Magnetostrictive Probe (Model 924B)
Figure 3-1 924B Probe
1.4 About the 924B Probe
The 924B probe uses magnetostrictive principles to derive product and water levels, and product temperatures.
These probes are primarily used in under-ground storage tanks for both inventory and leak detection.
Two floats can be fitted to the probe shaft: The upper (product) float sits on top of the product, and the lower
(water float) sits on the product/water boundary at the bottom of the tank.
Five temperature sensors reside in the probe shaft for measuring product temperature. They are located at
positions of approximately 10%, 20%, 40%, 60% and 80% of the tank volume (based upon a cylindrical tank).
The sensors compensate for the expansion and contraction of the product with temperature and thus producing
net corrected product volume.