The testo 300+ Flue Gas Analyser Heat Pump Kit is a professional measurement package for engineers working across boiler and heat pump heating systems. It supports combustion testing alongside wider heating diagnostics, making it suitable for modern mixed-technology installations. It is ideal for boiler servicing and combustion checks, heat pump-related service workflows, commissioning, diagnostics and efficiency reporting.

<div style="background-color:#dae4ea; border: 1px solid #648798; padding: 10px;">Are you familiar with the current version? Why not enjoy the benefits that it has to offer: <a href="https://www.testo.com/55x">>> To the new version</a></div>

The kit for app-controlled, wireless measurements and digital documentation on your smartphone. You will get the testo 550i app-controlled digital manifold with Bluetooth, 2-way valve block and sturdy hook. For wireless temperature measurement on either flow/return pipework or for superheat/subcooling calculation, the 2 x testo 115i Smart Probes supplied allow simple and effective measurement, and the testo 770-3 clampmeter can be used for compressor current measurenet and other electrical testing. You&rsquo;ll be ideally equipped to carry out your measuring tasks on either monobloc or split system Heat Pumps ,and the kit can also be used for general refrigeration and air-conditining service applications as well.

The kit for app-controlled, wireless measurements and digital documentation on your smartphone. You will get the testo 550i app-controlled digital manifold with Bluetooth (with sightglass), 2-way valve block and sturdy hook. For wireless temperature measurement on either flow/return pipework or for superheat/subcooling calculation, the 2 x testo 115i Smart Probes supplied allow simple and effective measurement, and the testo 770-3 clampmeter can be used for compressor current measurenet and other electrical testing. You&rsquo;ll be ideally equipped to carry out your measuring tasks on either monobloc or split system Heat Pumps ,and the kit can also be used for general refrigeration and air-conditining service applications as well.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away with the testo 558s Heat Pump Kit. This all-in-one solution includes the testo 558s digital manifold, 2x testo 115i temperature clamps, testo 552i vacuum probe, testo 560i refrigerant scale with valve, and the testo 770-3 clamp meter, giving you the ideal tools for precise and efficient servicing and maintenance. 
The testo 558s features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports Bluetooth connectivity to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With A3 and A2L refrigerant compatibility, an IP54-rated rugged design, and a hybrid power system using both rechargeable and non-rechargeable batteries, the testo 558s Heat Pump Kit is built for every challenge.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away with the testo 558s Heat Pump Kit + hoses. This all-in-one solution includes the testo 558s digital manifold, 2x testo 115i temperature clamps, testo 552i vacuum probe, testo 560i refrigerant scale with valve, testo 770-3 clamp meter, and our hose set,&nbsp;giving you the ideal tools for precise and efficient servicing and maintenance. 
The testo 558s features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports Bluetooth connectivity to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With A3 and A2L refrigerant compatibility, an IP54-rated rugged design, and a hybrid power system using both rechargeable and non-rechargeable batteries, the testo 558s Heat Pump Kit is built for every challenge.

Start your measurements on refrigeration and air conditioning systems and heat pumps straight away with the testo 558s Heat Pump Kit. This all-in-one solution includes the testo 558s digital manifold, 2x testo 115i temperature clamps, testo 552i vacuum probe, testo 560i refrigerant scale with valve, and the testo 770-3 clamp meter, giving you the ideal tools for precise and efficient servicing and maintenance. 
 
The testo 558s features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports Bluetooth connectivity to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With A3 and A2L refrigerant compatibility, an IP54-rated rugged design, and a hybrid power system using both rechargeable and non-rechargeable batteries, the testo 558s Heat Pump Kit is built for every challenge.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away with the testo 558s Heat Pump Kit + 4-piece hose set. This all-in-one solution includes the testo 558s digital manifold, 2x testo 115i temperature clamps, testo 552i vacuum probe, testo 560i refrigerant scale with valve, testo 770-3 clamp meter, and our updated 4-piece hose set,&nbsp;giving you the ideal tools for precise and efficient servicing and maintenance. 
The testo 558s features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports Bluetooth connectivity to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With A3 and A2L refrigerant compatibility, an IP54-rated rugged design, and a hybrid power system using both rechargeable and non-rechargeable batteries, the testo 558s Heat Pump Kit is built for every challenge.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo 558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes, together with the 4-hose charging set included in the kit, offers the ideal basis for carrying out everyday measuring tasks. The testo 558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away. The practical kit containing the testo&nbsp;558s digital manifold with Bluetooth connection to the wireless temperature and vacuum probes, together with the hose set included in the kit, offers the ideal basis for carrying out everyday measuring tasks. The testo&nbsp;558s offers intuitive operation thanks to its touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.

