Dispenser comprising a replaceable liquid container

A dispenser system comprising:

• a dispenser and a replaceable liquid container;
• and
• a dispensing mechanism causing fluid to be discharged from the liquid container upon actuation and comprising a pump unit for discharging said liquid and a manual actuating device arranged for mechanically activating said pump unit upon actuation,
• wherein said dispenser further comprises a detection unit for detecting displacement of said pump unit,
• wherein information related to said displacement can be transmitted to an external computer unit,
• wherein the pump unit is configured with a displaceable element which, upon actuation, has a linear motion during discharging of liquid,
• wherein the displaceable element interacts with a rotating gear element, and
• wherein the gear element is associated with a magnetometer sensor.