRVW3 3-Channel Vibrating-Wire Data Logger
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