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TESTO

Testo is a German manufacturer of portable and fixed measurement instruments, founded in 1957 and headquartered in Lenzkirch, Germany. The company's product range covers HVAC/R, industrial process measurement, food safety, and emissions monitoring. In the HVAC and refrigeration segment, Testo supplies digital manifold gauges, vacuum gauges, refrigerant scales, data loggers, temperature and pressure probes, and related accessories. These instruments are used for commissioning, servicing, and troubleshooting refrigeration circuits, air-conditioning systems, and heat pumps. The product families include the 550s and 550i series digital manifolds, the 552 and 552i series wireless vacuum gauges, and the 560i series wireless temperature and humidity probes. Testo instruments typically feature Bluetooth connectivity for wireless data transmission to smartphones and tablets, and are compatible with the testo Smart App and measureQuick platform. The digital manifold gauges support a range of refrigerants, including R-401B, R-458A, and R-744 (CO2), with two-valve and three-hose configurations. The vacuum gauges measure from 0 to 20,000 micron Hg with accuracy of ±10% or ±10 micron, and use a 7/16 in UNF connection. The refrigerant charging scales offer capacities up to 220 lb with accuracy of ±0.03% ±0.4 oz, and include a built-in display and shoulder bag. Accessories such as quick couplers, evacuation pump oil, and replacement hoses are also part of the line. Testo instruments are designed for field use, with rugged housings and IP ratings on certain models. 3G Electric supplies Testo HVAC/R instruments and accessories to plant engineers, maintenance managers, and procurement specialists worldwide. The catalog includes digital manifold gauge kits, wireless vacuum gauges, electronic refrigerant scales, multi-connection access valves, and evacuation pump oil. 3G Electric supports the line with global logistics, product documentation, and application assistance for refrigerant evacuation, charging, and system diagnostics. The company serves industrial refrigeration, commercial HVAC, and process cooling applications, providing instruments that meet the measurement and durability requirements of field service and plant maintenance teams.

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About TESTO

Testo is a German manufacturer of portable and fixed measurement instruments, founded in 1957 and headquartered in Lenzkirch, Germany. The company's product range covers HVAC/R, industrial process measurement, food safety, and emissions monitoring. In the HVAC and refrigeration segment, Testo supplies digital manifold gauges, vacuum gauges, refrigerant scales, data loggers, temperature and pressure probes, and related accessories. These instruments are used for commissioning, servicing, and troubleshooting refrigeration circuits, air-conditioning systems, and heat pumps. The product families include the 550s and 550i series digital manifolds, the 552 and 552i series wireless vacuum gauges, and the 560i series wireless temperature and humidity probes. Testo instruments typically feature Bluetooth connectivity for wireless data transmission to smartphones and tablets, and are compatible with the testo Smart App and measureQuick platform. The digital manifold gauges support a range of refrigerants, including R-401B, R-458A, and R-744 (CO2), with two-valve and three-hose configurations. The vacuum gauges measure from 0 to 20,000 micron Hg with accuracy of ±10% or ±10 micron, and use a 7/16 in UNF connection. The refrigerant charging scales offer capacities up to 220 lb with accuracy of ±0.03% ±0.4 oz, and include a built-in display and shoulder bag. Accessories such as quick couplers, evacuation pump oil, and replacement hoses are also part of the line. Testo instruments are designed for field use, with rugged housings and IP ratings on certain models. 3G Electric supplies Testo HVAC/R instruments and accessories to plant engineers, maintenance managers, and procurement specialists worldwide. The catalog includes digital manifold gauge kits, wireless vacuum gauges, electronic refrigerant scales, multi-connection access valves, and evacuation pump oil. 3G Electric supports the line with global logistics, product documentation, and application assistance for refrigerant evacuation, charging, and system diagnostics. The company serves industrial refrigeration, commercial HVAC, and process cooling applications, providing instruments that meet the measurement and durability requirements of field service and plant maintenance teams.

