HOBO Stainless Temperature (4,900 ft.) Data Logger

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The HOBO U12 Stainless Temperature Data Logger is ideal for food, pharmaceutical, autoclave, and other applications where high-accuracy temperature data is critical. With its broad temperature range (-40 to 125C) and food-grade stainless steel housing, the U12 Stainless Temperature Data Logger withstands process conditions from pasteurization to flash freezing and washdown. The U12 Stainless is also ideal for high-temperature or deep underwater applications.

Manufactured by: Onset
Model: HOBO Stainless Temperature (4,900 ft.) Data Logger

Services offered for this product

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  • Installation
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Water temperature


Measurement range -40° to 125°C (-40° to 257°F)
Accuracy ± 0.25°C from 0° to 50°C (± 0.45°F from 32° to 122°F), see Plot A in manual
Resolution 0.03°C at 25°C (0.05°F at 77°F), see Plot A
Drift 0.05°C/year + 0.1°C/1000 hrs above 100°C (0.09°F/year + 0.2°F/1000 hrs above 212°F)
Response time in 1 m/s (2.2 mph) airflow
U12-015 < 10 minutes, typical to 90%
U12-015-02 2.25 minutes, typical to 90%
Response time in water
U12-015 < 3.5 minutes, typical to 90%
U12-015-02 20 seconds, typical to 90%
Time accuracy ± 2 minute per month at 25°C (77°F), see Plot B in manual
Operating environment Air, water, steam, 0 to 100% RH
Operating temperature
Logging -40° to 125°C (-40° to 257°F)
Launch/readout 0° to 50°C (32° to 122°F), per USB specification
Battery life 3 year typical use, factory replaceable
Memory 64K bytes (43,000 12-bit measurements)
Construction Food-grade 316 Series Stainless Steel
U12-015 72 g (2.5 oz)
U12-015-02 82 g (2.9 oz)
Logger dimensions 17.5 x 101.6 mm (0.69 x 4.00 inches)
Probe dimensions (U12-015-02 only): 4 x 124 mm (0.16 x 4.90 inches)
Pressure/depth rating 2200 psi (1500 m/4900 ft) maximum
NIST certificate Available for additional charge; temperature range -30° to 120°C (-22° to 248°F)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).