The testo 558s Ultimate Refrigeration Kit is the premier all-in-one solution for HVAC/R professionals, delivering a completely digital and wireless workflow for commissioning, servicing, and maintaining air conditioning and refrigeration systems. At the heart of the kit is the testo 558s Digital Manifold, featuring a user-friendly touchscreen display for intuitive control and on-the-spot analysis of pressures, superheat, and subcooling. The kit&#39;s other components, including the testo 115i Clamp Thermometers and the testo 552i Vacuum Probe, seamlessly connect to the manifold via Bluetooth, eliminating the need for cumbersome hoses and cables.

The testo 550i app-controlled digital manifold with Bluetooth &reg;, 2-way valve block and sturdy hook offers extensive measurement technology in an exceptionally compact format. Use this extremely robust manifold to carry out your everyday work on refrigeration and air conditioning systems and heat pumps wirelessly, with ease and reliability. All using the testo Smart App on your smartphone or tablet.

The kit for app-controlled, wireless measurements and digital documentation on your smartphone. You will get the testo 550i app-controlled digital manifold with Bluetooth, 2-way valve block and sturdy hook, two testo 115i wireless clamp thermometers (Bluetooth, NTC) and a robust transport case. For other wireless measurements, the optional Testo Smart Probes for temperature, humidity and vacuum are the perfect addition. You’ll be ideally equipped to carry out your measuring tasks on refrigeration and air conditioning systems and also heat pumps.

The testo 558s offers an intuitive app feel in the manifold, with touchscreen and clear measurement graphs on a large colour display. In addition to the touchscreen, the manifold can also be operated via keys when working with gloves. Thanks to its A3 and A2L compatibility, high robustness with IP54 and hybrid charging system comprising rechargeable and non-rechargeable batteries, the manifold is ideal for every situation.

Start your wireless measurements on refrigeration and air conditioning systems and heat pumps straight away with the testo 558s Smart Vacuum Kit. This all-in-one solution includes the testo 558s digital manifold, 2x testo 115i temperature clamps, and a&nbsp;testo 552i vacuum probe,&nbsp;giving you the ideal tools for precise and efficient servicing and maintenance. 
The testo 558s features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports Bluetooth connectivity to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With A3 and A2L refrigerant compatibility, an IP54-rated rugged design, and a hybrid power system using both rechargeable and non-rechargeable batteries, the testo 558s Smart Vacuum Kit is built for every challenge.

Start your measurements on refrigeration and air conditioning systems and heat pumps straight away with the&nbsp;testo 558s Smart Vacuum Kit. This all-in-one solution includes the&nbsp;testo 558s digital manifold,&nbsp;2x testo 115i temperature clamps, and a&nbsp;testo 552i vacuum probe,&nbsp;giving you the ideal tools for precise and efficient servicing and maintenance. 
The&nbsp;testo 558s&nbsp;features intuitive touchscreen operation, clear measurement graphs on a large color display, and key-based controls for easy use&mdash;even with gloves. Designed for maximum flexibility, it supports&nbsp;Bluetooth connectivity&nbsp;to wireless temperature and vacuum probes, enabling seamless data transfer and real-time monitoring. 
With&nbsp;A3 and A2L refrigerant compatibility, an&nbsp;IP54-rated rugged design, and a&nbsp;hybrid power system&nbsp;using both rechargeable and non-rechargeable batteries, the&nbsp;testo 558s Smart Vacuum Kit&nbsp;is built for every challenge.

Robust charging hose adapter with 5/16" SAE male thread to 1/4" SAE female thread.

Charging hose adapter 5/16" - 1/4" SAE

Charging hose adapter 5/16" - 1/4" SAE