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All results at a glance thanks to the large graphic display
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Exceptionally compact and reliable thanks to the easy-to-handle, robust housing with IP 54 protection class
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Simple, wireless measurement of vacuum and temperature via automatic Bluetooth®
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Even greater flexibility for your measurements and documentation with the testo Smart App
The testo 557s digital manifold with Bluetooth and a 4-way valve block features a large graphic display, a compact, robust housing, guided measurement menus and the testo Smart App. Top-quality measurement technology, a high degree of reliability and smart functions for quick, easy measurements and documentation make the testo 557s manifold a reliable partner for your commissioning, servicing and maintenance of refrigeration and air conditioning systems and heat pumps.