irrLog | Logger for IRR2-BT

irrLog turns your IRR2-BT into a connected field measurement workflow on your Android phone.

Connect directly over Bluetooth and see irradiance, temperature, inclination and orientation in real time. Record complete measurement sessions, keep the same session running through temporary signal loss with automatic reconnect, and export results as CSV for documentation, reporting or further analysis.

Built for PV installers, inspectors and measurement professionals.

Key features:
• Direct Bluetooth connection to compatible IRR2-BT devices
• Live irradiance, temperature, inclination and orientation
• Complete session logging with timestamps and configurable logging intervals
• Automatic reconnect after temporary Bluetooth signal loss
• Session summary with measurement-quality indicators
• CSV save and share
• Demo Mode for exploring the workflow without hardware
• Available in 16 languages
• No account required
• Measurement data stored locally on your phone
• No ads, analytics or location tracking

Try it first

Try irrLog for 7 days before choosing an access plan. The free period begins only after your first successful connection to a real IRR2-BT — Demo Mode does not start it.

1 Month Access and 1 Year Access are prepaid and do not renew automatically. Full Access is a one-time purchase.

No account required. No ads. No analytics. No location tracking. Your measurement data stays on your device, and the core measurement, logging and CSV export workflow works offline.

Why irrLog exists

irrLog started as a tool I built for my own field work. I wanted a simple and reliable way to connect to the IRR2-BT, view live measurements, log complete sessions and export the results — without accounts, cloud setup or unnecessary complexity.

Once I realized how much value it added to my own workflow, I decided to make irrLog available to other professionals as well.

irrLog is independently developed and maintained by a small business. If you have a practical feature request or would like support for an additional language, please get in touch — feedback from people using irrLog in the field directly shapes future updates.

irrLog is an independent third-party application and is not affiliated with, endorsed, sponsored, certified or developed by Fluke Corporation. Fluke, IRR2-BT and related marks are the property of their respective owners. References to IRR2-BT are solely to identify device compatibility.