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iButtons

The Thermochron family of iButtons are temperature data loggers which record and store time, temperature, and optional humidity for later analysis. The iButton's embedded computer chip integrates a globally unique address, a thermometer, a thermal history log, an alarm event log, and additional memory to store user data, such as location data or a shipping manifest. Thermochrons are recyclable and under normal conditions, will log data for up to 10 years or 1 million temperature measurements. The following table is a comparison of the available Thermochron models:  

ModelTemperature RangeAccuracyResolutionValues/ReadingsLogging Rate
DS1921G -40°C to +85°C ± 1°C: -30°C to +70°C
± 1.3°C outside this range
0.5°C 2048 1 to 255 min
DS1921Z -5°C to +26°C ± 1°C 0.125°C 2048 1 to 255 min
DS1922L -40°C to +85°C ± 0.5°C: -10°C to +65°C 0.5°C - 8 bit /
0.0625°C - 11 bit
8192 - 8 bit /
4096 - 16 bit
1 sec to 273 hrs
DS1922T 0°C to +125°C ± 0.5°C: +20°C to +75°C 0.5°C - 8 bit /
0.0625°C - 11 bit
8192 - 8 bit /
4096 - 16 bit
1 sec to 273 hrs
DS1923- Hygrochron -20°C to +85°C
0 to 100% RH
± 0.5°C: -10°C to +65°C 0.5°C - 8 bit /
0.0625°C - 11 bit
8192 - 8 bit /
4096 - 16 bit
1 sec to 273 hrs

 

Scientific Research Projects - iButtons can be discretely located in the environment for monitoring the temperature of ecosystems. Their low-cost makes it possible to have multiple loggers spread throughout an area, and their small size means they can be attached to places previously impossible.

Monitoring Thermally Sensitive Products - iButtons easily attach to containers of frozen or fresh foods, blood products, and chemicals or drug reagents, recording time and temperature during transport and storage. By logging the thermal experience of temperature-sensitive material, you can pinpoint responsibility for spoilage and take corrective action.

For more on iButtons click this link to the iButton FAQ

To download the Quick Start Guide and Manual for the OneWireViewer software that comes with the Connectivity Kit click here:

OneWireViewer Quick Start Guide

OneWireViewer Manual

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