Testo 550s Wireless Digital Manifold for Refrigeration System Diagnostics (Pressure, Temperature, Vacuum)

Concrete Data Logging Thermometer

Accurate, multi-channel temperature monitoring for field and lab use

Monitor temperatures precisely from 4 K, J, E, or T type thermocouple probes simultaneously on a large, back-lit multi-line LCD. This thermometer records up to 16,000 data points per channel, which can be downloaded to your computer, or manually logged directly from the keypad. Real-time logging to your computer is also supported via the included bi-directional USB cable and software.

Key Features

Fast-response and high-accuracy readings. User-adjustable auto power-off, audible and visible Hi/Lo alarms, and calibration to ice point or any standard. Displays min, max, average, and Δ (T1-T2) values. Fold-out easel back for easy tabletop use. Includes 4 AAA batteries, 2 beaded Type K wire probes, USB cable, software, and protective foam-lined case. Certificate of compliance traceable to N.I.S.T. available.

Simultaneously display 4 channels

1. Hi / Lo Alarms
2. Ice Point calibration
3. Δ (T1-T2)
4. Min / Max / Ave
5. K, J, E, or T thermocouples

5 Year Warranty, CE Certified

The Digital Manifold is a professional HVAC/R diagnostic tool that replaces traditional analog gauges by using electronic pressure transducers to measure high‑ and low‑side refrigerant pressures and temperature simultaneously, often with automatic superheat and subcooling calculations and in‑built refrigerant libraries for quick setup and accuracy. Digital manifold technology provides faster, more precise data with clear backlit displays and easy‑to‑read digital outputs, helping technicians reduce manual calculations and errors — a key advantage for quality control and service diagnostics on air conditioning, refrigeration, and heat pump systems, as described in industry overviews on modern digital manifold functionality. 

This type of tool is especially valuable to HVAC/R professionals, commercial refrigeration technicians, and maintenance teams who need to verify system performance, conduct leak and pressure diagnostics, and optimize refrigerant charge and energy efficiency; digital manifolds’ intuitive interfaces, data logging capabilities, and built‑in calculations streamline troubleshooting and reporting compared with analog gauge sets and help support compliance and documentation procedures on service jobs. 

Dimensions

7¼" × 2½" × 1¼" (184 × 75 × 29 mm)

Weight

10 oz (290 g)

Standards - Available with Certification

Certificate of Compliance traceable to N.I.S.T. ensures the thermometer's calibration standards are verified against National Institute of Standards and Technology references.

For HVAC and refrigeration professionals performing system diagnostics or installation work

For example, the Testo Smart Probes AC & refrigeration test kit allows technicians to wirelessly measure pressure and temperature directly at key points in the system, enabling detailed analysis and faster troubleshooting of air-conditioning and refrigeration equipment. Accurate temperature verification can also be achieved using the Checktemp® Digital Thermometer, a rugged handheld device designed for fast and precise temperature readings across a wide range of industrial and service applications. In addition, environmental and airflow assessments can be supported by instruments such as the Thermo-anemometer, which provides reliable measurements of air velocity, flow rate, and temperature—important parameters when evaluating HVAC system performance and efficiency. Together, these complementary tools help maintenance teams obtain a more comprehensive understanding of system behavior and operating conditions.

Accurate, multi-channel temperature monitoring for field and lab use

Monitor temperatures precisely from 4 K, J, E, or T type thermocouple probes simultaneously on a large, back-lit multi-line LCD. This thermometer records up to 16,000 data points per channel, which can be downloaded to your computer, or manually logged directly from the keypad. Real-time logging to your computer is also supported via the included bi-directional USB cable and software.

Key Features

Fast-response and high-accuracy readings. User-adjustable auto power-off, audible and visible Hi/Lo alarms, and calibration to ice point or any standard. Displays min, max, average, and Δ (T1-T2) values. Fold-out easel back for easy tabletop use. Includes 4 AAA batteries, 2 beaded Type K wire probes, USB cable, software, and protective foam-lined case. Certificate of compliance traceable to N.I.S.T. available.

Simultaneously display 4 channels

1. Hi / Lo Alarms
2. Ice Point calibration
3. Δ (T1-T2)
4. Min / Max / Ave
5. K, J, E, or T thermocouples

5 Year Warranty, CE Certified

Dimensions

7¼" × 2½" × 1¼" (184 × 75 × 29 mm)

Weight

10 oz (290 g)

Standards - Available with Certification

Certificate of Compliance traceable to N.I.S.T. ensures the thermometer's calibration standards are verified against National Institute of Standards and Technology references.

Specifications - Data Logging Thermometer

Q&A

Can this thermometer log data from all 4 channels at once?

Yes, it simultaneously displays and records temperatures from 4 K, J, E, or T type thermocouple probes.

How do I transfer logged data to a computer?

Use the included bi-directional USB cable and the provided graphic software to download recorded data for analysis.

Is it possible to calibrate the thermometer?

Yes, it can be calibrated to ice point or any other calibration standard you choose.

What industries benefit most from this thermometer?

It is widely used in construction, concrete testing, HVAC, laboratories, and industrial process monitoring due to its high accuracy and multi-channel capability.

Does it come with a warranty?

Yes, it includes a 5-year warranty and CE certification for reliability and safety compliance.

Specifications - Data Logging Thermometer

Q&A

Can this thermometer log data from all 4 channels at once?

Yes, it simultaneously displays and records temperatures from 4 K, J, E, or T type thermocouple probes.

How do I transfer logged data to a computer?

Use the included bi-directional USB cable and the provided graphic software to download recorded data for analysis.

Is it possible to calibrate the thermometer?

Yes, it can be calibrated to ice point or any other calibration standard you choose.

What industries benefit most from this thermometer?

It is widely used in construction, concrete testing, HVAC, laboratories, and industrial process monitoring due to its high accuracy and multi-channel capability.

Does it come with a warranty?

Yes, it includes a 5-year warranty and CE certification for reliability and safety compliance.