A terminal clamp for a moisture sensor to be placed on a patients skin in order to monitor a vascular access to a patient includes first, lower and second, upper legs for clamped fixing of terminal tab of moisture sensor, rear end pieces of the legs being connected. The terminal clamp includes terminal contacts for contacting electrical contact points of terminal tab, and a guide piece having a slot-shaped cutout for receiving terminal tab. Slot-shaped cutout of guide piece is bounded laterally by two stop elements so that terminal tab is held in terminal clamp in a predetermined position, in which terminal contacts of terminal clamp contact the electrical contact points of terminal tab. Upper leg comprises a latching device, which is fixed in slot-shaped cutout in a snap-in manner when terminal clamp is closed to lock upper leg in position on lower leg.
