HOBO Pendant Temperature/Light Data Logger 64K - UA-002-64

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IMPORTANT: This HOBO data logger requires HOBOware software and a communications device. See compatible items below.

Optical Interface for data transfer

This miniature data logger can record temperature and relative light levels. Complete with waterproof casing, this product is designed for indoor, outdoor, and underwater deployment. This model can store approximately 52,000 measurments of 10-bit readings.


  • Low-cost temperature with alarm indication or light intensity
  • Waterproof housing for wet or underwater use
  • Data readout in less than 30 seconds via fast Optic USB interface

The UA-002-64 Data Logger is for use in Outdoor and Underwater environments

The UA-002-64 Data Logger supports the following measurements:

Temperature, Light Intensity, Water Temp

Onset # UA-002-64
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HOBO Pendant Series Data Loggers

Plot AMeasurement range
Temperature: -20° to 70°C (-4° to 158°F)
Light: 0 to 320,000 lux (0 to 30,000 lumens/ft2)

Plot BAccuracy:
Temperature: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), see Plot A
Light intensity: Designed for measurement of relative light levels, see Plot D for light wavelength response

Temperature: 0.14°C at 25°C (0.25°F at 77°F), see Plot A

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

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

Plot CWater depth rating: 30 m from -20° to 20°C (100 ft from -4° to 68°F), see Plot C

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

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)

Plot DMaterials: 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).

Part Number
Graphing and Analysis
HOBOware Pro Mac/Win (USB cable included)
HOBOware Pro - Mac/Win Data Logger Software - Download Only
Part Number
Data Offload - Base Stations - Shuttles
Optic USB Base Station for Pendant
Optic USB Base Station
HOBO® Waterproof Shuttle
Part Number
Replacement batteries for several data loggers (Pack of 5)
Case Replacement Kit
Pendant Replacement Parts Kit - UA-PARTSKIT
Small Desiccant Pack (25-count)
Part Number
Carrying Case
Pelican Case
Compliance Certificate
Compliance Certificate
Data Offload Couplers
Replacement Pendant Coupler for BASE-U-1
A Replacement Coupler for BASE-U-4
NIST Certification
Setup Charge for NIST Traceable Certification
Please call 1-800-564-4377 to place an order.
NIST testing usually takes between 1-2 weeks.
NIST Temperature point certification
Please call 1-800-564-4377 to place an order. NIST testing usually takes between 1-2 weeks.
Documentation for the UA-002-64

UA 002 Manual

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HOBOware® Growing Degree Days Assistant White Paper

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.

 White Papers:


 Application Stories:

 Tech Notes: