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Non-Reversible, Four-Point Temperature Label

Non-Reversible OMEGALABEL™ Temperature Monitors
  • RoHS Icon


Item# ML4C-121-10

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$22.00
5-9 C$20.90
10-24 C$20.46
25-49 C$19.58
50-99 C$19.14
100+ C$18.70

In stock

Lead Time (If not in stock): 6 weeks
Non-Reversible OMEGALABEL™ Temperature Monitors ML4C-121-10 ML4C-121-10
  • Four temperature points per label
  • Indicator turns black when exposed
  • Actual size: 0.5" x 0.2" (12 x 5 mm)
  • Indicating circle: 0.06" (1.5 mm)
  • Sold in Packs of 10 and 30
  • Many temperature ranges available see below!

ML4C-121-10 Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

*Highlighted options are not compatible. Please select a different combination.

Minimum Temperature Measurement
Maximum Temperature Measurement
Number of Labels
Reversible/Non Reversible
Number of Temperature Points
Form Factor
Response Time
Accuracy Value

The ML4C are miniature non-reversible temperature labels. Each label contains 4 dots with different temperature ranges. Upon reaching the rated temperature, the dot will change color. Even though the temperature may drop, the dot will retain the color change as a permanent indication that the temperature was reached.

Model No.
(Pkg 10 or 30)

Temperature Ratings
ML4C-40 °C  40  43 46 49
ML4C-54  °C  54 60 66 71
ML4C-77  °C  77 82 88 93
ML4C-99  °C  99 104 110 116
ML4C-121  °C  121 127 132 138
ML4C-143  °C  143 149 154 160
ML4C-166  °C  166 171 177 182
ML4C-188  °C  188 193 199 204
ML4C-210  °C  210 216  224 232
ML4C-241  °C  241 249 254 260
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How long will this device monitor temperature extremes? The reason I ask is that a customer wants to place our products in storage for about 4 years and I want to ensure that the temperature during this period of time never exceeds 54C.

Asked by: dewrunner
Hi Dewrunner, Storage life is 1 year from shipping date if maintained in controlled environment. I'll add more details regarding your conditions shortly. Best regards OMEGA
Answered by: NorwalkAE
Date published: 2020-06-16


Asked by: Barnical Bill
Thank you for your inquiry. These labels do not come with a certification. All orders come with a Certificate of Conformance via your e-mail.
Answered by: Application Engineer CB
Date published: 2021-06-17
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