Concrete Temperature Monitor

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Status Explanations for product status codes

Part Number Status
DS9108 Active: In Production. See Ordering Information for details.


This product is a sealed plastic stick containing three DS1921G iButtons®. The iButtons are connected in parallel through metal plates that are spot-welded to the IO and GND contact, respectively. Two stranded wires protruding from the top end of the stick allow for a 1-Wire® reader/writer to make contact to the iButtons for setup and data retrieval. Electrically, the product is specified by the DS1921G data sheet, with the proper scaling (e.g., current ×3, capacitance ×3). The mechanical and thermal characteristics of the module are specified in this document.

Data Sheet

Download this datasheet in PDF formatDownload Rev 1 (PDF, 68kB)
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This product contains lithium-metal batteries. See applicable regulations for transport requirements for batteries in equipment.

Key Features

  • Three DS1921G networked to monitor temperate at the top, bottom and center of the stick
  • Connects to 1-Wire reader/writer through colorcoded 18 AWG (1 mm Ø) stranded wires with ½ inch (1.3cm) stripped ends
  • Electrically compatible to the DS1921G Thermochron iButton (3 in parallel)
  • Sealed against liquid intrusion
  • Module position information stored in DS1921G memory


  • Concrete Maturity Monitoring

Key Specifications:

iButton Products
Part Number Technology Applications Memory Type Memory Size Data Logger Type Data Logger Size Data Logger Sample Rate Data Logger Histogram Data Logger Accuracy Data Logger Resolution Data Logger Measuremt. Range Prog. Alarm Unique Ware Real Time Clock
DS9108  iButton
Asset Management
Temperature Data Logging
NV SRAM 3 x 4K bits Temperature 3 x 2048 Byte 1min to 255min 63-bin ±1°C 0.5°C -20°C to +65°C Temperature High/Low No Yes
See All iButton Products (26)

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.


DS9108: Typical Operating Circuit
Typical Operating Circuit
DS9108: Typical Operating Characteristics
Typical Operating Characteristics

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Rev 1; 2006-10-27
This page last modified: 2008-06-13