Top
/content/maximintegrated/en/products/ibutton-one-wire/data-loggers

Temperature and humidity data loggers are designed for use in specific applications, such as pharmaceutical and life science cold chain distribution, fresh produce distribution, process monitoring, environmental monitoring and autoclave temperature data logging. Each device is programmable and can be re-programmed and used for many years.

iButton® data loggers are durably packaged modules enhanced by our 1-Wire communications protocol. iButton Thermochron® temperature data loggers make it simple and inexpensive to monitor and log temperature data of critical assets, helping to ensure integrity throughout the manufacturing process, sterilization cycle, or cold chain distribution.

For applications where both temperature and humidity are important, iButton Hygrochron data loggers record and report both temperature and humidity data as a function of time.

Our USB temperature data logger is equipped with an external thermistor probe to log temperature in extremely cold environments. The logger is also capable of recording ambient temperature, and is suitable for life science applications where temperature data from the cold chain is paramount to maintaining asset integrity through to the final destination.

Also See

Get Started: Thermochron iButton Starter Kit

 

Blogs

How iButton Can Enhance Food Quality

May 15, 2018

Swiss laboratory Empa used Maxim's iButton to create fruit-sensing technology that enhances quality of produce shipments.

Get Technical Tips from Maxim Unfiltered Videos

March 07, 2018

Preview the short video tutorials on the “Maxim Unfiltered” YouTube playlist. It’s another way to help you be as productive as possible with Maxim ICs.

