HOBO Deep Ocean Temperature Data Logger
HOBO data loggers require HOBOware software and a USB cable. (Note: A USB cable is included w/HOBOware Pro CD or USB software purchase). See compatible items below.
Overview
The HOBO U12 Deep Ocean Water Temperature Data Logger is a single-channel water temperature logger with 12-bit resolution that can record up to 43,000 measurements. With its robust titanium housing, this logger is designed to withstand ocean extremes of depth and temperature.
- 11,000m depth rating (36,080 ft)
- Extended temperature range:- -40 to 125C
- Titanium housing for use in saltwater
- Fast readout via direct USB interface
- Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis
In what environment does this data logger operate?
This data logger operates in an water environment.
What measurements does this data logger support?
The U12-015-03 data logger supports the following measurements: Temperature and Water Temperature
The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.
Choose measurement system:
Some specifications display both measurement systems and/or refer to other similar products when mentioned.
Logger | |
Measurement Range | -40° to 125°C
(-40° to 257°F)
|
Accuracy | ±0.22°C at 25°C , see manual for plot
(±0.4°F at 77°F , see manual for plot)
|
Resolution | 0.025°C at 25°C , see manual for plot
(0.045°F at 77°F , see manual for plot)
|
Response Time in Water | < 4 minutes, typical to 90% |
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 years typical use, factory replaceable |
Memory | 64K bytes (43,000 12-bit measurements) |
Construction | Titanium with O-ring seals and backup rings |
Weight | 105 g
(3.7 oz)
|
Size | 114 x 20.6 mm diameter (4.5 x 0.81 in. diameter) |
Depth Rating | 11,000 m
(36,080 ft)
|
Environmental Rating | IP68 |
NIST Certificate | Available for additional charge; temperature range -30° to 120°C (-22° to 248°F) |
Compliance Marks |

- HOBO U12-015-03 Deep Ocean Temperature Data Logger
- O-Ring replacement kit: four blue O-Rings, four orange backup rings, and silicone-based O-Ring lube
The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.
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Only 3x4 cm, this tiny data logger measures temperatures over a wide temperature range. The TidbiT v2 provides 12-bit resolution and has ±0.2 °C accuracy. It is designed for outdoor and underwater environments and is waterproof to 300 m (1000 ft). An optical USB interface allows users to offload data in seconds. Please note, a solar radiation shield is required to obtain accurate air temperature measurements in sunlight (RS1 Solar Radiation Shield, assembly required; or M-RSA pre-assembled Solar Radiation Shield).
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Detailed Specifications
HOBO Deep Ocean Temperature Data Logger
Choose measurement system:
Some specifications display both measurement systems and/or refer to other similar products when mentioned.
Logger | |
Measurement Range | -40° to 125°C
(-40° to 257°F)
|
Accuracy | ±0.22°C at 25°C , see manual for plot
(±0.4°F at 77°F , see manual for plot)
|
Resolution | 0.025°C at 25°C , see manual for plot
(0.045°F at 77°F , see manual for plot)
|
Response Time in Water | < 4 minutes, typical to 90% |
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 years typical use, factory replaceable |
Memory | 64K bytes (43,000 12-bit measurements) |
Construction | Titanium with O-ring seals and backup rings |
Weight | 105 g
(3.7 oz)
|
Size | 114 x 20.6 mm diameter (4.5 x 0.81 in. diameter) |
Depth Rating | 11,000 m
(36,080 ft)
|
Environmental Rating | IP68 |
NIST Certificate | Available for additional charge; temperature range -30° to 120°C (-22° to 248°F) |
Compliance Marks |