DS1921G-F5# Thermochron, 4K
by Maxim/Dallas iButton ProductsOur DS1921G-F5# is a low-cost, reliable iButton® with a wide temperature range and long battery life. Fit for moderately long logging rates, this simple sensor is perfect for any business looking to track and regulate temperature in their working environment.
The DS1921G-F5# iButton has a temperature range of -40°C to +85°C, with an accuracy of ±1°C in the range of -30° to +70°C and an accuracy of ±1.3°C outside of that range. The resolution of this device is 0.5°C. It can also read up to 2048 values at a logging rate of 1 minute to 255 minutes. Battery life information can be found on the DS1921G-F5# data sheet.
To be used as a Thermochron, the DS1921G-F5# is an excellent choice in precision and price. Thermochron models vary in the operating temperature range, the amount of memory available for storage, and the accuracy of the temperature reading. Please check out the table below for comparisons with other iButton models, as well as our Thermochron and Hygrochron page for more information.
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Thermochron and Hygrochron COMPARISON CHART Both measure and datalog temperature in various ranges and accuracy. Hygrochrons measure humidity in addition to temperature. |
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Model |
Temperature Range | Accuracy | Resolution | Values / Readings | Logging Rate |
| -40°C to +85°C |
+/- 1°C: -30°C to +70°C |
0.5°C | 2048 | 1 to 255 min | |
| +15°C to +46°C | +/- 1°C | 0.125°C | 2048 | 1 to 255 min | |
| -5°C to +26°C | +/- 1°C | 0.125°C | 2048 | 1 to 255 min | |
| +15°C to +140°C |
+/- 1.5°C: 110°C to +140°C |
Programmable |
8192 - 8 bit or 4096 - 16 bit |
1 sec to 273 hrs | |
| -40°C to +85°C |
+/- 0.5°C: -10°C to +65°C |
Programmable |
8192 - 8 bit or 4096 - 16 bit |
1 sec to 273 hrs | |
| 0°C to +125°C |
+/- 0.5°C: +20°C to +75°C |
Programmable |
8192 - 8 bit or 4096 - 16 bit |
1 sec to 273 hrs | |
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Hygrochron |
-20°C to +85°C Includes 0 to 100% humidity logger |
+/- 0.5°C: -10°C to +65°C |
Programmable |
8192 - 8 bit or 4096 - 16 bit | 1 sec to 273 hrs |