See more
DS1923 iButton Hygrochron Temperature/Humidity Logger with 8KB Data-Log Memory
The iButton® temperature/humidity logger (DS1923) is a rugged, self-sufficient system that measu...
  • High Accuracy, Full-Featured Digital Temperature and Humidity Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
    • Digital Hygrometer Measures Humidity with 8-Bit (0.6%RH) or 12-Bit (0.04%RH) Resolution
    • Temperature Accuracy Better Than ±0.5°C from -10°C to +65°C with Software Correction
    • Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
    • Operating Range: -20°C to +85°C; 0 to 100% RH (see Safe Operating Range Graph)
    • Automatically Wakes Up, Measures Temperature and/or Humidity, and Stores Values in 8kB of Data-Log Memory in 8-Bit or 16-Bit Format
    • Built-In Capacitive Polymer Humidity Sensor for Humidity Logging
    • Sampling Rate from 1s Up to 273hr
    • Programmable High and Low Trip Points for Temperature and Humidity Alarms
    • Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point
    • 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory
    • Two-Level Password Protection of All Memory and Configuration Registers
    • Individually Calibrated in a NIST-Traceable Chamber
    • Calibration Coefficients for Temperature and Humidity Factory Programmed Into Nonvolatile (NV) Memory
  • Rugged Construction Survives Harsh Environments
    • Hydrophobic Filter Protects Sensor Against Dust, Dirt, Contaminants, and Water Droplets/ Condensation with IP56 Enclosure Rating
    • 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
    • Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function
DS1925 iButton High-Density Temperature Logger with 122KB Data-Log Memory
The iButton® temperature logger (DS1925) is a rugged, self-sufficient system that measures tempe...
  • Provides High-Quality Temperature Exposure Assessment of an End Product
    • Temperature Measurement Accuracy of ±0.5°C with Storage for Up to 125,440 Timestamped Values
    • Flexibility to Monitor and Data-Log Long Duration Exposures with Short-Duration Time Intervals
    • Unique Factory-Lasered 64-Bit Serial Number Ensures Absolute Traceability Because No Two Parts Are Alike
  • Highly Configurable Options for Data Logging and Security
    • Programmable Sample Rates from 5min to 273hrs
    • Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point
    • Two-Level Password Protection of All Memory and Configuration Registers
    • Measure and Report Internal Battery Level and Output-Logged Data if a Battery is Depleted
  • Physically Robust, Operationally Efficient
    • Durable Stainless-Steel Enclosure Withstands Harsh Environments and Conditions
    • Communicates to a Host System with the Single-Contact 1-Wire Interface
    • -40°C to +85°C Operating Temperature Range
DS1922E iButton High-Temperature Logger with 8KB Data-Log Memory
The iButton® high-temperature logger (DS1922E) is a rugged, self-sufficient system that measures...
  • High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
    • Temperature Accuracy: ±1.5°C from +110°C to +140°C, ±7°C typical from +15°C to +110°C
    • Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
    • Operating Temperature Range: +15°C to +140°C
    • Automatically Wakes Up, Measures Temperature, and Stores Values in 8KB of Data-Log Memory in 8- or 16-Bit Format
    • Sampling Rate from 1s Up to 273hr
    • Programmable High and Low Trip Points for Temperature Alarms
    • Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point
    • 576 Bytes of General-Purpose Memory
    • Two-Level Password Protection of All Memory and Configuration Registers
  • Rugged Construction Survives Harsh Environments
    • Water Resistant or Waterproof if Placed Inside DS9107 iButton Capsule (Exceeds Water Resistant 3 ATM Requirements)
  • 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
    • Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function
MAX66960 -80°C Temperature Data Logger with External Thermistor Probe
The MAX66960 is a temperature data logger that is ideally suited to monitor and log the ambient ...
  • Provides High-Quality Assessment of Storage Temperature Profiles
    • 16-Bit Temperature Measurements with Storage for 65,536 Time-Stamped Values
    • Flexibility to Monitor and Datalog Long Duration Shipments with Short-Duration Time Intervals
    • Rugged IP42 Construction Survives Harsh Environments
    • Meets CE EMC Directive of EN 61326-1
    • Tested for Portable Electronic Devices for Use on Airplanes per RTCA/DO-160G
  • Highly Configurable Options for Data Logging and Security
    • Optimize Logger Operation for Specific Shipment Conditions
    • Protect Settings and Data from Unauthorized Modification
  • Easy to Start/Stop Logging of Missions
    • Pushbuttons and LEDs for Control and Status
    • Visual Indication of Logger and Battery Status
DS1922F Digital Sterilization Monitor for Autoclave Sterilizers
The DS1922F is a complete solution for real-time digital indication and data record keeping for ...
  • Verifies Autoclave Sterilization Time and Temperature
    • Automatically Measures and Stores Temperature and Time Readings
    • If the Cycle Fails, Indicates at What Time the Failure Occurred
    • If the Cycle Fails, Indicates the Failure Reason and Maximum Temperature Reached by Autoclave
    • Withstands Harsh Autoclave Sterilization Cycles
  • Simplifies Recordkeeping by Eliminating Paper Log Books and Printouts
    • Programmable Operation and Results Uploading Using Companion PC Software
    • PC Software Securely Prevents Tampering, Modification, or Addition of Spurious Records
  • Precalibrated and Easy to Use
    • Precalibrated to NIST Traceable References
    • Compatible with Any Steam-Sterilization Autoclave Cycle Duration with Temperature Up to +140°C
    • Typically 150 Uses Before Replacement
  • Supplement to Biological Indicators
    • Use the DS1922F as an Instant Proxy Indicator While Waiting on Spore Test Results
