Accuracy Pro

Manual multi-position measuringinstrument for mechanical watches.


A breakthrough technology in a sleek design.

The Accuracy Pro is a high-end manual multi-position acoustic sensor which brings to an end years of lack of innovation in the field of watch measuring instruments.




A fundamental rethinking.

From the design to the final assembly, each phase of the development of the Accuracy Pro has been made down to the smallest detail, in a unique partnership between Petitpierre and H2i Swiss companies.

The Accuracy Pro is entirely made in a high grade anodized aluminum alloy by Petitpierre. All sensitive elements potentially in contact with the external parts of the watch are coated with a soft-touch rubber.

For the Accuracy Pro, the Swiss start-up H2i developed a brand new electronic board based on the premium XMOS micro-controller, a flawless Hi-res USB audio processor.




A new Windows App with everything you need.

The Accuracy Pro comes with a newly developed Windows App which integrates all the features you need: realtime scope view, diagram display, dispersion over time, cumulated graphs, tabular and radar chart.


Your data is precious

The Accuracy Windows App natively integrates both local and remote databases, using Microsoft SQL compact.
Your results and measurement parameters are saved and shared.




Windows 10 / iOS 9.3 / Android 6 (and later)

Integrated TCXO timebase

Measurement precision: < +/- 0.1 s/d

Connector: USB-type C

Dimensions: 120x140x170 mm (WxHxD)

Weight: 960 g

Black anodized aluminum unibody

Soft-touch coating

2-year international warranty