The testo 557 digital manifold fulfils numerous functions, which are required for working on refrigeration systems and heat pumps, in just one instrument: for example superheating/subcooling calculation, vacuum measurement, temperature-compensated leakage test.
Testo 557 Specifications:
Temperature range:-50 to +150 °C
Pressure Measuring range:-1 to 60 bar
Vacuum Measuring range:0 to 20000 micron
Calculation of superheating and subcooling in real time: no manual calculation
Connect to smartphone/tablet app
Precise external Pirani gauge for vacuum measurement
temperature-compensated leakage test
automatic ambient pressure measurement
The 60 most common refrigerants are stored in the instrument
subsequent updates possible (via app)
