background image

HOBO

®

 Pendant G 

Acceleration Data Logger 
(Part # UA-004-64) 

© 2006 Onset Computer Corporation 
Part #: MAN-UA-004, Doc #: 10872-A 

Inside this package: 

 

HOBO Pendant G Acceleration Data 
Logger 

 

Mounting bracket and screw 

 

Doc # 10872-A, MAN

-

UA

-

004 

Onset Computer Corporation 

 

Thank you for purchasing a HOBO data logger. With proper care, it will 
give you years of accurate and reliable measurements. 

The HOBO Pendant G Acceleration Data Logger is a waterproof, 
three-channel logger with 8-bit resolution and can record up to 
approximately 21,800 combined x-, y-, and z-axis acceleration readings or 
internal logger events. The logger uses a coupler and optical base station 
with USB interface for launching and data readout by a computer.  

The logger can be used for a wide variety of experiments, demonstrations 
and field studies by measuring dynamic acceleration resulting from motion, 
shock or vibration. It can also detect static acceleration of gravity, making 
it possible to measure tilt, activity, and inclination. 

The logger uses an internal three-axis accelerometer with a range of 

± 

g

 

based on micro-machined silicon sensors consisting of beams that deflect 
with acceleration. These beams are arranged to act as a variable capacitor. 
As the beams move, the capacitance changes proportionately. This 
capacitance change is converted to voltage, filtered and measured by the 
logger, and displayed in the software in units of 

g

-force. 

A base station, coupler, and HOBOware

®

 software are required for logger 

operation. Visit www.onsetcomp.com for compatibility information. 

 

Specifications 

Measurement 
range 

± 3 

g

; 29.4 m/s² (96.5 ft/s²) 

Accuracy 

± 0.075 

g

; 0.735 m/s² (2.41 ft/s²) at 25°C (77°F) 

± 0.105 

g

; 1.03 m/s² (3.38 ft/s²) from -20°C to 70°C (-4°F to 

158°F) 

Resolution 0.025 

g

; 0.245 m/s² (0.8 ft/s²) 

Logging 
interval 

1 second to 18 hours, 12minutes, 15 seconds in Normal mode 
0.01 seconds (100 Hz) to 0.99 seconds (1.01 Hz) in Fast mode 

Time accuracy  ± 1 minute per month at 25°C (77°F), see Plot A 
Operating 
range 

In water/ice: -20° to 50°C (-4° to 122°F) 
In air: -20° to 70°C (-4° to 158°F) 

Water depth 
rating 

30 m from -20° to 20°C (100 ft from -4° to 68°F), see Plot B 

Battery life 

1 year typical use in Normal mode;  
7 days logging at 0.01 seconds (100 Hz) in Fast mode 

Memory 

64K bytes (approximately 21.8K combined x-, y-, and z-axis 
readings or events) 

Materials Polypropylene 

case; 

stainless steel screws; Buna-N o-ring 

Weight 

18 g (0.6 oz) 

Dimensions 

58 x 33 x 23 mm (2.3 x 1.3 x 0.9 inches) 

 

The CE Marking identifies this product as complying with the 
relevant directives in the European Union (EU). 

 
 

 

 

-125

-100

-75

-50

-25

0

25

-20

0

20

40

60

Temperature (°C)

T

im

eb

as

e

 E

rro

r (

p

p

m

)

 

Plot A 

0

10

20

30

40

-20

0

20

40

60

Temperature (°C)

D

e

pt

h (

m

)

Waterproof 

range

 

Plot B 

Reviews: