A trigger arrangement for a scanning system can include a sealed housing configured to support a scanning device, a trigger, and an actuation device configured to control functionality of the scanning device. A first magnet can be positioned outside of the sealed housing and can be configured to be selectively moved by the trigger. A second magnet configured to be repelled by the first magnet can be positioned inside of the sealed housing. A connecting member that supports the second magnet can be configured to transfer force from the second magnet to the actuation device. Some configurations can provide tactile feedback to a user when the trigger is used.