Testo 510i Smart Differential Pressure Meter – 0560 1510

The Testo 510i is a compact Bluetooth differential pressure meter that uses your smartphone or tablet as the display, making it a practical choice for static pressure checks, gas pressure checks, and pressure-drop troubleshooting on HVAC systems.

Browse our full manometers & differential pressure gauges range, compare with other Bluetooth smart tools, or explore the wider Testo collection.

Quick summary

The Testo 510i suits HVAC technicians who want a very compact pressure tool for fans, filters, duct static pressure and gas pressure checks, with app-based logging and reporting instead of carrying a larger standalone meter.

Best for

• HVAC technicians checking duct static pressure and pressure drop across filters and fans
• Service and maintenance work where fast app-based logging is useful
• Tradies who already use smartphone-connected Testo tools
• Compact field kits where size and weight matter

Not ideal for

• Users who want a standalone meter with its own large built-in screen
• Full TAB or advanced airflow balancing work where a dedicated micromanometer or larger airflow kit is the better fit
• Anyone carrying out regulated gasfitting work without the appropriate licence or authorisation

Why tradies choose the Testo 510i

• Compact and easy to carry: the 510i is lightweight and easy to keep in a daily service bag.
• App-based display and reporting: view readings on your phone or tablet, save results, and export documentation from site.
• Pressure drop workflow: useful for diagnosing fan and filter restrictions without guessing.
• Timed and multi-point averaging: handy when you want more consistent readings than a quick spot check.
• Magnetic holder: makes setup easier when working around plant, ductwork or panels.
• Good fit for static and gas pressure checks: a strong option when you need compact pressure measurement rather than a large instrument.

Key specs

Compatibility and setup notes

The 510i is strongest for differential pressure, duct static pressure, gas pressure checks, and pressure-drop diagnosis on filters and fans. It is not a full airflow-balancing kit by itself. If your workflow regularly moves into broader airflow measurement and documented balancing, pair it with the right accessories and follow it up with more complete airflow tools where needed.

If your main work is air-balancing and airflow diagnostics, start with our air balancing guide and CFM measurement guide. Need help choosing? Visit our contact page.

What’s included

• Testo 510i differential pressure measuring instrument
• Hose set (Ø 4 mm and 6 mm) with adapter
• 3 x AAA batteries
• Calibration protocol

What you may also need

• More manometers & differential pressure gauges – compare standalone and higher-range options.
• Bluetooth smart tools – useful if you prefer a connected workflow across multiple measurements.
• Testo Heating Smart Case for Smart Probes – helps protect and organise your 510i with other Smart Probes.
• Testo Smart Probes Heating Set – useful if you want to expand beyond pressure into temperature and IR checks.

Official references

• Official Testo 510i product page
• NSW gasfitting licence and certificate guidance

Frequently asked questions

What is the Testo 510i mainly used for?

It is mainly used for differential pressure, duct static pressure, gas pressure checks, and pressure-drop troubleshooting across components such as fans and filters.

Does the Testo 510i have its own display?

No. The instrument is designed to work with your smartphone or tablet, which becomes the display and reporting interface.

Can it help with pressure drop tests?

Yes. Testo includes a pressure-drop measurement menu with alerts in the app workflow.

Can it be used for airflow or volume flow work?

It can support that workflow in the right setup, but it is not a complete replacement for a dedicated airflow-balancing kit.

What comes in the box?

You get the 510i instrument, hose set with adapter, batteries, and calibration protocol.

Is this suitable for gas pressure checks in Australia?

The tool can measure gas pressure, but gasfitting and gas appliance work in Australia is regulated and should only be carried out by appropriately licensed persons within their scope.