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The WAPI (Water Pasteurization Indicator) is a reusable, inexpensive device employing a plug of soy wax which melts at 65 degrees centigrade (the temperature of water at which all living organisms are killed). The wax is encased in a small tube of clear plastic which is suspended in a container of water using a length of fishing line. | The WAPI (Water Pasteurization Indicator) is a reusable, inexpensive device employing a plug of soy wax which melts at 65 degrees centigrade (the temperature of water at which all living organisms are killed). The wax is encased in a small tube of clear plastic which is suspended in a container of water using a length of fishing line. | ||
[[Image:.284jpg|Fig 1: Women checking the wax in their WAPI after heating water in a solar cooker to 65C]] | |||
Revision as of 16:20, 19 January 2008
The WAPI (Water Pasteurization Indicator) is a reusable, inexpensive device employing a plug of soy wax which melts at 65 degrees centigrade (the temperature of water at which all living organisms are killed). The wax is encased in a small tube of clear plastic which is suspended in a container of water using a length of fishing line.