New Testo Digital Manifolds Comparison Guide

May 05, 2021

  Testo 550s Testo 557s Testo 550i
Valve block 2-way 4-way 2-way
All application-specific measurement values
at a glance thanks to the large graphic
display
Yes Yes No
Operation and documentation with
testo Smart App
Yes Yes Yes
Bluetooth for connection with wireless
probes and smartphone
Bluetooth 5.0
(range up to 150 m)
Bluetooth 5.0
(range up to 150 m)
Bluetooth 5.0
(range up to 150 m)
Compatible with all wireless probes
for temperature, vacuum, humidity
Yes
(with automatic
connection)
Yes
(with automatic
connection)
Yes
(with automatic
connection)
Compact outer dimensions
and one-hand operation
Yes Yes Yes
Protection class IP54 IP54 IP54
Identical pressure measuring range HP/LP up to 60 bar up to 60 bar up to 60 bar
Pressure measurement accuracy > 0.5 % of f.s.v. > 0.5 % of f.s.v. > 0.5 % of f.s.v.
Integrated temperature measurement Yes
(up to 2 temperature
probes + Bluetooth
probe)
Yes
(up to 2 temperature
probes + Bluetooth
probe)
Yes
(up to 2 temperature
probes + Bluetooth
probe)
Target superheat in the manifold
or testo Smart App
Yes Yes Yes
(testo Smart App only)
Measurement data documented
and sent via testo Smart Probes App
Yes Yes Yes
Number of stored refrigerants 90 90 90
Refrigerant update automatically via
testo Smart App
automatically via
testo Smart App
automatically via
testo Smart App
Temperature-compensated tightness testing
with temperature probe
Yes Yes Yes
Vacuum measurement
with vacuum probe testo 552i
Yes Yes Yes
Suitable for A2L refrigerants Yes Yes Yes
PC software testo DataControl (optional) Yes Yes Yes