There are a range of options for reading out the data from vibrating wire sensors.
GK-403 Readout Box
The Model GK-403 is designed for use with all of Geokon's vibrating wire sensors. It comes with a battery charger, patchcord, RS-232 interface cable, communications software and manual. Storage of the readings is a simple one-button operation and each stored reading is identified by a reference number, ranging from 1 to 256, plus time, date and temperature. All readings can be transmitted to a host computer and imported into spreadsheet and database applications.
GK-404 Readout Box
The Model GK-404 Vibrating Wire Readout Box is a portable, low-power, hand-held unit that is capable of running for more than 20 hours continuously on two AA batteries. It is designed for the readout of all Geokon vibrating wire gages and transducers, and is capable of displaying the reading in either digits, frequency (Hz), period (µs), or microstrain (µε) . The GK-404 also displays the temperature of the transducer (embedded thermistor) with a resolution of 0.1°C.
LC-2 Single Channgel Datalogger
The Model 8002 datalogger is designed to read both the vibrating wire element and the integral thermistor of any Geokon vibrating wire sensor. The datalogger is housed inside a Fiberglass Nema 4X enclosure, and is very robust, weather-proof and particularly well-suited to operation in harsh environments. Power is supplied by two ‘D' cells or by solar panel. 16,000 arrays can be stored (8,000 arrays when used with LogWare) before the oldest data is over-written. Strings of LC-2 dataloggers can be daisy chained using the RS-485 interface, and versions are available with radios and modems to provide remote readout capabilities.
LC-2x4 Four Channel Datalogger
The LC-2×4 is a self-contained, multi-channel version of the LC-2. The LC-2×4 provides 4 channels of vibrating wire (with thermistor) and is powered by two ‘D' cells or by solar panel. The datalogger is housed inside a Fiberglass Nema 4X enclosure, and is thus very robust, weather-proof and particularly suited to operation in harsh environments. Data memory consists of 320K bytes of EEPROM, which translates into a memory storage capacity of 10,666 arrays.
Campbell Scientific Dataloggers
For large numbers of transducers or other non-vibrating wire sensors, we recommend using either the Campbell Scientific's CR800or CR1000datalogger along with the AVW200vibrating wire interface. This will provide maximum flexibility and extremely high level of signal processing ability.
