Automatic depth sensing detection for portable soil moisture probes

摘要

A depth sensing arrangement (10) useable for detecting the depth of insertion of a probe (16) into a probe receptacle (17). The probe having at least one data sensor (20) arranged along its length. The probe has a plurality of detectors (30) located along its length at predetermined spacings. There is at least one trigger element (23) located at a reference position which triggers a reaction of the detector.