HOBO 8K Pendant Temperature/Light Data Logger - UA-002-08

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This HOBO Pendant® data logger is a miniature, waterproof two-channel temperature and relative light level data logger. The 8K model comes at a great value and is suitable for indoor, outdoor, and underwater applications. This logger holds approximately 6.5K of 10-bit readings. Use a solar radiation shield for accurate temperature measurement in sunlight. See RS1 Solar Radiation Shield (assembly required) and M-RSA (pre-assembled) Solar Radiation Shield. Note that using a solar radiation shield prevents the use of the light sensor.

Manufactured by: Onset
Model: HOBO 8K Pendant Temperature/Light Data Logger - UA-002-08

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Light intensity
Soil temperature
Water temperature


Measurement Range
Temperature -20° to 70°C (-4° to 158°F)
Light 0 to 320,000 lux (0 to 30,000 lumens/ft2)
Temperature ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), see Plot A in manual
Light intensity Designed for measurement of relative light levels, see Plot D in manual for light wavelength response
Temperature 0.14°C at 25°C (0.25°F at 77°F), see Plot A in manual
Drift Less than 0.1°C/year (0.2°F/year)
Response Time
Airflow of 2 m/s (4.4 mph) 10 minutes, typical to 90%
Water 5 minutes, typical to 90%
Time accuracy ± 1 minute per month at 25°C (77°F), see Plot B in manual
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 C in manual
NIST traceable certification Available for temperature only at additional charge; temperature range -20° to 70°C (-4° to 158°F)
Battery life 1 year typical use
Battery Type CR2032
UA-002-08 8K bytes (approximately 3.5K combined temperature and light readings or events)
UA-002-64 64K bytes (approximately 28K combined temperature and light 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)
Environmental Rating IP68