 The iButton Capsule is a mechanical enclosure designed to protect Temperature
Logger iButtons (DS1921 and DS1922 series) from moisture, solvents and pressure.
The device consists of a base with the cavity for a F5 iButton, a screw-in plug
with O-ring to seal the enclosure, and a top with two stainless-steel screws to
mount the iButton Capsule to a cable, e.g., to measure temperature at different
levels within a liquid. The cable is inserted into the notch of the plug where
it is held in place by the matching protrusion of the top piece.
Base, plug, and top are made of polyphenylene sulfide (PPS). This material is
chosen for its mechanical properties (remains stable during both long and
short-term exposure to high temperatures), inherent flame resistance, and
outstanding chemical resistance (inert to steam, strong bases, fuels and acids).
Although PPS is virtually insoluble below 200°C, it can be attacked by
chlorinated hydrocarbons. The silicone O-ring matches the temperature and
chemical qualities of the PPS. In addition, it is resistant to sunlight, ozone,
oxygen, and UV light. The chemical stability of the screws does not compromise
that of the PPS and the silicone.
Key Features
- Durable polyphenylene sulfide enclosure
- Protection from moisture, solvents, and pressure
- Waterproof to 34 feet
- For use with DS1921 & DS1922 Temperature Logger iButtons
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