Testo was founded in Lenzkirch, in the Black Forest region of Germany, in 1957 and has since designed, developed, and manufactured portable test and measurement instrumentation and solutions. Backed by 60 years of measuring engineering experience, testo's mission is to provide the highest quality, service, and value in the industry.
Testo's first product manufactured was a simple electronic thermometer. Today, the product line has expanded to include a large variety of temperature measuring instruments, such as data loggers, air velocity meters, humidity and dew point meters, refrigeration service analyzers, multifunction instruments, stack gas analyzers and air emission monitors, water analyzers, tachometers, sound, pressure, and light meters, and thermal imagers.
With the testo 550s you have the choice - get all measurements at one glance thanks to the back-lit display or take advantage of the automatic Bluetooth connection to remotely carry out and view all measurements. The Digital Manifold determines high and low side pressures, as well as evaporation and condensation temperature.
Control your instrument remotely and navigate through all measurement data via Smartphone or Tablet. Quickly and conveniently document your job, finalize your report and send it out via email - directly from the job site.
The testo 550s is equipped with a particularly rugged housing (protection class IP54), a suspension hook, and a 2-way valve block with three connections. This enables convenient servicing and maintenance of air conditioning and refrigeration systems, as well as heat pumps.
Thanks to the large, graphic display and Bluetooth connection, HVAC/R technicians can control and view all measurements on the digital manifold or remotely via App. A simplified menu structure and guided measurements make the testo 550s a reliable partner.
Your testo 550s basic set includes the digital manifold, two wired temperature clamp probes, and a protective case. Optional probes for wireless measurements of vacuum and temperature are available separately or in extended Kits.
testo 500s | testo 557s | testo 550i | |
---|---|---|---|
Wireless operation and documentation | ✓ | ✓ | ✓ |
Valve block | 2-way | 4-way | 2-way |
Protection class | IP54 | IP54 | IP54 |
Back-lit Display | ✓ | ✓ | ✘ |
Compatible with wireless probes for temperature, vacuum, humidity | ✓ | ✓ | ✓ |
Integrated temperature measurement | up to 2 temperature probes + Bluetooth probe | up to 2 temperature probes + Bluetooth probe | up to 2 temperature probes + Bluetooth probe |
Refrigerants stored | 90 | 90 | 90 |
Refrigerant update | automatically via App | automatically via App | automatically via App |
Suitable for A2L refrigerants | ✓ | ✓ | ✓ |
Target superheat | ✓ | ✓ | App only |
testo 550s Set (includes digital manifold and 2 wired clamp probes) – Smart measurement device for high/low side pressures and temperatures The testo 550s kit is the ideal set of products for highly reliable and flexible measurement and documentation. Thanks to its smart Bluetooth integration, data can be stored and evaluated reliably and efficiently. The 2 clamp probes facilitate rapid evaporator and condenser temperature measurements, thus ensuring that the refrigeration system is running at maximum efficiency. Technical Data: testo 550s: Temperature measuring range: -58° to +302°F / - 50° to +150°C Temperature measurement accuracy: ±0.9 °F / ±0.5 °C Pressure measuring range: -15 to 870 psi / -1 to 60 bar Pressure measurement accuracy: ±0.5 % of full-scale value Pressure overload relay: 943 psi / 65 bar Vacuum measuring range: -15 to 0 psi / -1 to 0 bar Probe connection type: 2 x plug-in (NTC) Clamp probes: Temperature measuring range: -40 zu 257 °F / -40 to +125 °C Temperature measurement accuracy: ±1.8 °F (-4° to 185 °F) / ±1 °C (-20 to +85 °C) Weight: 3.74 oz. / 106 g Dimensions: 4.7 x 3.0 x 1.3 in. / 120 x 77 x 32 mm System Requirements: requires iOS 11 or higher; requires Android 6 or higher; requires mobile end device with Bluetooth 4.0 Scope of delivery: ✓ 1 x testo 550s app operated manifold, including batteries ✓ 2 x testo wired temperature clamp probes ✓ 1 x Protective case ✓ Banderole, instruction manuals and calibration protocols
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