Description
Siemens 544-643A Pass Key Tool is a Diagnostic and Maintenance Tool for Siemens room sensors for HVAC systems. This 8″ tool is for testing and calibrating Siemens’ large range of room sensor models. With operating temperatures of -40°F to 240°F, the 544-643A is built to withstand any work setting. The Pass Key Tool is easy to use, and offers exact adjustments and quick access during service operations. It works by allowing HVAC operators to transmit to room sensors to confirm readouts accuracy and adjust the HVAC as needed. This tool is essential to keep Siemens’ room sensors reliable, and in turn, helps to keep HVAC installations effective and lasting.
