DS1993 4Kb Memory iButton 4096 bits of read/write nonvolatile memory.

DS1992:1Kb Memory iButton 1024 bits of Read/Write Nonvolatile Memory (DS1992)

The DS1990A serial number iButton® is a rugged data carrier that serves as an electronic registration number for automatic identification.Can Be Read in Less Than 5ms.Operating Range: 2.8V to 6.0V, -40°C to +85°C

iButton Datalogger DS1923 : -20°C to +85°C; 0 to 100%RH The DS1923 Hygrochron iButton is a logger that measures temperature and humidity.

iButton Datalogger DS1922E : 15 to 140 C The DS1922E Thermochron iButton is a high capacity and extreme temperature logger, suitable for applications such as sterilization and machinery monitoring.

iButton DataloggerDS1922T: 0 to +125°C The DS1922T Thermochron iButton is a high capacity and high temperature logger, suitable for applications such as hot food service and machinery monitoring.

iButton Datalogger DS1922L: -40 to +85°C The DS1922L Thermochron iButton is a high capacity logger suitable for a wide range of applications.

iButton Datalogger:DS1921Z: -5°C to 26°C The DS1921Z Thermochron iButton is a logger suitable for applications such as food and medical supplies.

iButton Datalogger DS1921H: 15°C to 46°C The DS1921H Thermochron iButton is a logger suitable for applications such as incubators and live animals.

DS1921G Thermochron iButton is a logger suitable for a wide range of applications. iButton Datalogger DS1921G : -40 to 85 C