The Warrick-Gems Sensors & Controls 3E2A 2-Probes Holder is a level sensing accessory designed to securely position conductivity probes in compatible HVAC and boiler systems. It works by holding two probes at the correct depth to accurately detect liquid levels, allowing the control system to monitor water levels and regulate equipment operation. Commonly used in boilers, cooling towe... https://www.partshnc.com/3e2a-warrick-gems-sensors-controls-holder-2-probes