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1 wire grass temperature sensor
Mounting clips
Glass tube 150 mm length X 7 mm diameter
The 1 wire grass temperature sensor consists of a glass tube with a copper coil wire mounted on the end of a  DS18S20. at each end of the glass tube is a plastic fitting this is sealed in place using some silicone adhesive this Has made the glass tube waterproof,

The idea behind this is to get a accurate constant temperature across the glass tube

Copper wire coil
Online 17/03/2012