HOBO® U12 Stainless Temperature
Data Logger (U12-015 and U12-015-02) Manual
7938-K MAN-U12-015
The HOBO U12 Stainless Temperature Data Logger is a single-channel
temperature logger with 12-bit resolution that can record up to 43,000
measurements. The logger uses a direct USB interface for launching and data
readout by a computer or HOBO shuttle.
The U12-015-02 model is the same as the U12-015 model, but also includes a
5-inch probe.
Specifications
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
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
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
316 series stainless steel, EPDM or Viton O-ring; see
Food-Grade
Compliance
section for additional details
Weight
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
Vibration Rating
Navy spec: NAVMAT P-9492 (non-probe model only)
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).
Connecting the Logger
The U-Family logger requires a USB interface cable to connect to the computer. If possible,
avoid connecting at temperatures below 0°C (32°F) or above 50°C (122°F).
1.
Remove the stainless steel end-cap from the logger by turning it counter-clockwise. If
the cap is difficult to turn, place the stem of a small screwdriver through the hole in the
end-cap for better leverage.
2.
Plug the large end of the USB
interface cable into a USB port on the
computer.
3.
Plug the small end of the USB
interface cable into the logger as
shown in the diagram at right.
HOBO U12 Stainless
Temperature Logger
Models: U12-015
U12-015-02
Included Items:
•
O-Ring Replacement Kit
(U12-015-ORING-E for EPDM
and U12-015-ORING-V for
Viton)
•
Five-inch Probe (with
U12-15-02 only)
Required Items:
•
HOBOware® (go to
www.onsetcomp.com/
hoboware-free-download)
•
USB cable
Plot A
Plot B
-400
-300
-200
-100
0
100
200
-40
-20
0
20
40
60
80
100
120
Temperature (°C)
T
im
e B
a
se
Er
ro
r (
P
PM
)
-17.3
-13.0
-8.6
-4.3
0.0
4.3
8.6
Tim
e
B
as
e
E
rror
(M
in
/Mo
n
th
)
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