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Thermochron iButton Device

Product Details

Key Features

Parametric specs for Data Loggers
Interface 1-Wire
Technology iButton
End Equipment Asset Management
Usage Multi Use
Memory Type SRAM
Memory Size 512 Bytes
Data Logger Type Temperature
Temp. Readings 2048
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
22.29
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Simplified Block Diagram

Technical Docs

Data Sheet Thermochron iButton Device Apr 01, 2015
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note Alternatives to the DS1994L 4Kb Plus Time Memory iButton®
Brochure iButton Data Loggers
App Note Understanding the IP (Ingress Protection) Ratings of iButton Data Loggers and Capsule
App Note OneWireViewer Tips and Tricks
App Note Interface 1-Wire USB Adapter with Android
App Note Instructions for Compiling the OneWireViewer for Linux
App Note iButton Mission Data Recovery: memlog User Guide
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note Determining the Mission Parameters for Temperature Logger iButton® Devices
App Note Overview of iButton® Sensors and Temperature/Humidity Data Loggers
App Note What Is an iButton Device?
App Note Exporting DS192x Logger Data from the OneWireViewer into Excel
App Note Exporting Thermochron Data to Excel
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire Software Resource Guide Device Description
App Note 1-Wire Communication Through Software | Maxim Integrated
App Note 1-Wire File Structure
App Note White Paper 7: Thermochron® Mission Authentication and Security
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications
Tutorial Guide to 1-Wire Communication | Maxim Integrated
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
Tutorial Choosing the Logger iButton That's Right for You

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Parameters

Parametric specs for Data Loggers
Interface 1-Wire
Technology iButton
End Equipment Asset Management
Usage Multi Use
Memory Type SRAM
Memory Size 512 Bytes
Data Logger Type Temperature
Temp. Readings 2048
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
22.29

Key Features

  • High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
    • Accuracy ±1°C from -30°C to +70°C (See the Electrical Characteristics for Accuracy Specification)
    • Digital Thermometer Measures Temperature in 0.5°C Increments
    • Built-In Real-Time Clock (RTC) and Timer Has Accuracy of ±2 Minutes per Month from 0°C to +45°C
    • Automatically Wakes Up and Measures Temperature at User-Programmable Intervals from 1 Minute to 255 Minutes
    • Logs Consecutive Temperature Measurements in 2kB of Datalog Memory
    • Records a Long-Term Temperature Histogram with 2.0°C Resolution
    • Programmable Temperature High and Temperature Low Alarm Trip Points
    • Records Up to 24 Timestamps and Durations When Temperature Leaves the Range Specified by the Trip Points
    • Individually Calibrated in a NIST-Traceable Chamber
    • Complies to Standard EN12830
    • 512 Bytes of General-Purpose Battery-Backed SRAM
  • Rugged Construction Survives Harsh Environments
    • Water Resistant Enclosure (IP56) or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant 3 ATM Requirements)
    • CE, FCC, and UL913 Certifications
  • Simple Serial Port Interfaces to Most Microcontrollers for Rapid Data Transfer
    • Communicates to Host with a Single Digital Signal Up to 15.4kbps at Standard Speed or Up to 125kbps in Overdrive Mode Using 1-Wire Protocol

Applications/Uses

  • Temperature Logging in Cold Chain, Food Safety, Pharmaceutical, and Medical Products

Description

The Thermochron® iButton® device (DS1921G) 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 255min 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 also records 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 battery-backed SRAM allow storing information pertaining to the object to which the DS1921G is associated. Data is transferred serially through 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.

Simplified Block Diagram

DS1921G: Block Diagram DS1921G: Block Diagram Zoom icon

Technical Docs

Data Sheet Thermochron iButton Device Apr 01, 2015
App Note Reading and Writing 1-Wire® Devices Through Serial Interfaces
App Note Alternatives to the DS1994L 4Kb Plus Time Memory iButton®
Brochure iButton Data Loggers
App Note Understanding the IP (Ingress Protection) Ratings of iButton Data Loggers and Capsule
App Note OneWireViewer Tips and Tricks
App Note Interface 1-Wire USB Adapter with Android
App Note Instructions for Compiling the OneWireViewer for Linux
App Note iButton Mission Data Recovery: memlog User Guide
App Note Understanding the DS1WM Synthesizable 1-Wire Bus Master
App Note Determining the Mission Parameters for Temperature Logger iButton® Devices
App Note Overview of iButton® Sensors and Temperature/Humidity Data Loggers
App Note What Is an iButton Device?
App Note Exporting DS192x Logger Data from the OneWireViewer into Excel
App Note Exporting Thermochron Data to Excel
App Note Understanding and Using Cyclic Redundancy Checks with Maxim 1-Wire and iButton Products
App Note 1-Wire Software Resource Guide Device Description
App Note 1-Wire Communication Through Software | Maxim Integrated
App Note 1-Wire File Structure
App Note White Paper 7: Thermochron® Mission Authentication and Security
App Note White Paper 5: Using 1-Wire APIs for Data Sheet Commands
App Note Using the DS2480B Serial 1-Wire® Line Driver
App Note 1-Wire Search Algorithm
App Note Software Methods to Achieve Robust 1-Wire® Communication in iButton® Applications
Tutorial Guide to 1-Wire Communication | Maxim Integrated
Tutorial Guidelines for Reliable Long Line 1-Wire Networks
Tutorial Choosing the Logger iButton That's Right for You

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .