Two series of borehole probes can be supplied, Stand Along Probes or Quick Link (QL). As the name dictates, stand-alone logging probes are designed around a particular sensor or complimentary sensors and cannot be adapted. The Quick Link series enables the operator to construct a particular sensor array to meet project requirements. Quick Link probes can be used independently or stacked to form particular tool strings. Quick Link tool have superseded the older poly-Series slimline tools.