DS1921H-F5 - Dallas Thermochron iButton +15°C thru +46°C

The DS1921H Thermochron iButtons are rugged, self-sufficient systems that measure temperature and record 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 64 data bins with a resolution of 0.5°C. If the temperature leaves a user-programmable range, the DS1921H 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. Additional 512 bytes of read/write NV memory allow storing information pertaining to the object to which the DS1921H is associated. Data is transferred serially via the 1-Wire protocol, which requires only a single data lead and a ground return. Every DS1921H 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 DS1921H to be mounted on almost any object, including containers, pallets, and bags.

Thermochron, iButton, and 1-Wire are registered trademarks of Dallas Semiconductor.

Key Features

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°to 45°C
Automatically wakes up and measures temperature at user-programmable intervals from 1 to 255 minutes
Logs up to 2048 consecutive temperature measurements in protected nonvolatile (NV) random access 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 read/write NV random access memory
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
Water resistant or water proof if placed inside DS9107 iButton capsule.

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.
Meets UL#913 (4th Edit.). Intrinsically Safe Apparatus: Approved Under Entity Concept for Use in Class I, Division 1, Group A, B, C and D Locations (application pending).

Key Specifications

Part Number

Memory Type

Memory Size

Temperature

Other

Package

DS1921H

NV RAM

4K bits

+15C to +46C

· ±1°C Accuracy

· 0.125°C Resolution
· 2048-Byte Temperature Log
· 64-bin Temperature Histogram
· High/Low Temperature Alarms

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Support / Documentation

Downloadable manuals, knowledgebase articles, and more can be found by searching our technical support website.

Purchasing Information

Product Options

Version

DS1921H-F5# (RoHS Compliant) - Add $0.00
17 available for immediate shipment.

DS1921H-F5 (original version - Not RoHS compliant) - Add $0.00
578 available for immediate shipment.

Volume Price
Quantity	Price Each
1-9	$22.00
10-24	$19.80
25-49	$18.00
50-99	$16.20
100-999	$15.00
1000+	$13.50

Shipping Weight: 0.01 pounds

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