Testo 557 External Vacuum Probe Temperature Also practical: since no hoses

Also practical: since no hoses are needed for the measurements

For calibration

The grand gear uses stainless steel that is resistant to wear and deformation an application of hard coating on the surface of the crystal makes the gauge highly scratch as well as chemical resistant

net to have access to the Testo Cloud

testo 831 infrared thermometer

Testo 557 External Vacuum Probe Temperature Also practical: since no hosesThis external vacuum probe for the Testo 557 is designed to provide faster and more reliable evacuation measurements from 0 to 20,000 microns. This external vacuum probe features a secure connection and is suitable for use on all refrigeration systems and heat pumps. External vacuum probe for use with the Testo 557 digital manifold (0563 1557).