DS1922E

iButton High-Temperature Logger with 8KB Data-Log Memory

Industry's Smallest Low-Cost Stand-Alone Data-Logger Measuring and Logging Up to 140°C


Description

The iButton® high-temperature logger (DS1922E) 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. A total of 8192 8-bit readings or 4096 16-bit readings, taken at equidistant intervals ranging from 1s to 273hr, can be stored. Additionally, 576 bytes of SRAM store application-specific information. A mission to collect data can be programmed to begin immediately, after a user-defined delay, or after a temperature alarm. Access to the memory and control functions can be password protected. The DS1922E is configured and communicates with a host-computing device through the serial 1-Wire® protocol, which requires only a single data lead and a ground return. Every DS1922E is factory lasered with a guaranteed unique 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.

While all iButton data loggers are calibrated/validated against NIST traceable reference devices, Maxim offers a web application to generate validation certificates for the DS1922L/T data loggers. Input is an iButton registration number (or list of numbers) and the output is a validation certificate in PDF format.
DS1922E: Block Diagram DS1922E: Block Diagram Enlarge+

Key Features

  • 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

Applications/Uses

  • High-temperature Logging (Process Monitoring, Industrial Temperature Monitoring)
  • Steam sterilization
Part Number Interface Technology Applications Usage Memory Type Memory Size Data Logger Type Temp. Readings Oper. Temp.
(°C)
Budgetary
Price
See Notes
DS1922E  1-Wire iButton
Asset Management
Autoclave
Sterilization
Multi Use NV SRAM 512 Bytes Temperature 8192 +15 to +140 $82.63 @1k
See All Data Loggers (10)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

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