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Handheld Readout (VW) | Model GK-404

  • Model GK-404 Vibrating Wire Readout closeup.
  • Model GK-404 Vibrating Wire Readout.
  • The Model GK-404 Vibrating Wire Readout is easily held and operated with one hand.
  • Model GK-404 with flying leads attached.
  • Model GK-404-B with banana jack connections.
Model GK-404

The Model GK-404 Vibrating Wire Readout is a portable, low-power, handheld 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 gauges 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.


Excitation Range
400 Hz to 6000 Hz, 5 Volt Square Wave
0.1 digit, 0.1 Hz, 0.1 μs , 1 µε, 0.1°C
Timebase Accuracy
±50 ppm
Temperature Range
−20°C to +50°C
L × W × H
120 × 65 × 22 mm

Please Note: GEOKON maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.