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CalderSafe Mobile® is the technology enabling the easy acquisition of weld data from any job site, without manually downloading directly from the Electrofusion Welder. Data is automatically transferred to the app on your mobile device using Bluetooth then can be sent to preconfigured email addresses of your choice, along with images of the prepared and clamped fitting. Great for project managers!

The weld data can be read using the CalderSafe Weld Analyser software from any global location. This provides quality assurance and verification for completed welds before any reinstatement works are carried out, reducing risks of failed welds and unnecessary reworks.


  • GPS location of fused fittings
  • Send weld data to 4 email addresses
  • Up to 4 images can be taken 
  • Provides 124 point graph of the weld
  • Print individual or summary of weld records
  • CalderSafe Mobile® App is available free on Google Play

View CalderSafe Privacy Policy    Download Weld Analyser 1.7.9

Frequently Asked Questions

How does the CalderSafe system work?

The system comprises of an Android app, a relay server and the Weld Analyser PC app. The app pairs with an electrofusion welding unit via Bluetooth so that it can receive welding data from the unit. GPS location and photographic evidence are captured by the app, combined with the data and relayed to an email address of your choice.

How do I open the CZIP data file?

Firstly you must have the CalderSafe Weld Analyser program installed on your computer. The CZIP file will arrive as an attachment in an email, just double click the attachment and the Weld Analyser program will start up and decode the data. The welding data and entered operator data can be viewed alongside a map of the location, a detailed graph and photographs of the job done.

What platforms does CalderSafe run on?

The CalderSafe app is currently available for Android smartphones (download from Google Play Store) and the Weld Analyser program runs on Windows.

How do I pair the app with the welding unit?

Start the CalderSafe Android app on your phone. Tap “Scan for devices” which will show a list of the nearby Bluetooth devices. Select the ID that matches the welding units’ Bluetooth ID e.g. CalderSafe-1234. This may also be shown as RNBT-1234 on older units. If the phone asks you to confirm an authentication code, select OK.

I’m having trouble Bluetooth pairing the app with the unit, what can I do?

If the welding unit and app won’t connect successfully; please try going to the phone’s settings menu, to the Bluetooth setting menu. Scan for devices and pair with the welding unit here, then return back to the CalderSafe app where you will now be able to connect to the welding unit.

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