Monitoring methods and some instruments available are summarized for general reference in the following tables:

● Table 3.1 — method or instrument vs. condition to be monitored ● Table 3.2 — applications of simple vs. complex instruments ● Table 3.3 — methods or instrument summarized on basis of category of application

Comprehensive references on instrumentation have been prepared by Cording et al. (1975) and Dunicliff (1988). Catalogs available from Boart Longyear Interfels GmbH, Geokon, Soil Instrumentation Ltd., and Slope Indicator Co. are very informative.