Solar Cooking
Solar Cooking
Last edited: 31 January 2018      

The Cool WAPI from North Star Devices

Robert Nepper is involved with the Rotary club in a project to manufacture thousands of Water Pasteurization Indicators (WAPIs) for use in projects throughout the world. This has lead to the creation of the company North Star Devices.


The North Star Devices Solar Pastuerizer schematic, Photo credit: North Star Devices, Inc. 2017

A floating WAPI from North Star Devices, Photo credit: North Star Devices, Inc. 2017

  • December 2013: Robert Nepper reports that they have made improvements to the SuperWAPI, which features a heat resistant stainless steel cable. North Star Devices' WAPI is the only WAPI offered as a hammer together design, not requiring heat sealing. The SuperWAPI is also now available as a kit. Read more about their WAPIs in their latest flyer: Reusable Water Pasteurization Indicators (WAPIs)

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Robert Nepper
North Star Devices Inc.
2251 Shawnee Dr.
N. St. Paul, MN 55109

Tel: +1 (651) 777-5159