BUY DS1921G-F5 https://www.utsource.net/itm/p/4403153.html
Thermochron IButton The DS1921G Thermochron? iButton? is a rugged, self-sufficient system that measures temperature and records the result in a protected memory section. The recording is done at a user-defined rate, both as a direct storage of temperature values as well as in the form of a histogram. Up to 2048 temperature values taken at equidistant intervals ranging from 1 to 255 minutes can be stored. The histogram provides 63 data bins with a resolution of 2.0°C. If the temperature leaves a user-programmable range, the DS1921G will also record when this happened, for how long the temperature stayed outside the permitted range, and if the temperature was too high or too low. An additional 512 bytes of read/write NV memory allow storing information pertaining to the object to which the DS1921G is associated. Data is transferred serially via the 1-Wire? protocol, which requires only a single data lead and a ground return. Every DS1921G is factory-lasered with a guaranteed unique electrically readable 64-bit registration number that allows for absolute traceability. The durable stainless steel package is highly resistant to environmental hazards such as dirt, moisture, and shock. Accessories permit the DS1921G to be mounted on almost any object, including containers, pallets, and bags.
Description: The DS1921G-F5 is a button-style iButton device from Dallas Semiconductor. It is a rugged, portable data carrier that acts as an electronic registration number, a universal tool for data logging, and a secure means of data transfer. Features: Non-volatile memory: 32 bytes of user-programmable, write-protected memory Operating temperature range: -40°C to +85°C Durable stainless steel construction Button-style design for easy attachment Low-power CMOS technology On-board 16-bit CRC generator Applications: Asset tracking Data logging Access control Automated meter reading Temperature monitoring (For reference only)