HOBO® U12 Deep Ocean Temperature
Logger (U12-015-03) Manual
14767-A MAN-U12-015-03
The HOBO U12 Deep Ocean Temperature Logger is a single-channel
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 the rigors of saltwater deployment. It has a depth rating to 11,000
meters and a temperature range from -40° to 125°C, making it the ideal logger
to handle the ocean extremes of depth and temperature.
Specifications
Measurement Range
-40° to 125°C (-40° to 257°F)
Accuracy
±0.22°C at 25°C (±0.4°F at 77°F), see Plot A
Resolution
0.025°C at 25°C (0.045°F at 77°F), see Plot A
Drift
0.05°C/year + 0.1°C/1000 hrs above 100°C (0.09°F + 0.02°F/1000 hrs
above 212°F)
Response Time in Water
< 4 minutes, typical to 90%
Time Accuracy
±2 minute per month at 25°C (77°F), see Plot B
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)
Vibration Rating
Navy spec: NAVMAT P-9492
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).
Plot A
Plot B
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
-40
-20
0
20
40
60
80
100
120
Tem perature (°C)
A
ccu
racy/
R
eso
lu
ti
o
n
(°C
)
Accuracy
Resolution
-400
-300
-200
-100
0
100
200
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
T
im
e
Ba
s
e E
rro
r (
P
P
M
)
-17.3
-13.0
-8.6
-4.3
0.0
4.3
8.6
Tim
e
Ba
se
E
rr
o
r (
M
in
/M
ont
h
)
HOBO U12 Deep Ocean
Temperature Logger
U12-015-03
Included Items:
•
O-ring replacement kit
(U12-015-03-ORING-KIT),
which includes 4 blue
O-rings, 4 orange backup
rings, and silicone-based
O-ring lube
Required Items:
•
HOBOware® Pro 3.2 or
later
•
USB Cable (included with
software)
