Testo External Vacuum Probe for Testo 557 Digital Manifold | 0638 1557 Refrigerant Gauges and Azeotropic

and Azeotropic

Temperature range is -20°C to 60°C — confirm suitability for your application

Yellow Jacket recommends a 9V lithium battery for low-temperature operation

AREAS OF APPLICATION FOR THE TESTO 625 HUMIDITY METER

remaining flexible in cold conditions where vinyl leads become brittle

Testo External Vacuum Probe for Testo 557 Digital Manifold | 0638 1557 Refrigerant Gauges and AzeotropicTesto External Vacuum Probe for Testo 557 Digital Manifold 0638 1557 The Testo 0638 1557 is an external vacuum probe designed for use with the Testo 557 digital manifold, providing faster and more reliable evacuation measurements than the manifold's built in vacuum sensor. By placing the probe closer to the system being evacuated rather than measuring at the manifold you get a more accurate representation of the actual vacuum level in the system,