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.
These versatile loggers are suitable for a wide range of applications such as:
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.
Choosing the Right Thermochron for the Temperature Monitoring Application - Each Thermochron model holds unique qualities (temperature range, accuracy, resolution & logging capacity) which provides the flexibility required for a wide range of applications. However, selecting the Thermochron best suited for a specific application can be a challenging process for those new to Thermochrons. Consider the following questions will provide guidance in the selection process:
The capacity can always be increased by deploying the loggers in pairs. This it particularly useful for the DS1923 since it can be paired with a more economical DS1922L. In those cases, the DS1923 is configured to only poll humidity while the DS1922L handles the temperature logging.
With the exception of the DS1922E model, which is most often used for specialized high temperature monitoring applications, the DS1922, DS1923, and DS1925 models have an accuracy of ±0.5°C over the majority of their
operating temperature range. The DS1921 models peak at an accuracy of ±1.0°C, but they do so at a lower cost.