Common Applications

  • Commercial HVAC service — Testo 550s series digital manifold gauge kit for R-458A refrigerant during system commissioning and troubleshooting.
  • Industrial refrigeration — Testo 552i wireless digital vacuum gauge for monitoring evacuation of large refrigeration systems to 500 microns.
  • Residential air conditioning — Testo quick coupler (MPN 0554 3112) for accessing service ports on split systems during maintenance.
  • Refrigerant charging — Testo wireless electronic refrigerant scale (MPN 0564 1560 01) for precise charging of R-410A and other refrigerants.
  • Heat pump installation — Testo 550i series manifold gauge kit for R-401B to verify pressures and temperatures during startup.
  • Evacuation pump maintenance — Testo ISO-46 vacuum pump oil (MPN 0564 1002) for routine oil changes on evacuation pumps.

Frequently asked questions

Common questions about TESTO from 3G Electric.

What is the measurement range and accuracy of the Testo 552 series wireless digital vacuum gauge?

The Testo 552 series wireless digital vacuum gauge measures from 0 to 20,000 micron Hg. Its accuracy is specified as ±10% of reading or ±10 micron, whichever is greater. The gauge uses a 7/16 in UNF connection and features Bluetooth connectivity for wireless data transmission to compatible devices. It is designed for monitoring evacuation of HVAC/R systems, with audio and visual indication to help technicians determine when the system has reached the required vacuum level. The 552i series offers similar specifications with additional compatibility for Android operating systems.

Which refrigerants are supported by Testo 550s and 550i series digital manifold gauge kits?

Testo 550s and 550i series digital manifold gauge kits are available in configurations for specific refrigerants. For example, the 550i series kit (MPN 0564 3550 01) is designed for R-401B, while the 550s series kit (MPN 0564 5504 01) supports R-744 (CO2), and another 550s kit (MPN 0564 5501 01) is for R-458A. These kits typically include two valves, three hoses, a carrying case, gauge boots, and a sight glass. They are compatible with the measureQuick and testo Smart systems for wireless data logging and analysis. Always verify the specific refrigerant compatibility before ordering, as kits are configured for particular refrigerant types.

What is the capacity and accuracy of the Testo wireless electronic refrigerant scale?

The Testo wireless electronic refrigerant scale (MPN 0564 1560 01) has a maximum capacity of 220 lb (100 kg). Its accuracy is ±0.03% ±0.4 oz (±0.03% ±10 g). The scale features a built-in display and has dimensions of 11 5/16 in H x 11 5/16 in W x 12 3/16 in L. It includes a shoulder bag for transport. The scale is designed for charging refrigerant into HVAC/R systems, providing precise measurement of refrigerant weight. It operates on AA batteries with a battery life of up to 70 hours. The wireless capability allows remote monitoring during charging procedures.

What is the purpose of Testo quick couplers and access valves?

Testo quick couplers and access valves are used to connect service hoses and gauges to refrigeration and air-conditioning systems. For example, the Testo quick coupler (MPN 0554 3112) features an elbow configuration with a 5/16 in SAE female right-hand connection and includes a depressor. It is designed for residential HVAC and refrigeration systems, enabling technicians to access the system's service ports without losing refrigerant. These accessories are part of the Testo line of service tools and are used during evacuation, charging, and diagnostic procedures. They are compatible with standard SAE flare fittings.

What type of oil is used in Testo evacuation pumps?

Testo evacuation pumps use a clear ISO-46 viscosity grade oil, supplied in an 11 oz bottle (MPN 0564 1002). This oil is specifically formulated for use with Testo evacuation pumps to maintain proper lubrication during refrigerant system evacuation. ISO-46 is a common viscosity grade for vacuum pump oils, providing adequate sealing and lubrication at operating temperatures. It is important to use the correct oil to ensure pump performance and longevity. The oil should be changed according to the pump manufacturer's recommendations or when contaminated.

Are Testo digital manifold gauges compatible with the testo Smart App?

Yes, Testo digital manifold gauges from the 550s and 550i series are compatible with the testo Smart App and measureQuick platform. This allows wireless transmission of measurement data to smartphones and tablets for real-time monitoring, logging, and reporting. The app can display pressure and temperature readings, calculate superheat and subcooling, and generate reports. Compatibility may vary by model and operating system; for example, some models are designed for Android. Always check the specific product specifications for app compatibility and required operating system versions.