DS1921G Thermochron iButton Device
The Thermochron® iButton® device (DS1921G) is a rugged, self-sufficient system that measures tem...
  • 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
DS1922L iButton Temperature Loggers with 8KB Data-Log Memory
The iButton® temperature loggers (DS1922L/T) are rugged, self-sufficient systems that measure te...
  • High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
    • Temperature Accuracy of ±0.5°C from -10°C to +65°C (DS1922L), ±0.5°C from +20°C to +75°C (DS1922T), with Software Corrections
    • Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
    • Operating Temperature Range: DS1922L: -40°C to +85°C; DS1922T: 0°C to +125°C
    • Automatically Wakes Up, Measures Temperature, and Stores Values in 8kB of Data-Log Memory in 8- or 16-Bit Format
    • Sampling Rate from 1s Up to 273hr
    • Programmable High and Low Trip Points for Temperature Alarms
    • Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point
    • 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory
    • Two-Level Password Protection of All Memory and Configuration Registers
    • Individually Calibrated in a NIST-Traceable Chamber
    • Complies to Standard EN12830
  • 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
    • Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function
DS1922T iButton Temperature Loggers with 8KB Data-Log Memory
The iButton® temperature loggers (DS1922L/T) are rugged, self-sufficient systems that measure te...
  • High Accuracy, Full-Featured Digital Temperature Logger Simplifies Temperature Data Collection and Dissemination of Electronic Temperature Record
    • Temperature Accuracy of ±0.5°C from -10°C to +65°C (DS1922L), ±0.5°C from +20°C to +75°C (DS1922T), with Software Corrections
    • Measures Temperature with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution
    • Operating Temperature Range: DS1922L: -40°C to +85°C; DS1922T: 0°C to +125°C
    • Automatically Wakes Up, Measures Temperature, and Stores Values in 8kB of Data-Log Memory in 8- or 16-Bit Format
    • Sampling Rate from 1s Up to 273hr
    • Programmable High and Low Trip Points for Temperature Alarms
    • Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point
    • 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory
    • Two-Level Password Protection of All Memory and Configuration Registers
    • Individually Calibrated in a NIST-Traceable Chamber
    • Complies to Standard EN12830
  • 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
    • Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function
DS1921H High-Resolution Thermochron iButton Devices
The Thermochron® iButton® devices (DS1921H/Z) are rugged, self-sufficient systems that measure t...
  • Digital thermometer measures temperature 1/8°C increments with ±1°C accuracy
  • Built-in real-time clock (RTC) and timer has accuracy of ±2 minutes per month from 0°C to 45°C
  • Water resistant or waterproof if placed inside DS9107 iButton capsule (Exceeds Water Resistant 3 ATM requirements)
  • Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes
  • Logs consecutive temperature measurements in 2KB of datalog memory
  • Records a long-term temperature histogram with 1/2°C resolution
  • Programmable temperature-high and temperature-low alarm trip points
  • Records up to 24 time stamps and durations when temperature leaves the range specified by the trip points
  • 512 bytes of general-purpose battery-backed SRAM
  • Communicates to host with a single digital signal at 15.4kbits or 125kbits per second using 1-Wire protocol
  • Fixed range: H: +15°C to +46°C; Z: -5°C to +26°C
Common iButton Features
  • Digital identification and information by momentary contact
  • Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike
  • Multidrop controller for 1-Wire net
  • Chip-based data carrier compactly stores information
  • Data can be accessed while affixed to object
  • Button shape is self-aligning with cup-shaped probes
  • Durable stainless steel case engraved with registration number withstands harsh environments
  • Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim
  • Presence detector acknowledges when reader first applies voltage
DS1921Z High-Resolution Thermochron iButton Devices
The Thermochron® iButton® devices (DS1921H/Z) are rugged, self-sufficient systems that measure t...
  • Digital thermometer measures temperature 1/8°C increments with ±1°C accuracy
  • Built-in real-time clock (RTC) and timer has accuracy of ±2 minutes per month from 0°C to 45°C
  • Water resistant or waterproof if placed inside DS9107 iButton capsule (Exceeds Water Resistant 3 ATM requirements)
  • Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes
  • Logs consecutive temperature measurements in 2KB of datalog memory
  • Records a long-term temperature histogram with 1/2°C resolution
  • Programmable temperature-high and temperature-low alarm trip points
  • Records up to 24 time stamps and durations when temperature leaves the range specified by the trip points
  • 512 bytes of general-purpose battery-backed SRAM
  • Communicates to host with a single digital signal at 15.4kbits or 125kbits per second using 1-Wire protocol
  • Fixed range: H: +15°C to +46°C; Z: -5°C to +26°C
Common iButton Features
  • Digital identification and information by momentary contact
  • Unique, factory-lasered and tested 64-bit registration number (8-bit family code + 48-bit serial number + 8-bit CRC tester) assures absolute traceability because no two parts are alike
  • Multidrop controller for 1-Wire net
  • Chip-based data carrier compactly stores information
  • Data can be accessed while affixed to object
  • Button shape is self-aligning with cup-shaped probes
  • Durable stainless steel case engraved with registration number withstands harsh environments
  • Easily affixed with self-stick adhesive backing, latched by its flange, or locked with a ring pressed onto its rim
  • Presence detector acknowledges when reader first applies voltage