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1. A probe head for a leak detector comprising one or more probe head ports and a clamp arranged for shifting between an open position for receiving a pipe section and a closed position for enclosing the pipe section and forming a chamber around the pipe section in the closed position, wherein at least one of said probe head ports opens into the inside of the chamber, wherein the probe head comprises an activator for shifting the clamp from the open position to the closed position by interaction with the pipe section, and wherein the activation means comprises one or more activation points configured for mechanical activation of the clamp by an applied force applied to at least one of the activation points, wherein the clamp is configured to gradually close when a force is applied to the one or more activation points such that a size of an opening in the clamp is adjusted depending on the force applied to said one or more activation points, wherein the clamp is made of an elastic material, wherein the clamp comprises an inner part, an outer part having a lower jaw and an upper jaw, and two connection points connecting the upper jaw with the lower jaw, the clamp comprises a transversal opening between the connection points arranged to receive the pipe section, and wherein at least one of the connection points is configured as an activation point configured to be mechanically activated by the applied force, directed towards the inner part to shift the clamp from the open position to the closed position by means of deformation of the clamp.
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