Replacing the pump leak sensor

Replacing the pump leak sensor
Topic LCI-USG-0166, Last Updated 05/19/2025

Users or Waters field service personnel can replace the pump leak sensor.

Warning: Observe Good Laboratory Practice (GLP) at all times, particularly when working with hazardous materials. Consult the Safety Data Sheets regarding the solvents you use. Additionally, consult the safety representative for your organization regarding its protocols for handling such materials.
Warning: To avoid personal contamination with biologically hazardous or toxic compounds, wear clean, chemical-resistant, powder-free gloves when performing this procedure.
Warning: To avoid eye injury, use eye protection when performing this procedure.
Requirement: Wear clean, chemical-resistant, powder-free gloves when performing this procedure.

Required tools and materials

  • Chemical-resistant, powder-free gloves
  • Protective eyewear
  • Replacement leak sensor
  • Flat-blade screwdriver

To replace the leak sensor:

  1. Open the pump compartment door.
  2. Press down on the leak sensor connector tab and remove the connector from the receptacle. A flat-blade screwdriver can aid in pressing down the leak sensor tab to disengage the locking mechanism.
    Figure 1: Leak sensor connector
    Tab
    Leak sensor connector
  3. Grasp the leak sensor by its serrations and pull upward to remove it from the drip tray reservoir.
    Figure 2: Leak sensor serrations
    Leak sensor serrations
  4. Unpack the new leak sensor.
  5. Align the leak sensor’s T-bar with the slot in the front of the leak sensor cavity, and then slide the leak sensor into the slot.
    Figure 3: Aligning T-bar with slot
    T-bar
    Slot in front drip tray, right-hand side
  6. Connect the leak sensor connector to the receptacle on the front panel.
    Figure 4: Attaching leak sensor connector
    Leak sensor connector
    Leak sensor receptacle on front panel
  7. Close the pump compartment door.
  8. From the touchscreen Commands view, tap Reset.
  9. From the touchscreen System view, tap Leak Sensors and then enable the QSM Leak Sensor.

Need Help? Connect with a Waters expert. 


To avoid risk of personal injury and to prevent damage to laboratory equipment, always operate your Waters products in accordance with the applicable operational and safety information, your organization’s standard operating procedures, and local regulations.

Refer to the English version of this page for the latest information.

Back To Top Back To Top