A sampling probe includes a housing, a cover and a guide. The housing defines a trough having an opening, at least a portion of the opening being in an insertion direction of the probe. The cover is axially movable with respect to the housing between an open position in which a substance is allowed to...http://www.google.fr/patents/US6644137?utm_source=gb-gplus-shareBrevet US6644137 - Sample probe
