Description Product Description For completely wireless measurements on refrigeration and air conditioning systems and heat pumps. Thanks to the Bluetooth vacuum probe supplied, you can even measure vacuum without any cables or hoses. You will get the testo 557s smart digital manifold with Bluetooth and 4-way valve block, one testo 552i wireless vacuum probe (Bluetooth), two testo 115i wireless clamp thermometers (Bluetooth, NTC), a hose filling set with 4 hoses and a robust transport case. For other wireless measurements, the Testo Smart Probes are ideal. Delivery Scope - testo 557s digital 4-way manifold including batteries (4 x AA) and calibration protocol - 1 x testo 552i wireless Bluetooth vacuum probe - 2 x testo 115i wireless Bluetooth clamp thermometers - Hose filling set with 4 hoses - Transport case - testo Smart App (free download) - Instruction manuals Specification testo 557s - Smart digital manifold with Bluetooth and 4-way valve block Order-Nr. 0564 5570 Applications Refrigeration systems, air conditioning systems, heat pumps - Determination of high and low pressure, automatic determination of condensation and evaporation temperature and calculation of superheating/subcooling. All results can be read simultaneously on one screen - Tightness test: Recording and analysis of the pressure curve - Automatic calculation of the target superheat (in conjunction with the appropriate measuring instrument, e.g. Testo Smart Probe) - Measure vacuum: Graphic progression display of the measurement with indication of the start and differential value - Evacuation: Graphic progression display of the measurement with indication of the start and differential value (in conjunction with the appropriate Testo Smart Probe, e.g. testo 552i vacuum probe)