Part Number - UA-001-64

HOBO 64K Pendant Temperature/Alarm (Waterproof) Data Logger

$79.00 USD
A miniature, value-priced, waterproof data logger for temperature monitoring applications; stores 52K measurements.

Important Information

Requires HOBOware software and either an Optic USB Base Station or a HOBO Waterproof Shuttle (U-DTW-1). HOBOware Pro is required when using the HOBO Waterproof Shuttle. See compatible items below.

Compatible with


A miniature, value-priced, waterproof data logger for temperature monitoring applications. The HOBO Pendant Temperature/Alarm Data Logger has one channel and is recommended for short-term shipping or long-term monitoring. This data logger features a visible LED light indicator that warns users when preset parameters have been exceeded. This model stores approximately 52K of 10-bit temperature readings. For accurate temperature measurement in sunlight, a solar radiation shield is required (assembly-required RS1 Solar Radiation Shield or pre-assembled M-RSA Solar Radiation Shield).

Optical interface for transfer


  • 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


Measurement range: -20° to 70°C (-4° to 158°F)
Alarms: High and low alarms can be configured for total amount of contiguous or non-contiguous time outside of user-defined limits between -20° and 70°C (-4° to 158°F)
Accuracy: ± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F), see Plot A in manual
Resolution: 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: deployments in extremely cold or hot temperatures, or logging intervals faster than one minute, may significantly reduce battery life
Battery Type: CR2032

UA-001-08: 8K bytes (approximately 6.5K sample and event readings)
UA-001-64: 64K bytes (approximately 52K sample and event readings)

Materials: Polypropylene case; stainless steel screws; Buna-N o-ring
Weight: 15.0 g (0.53 oz)
Dimensions: 5.8 x 3.3 x 2.3 (centimeters) and 2.3 x 1.3 x 0.9 (inches)
Environmental Rating: IP68; not rated for use in direct sun

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

Compatible items

Compliance Certificates

$29.00 USD

Data Offload - Base Stations - Shuttles - Couplers

$14.00 USD

NIST Setup & Certifications

Solar Radiation Shields

$140.00 USD
$100.00 USD


$13.00 USD

Case Replacement Kit

$25.00 USD


$13.00 USD

Data Offload - Base Stations - Shuttles - Couplers

$150.00 USD
$299.00 USD

Graphing & Analysis

$75.00 USD
$99.00 USD

What's in the box

  • HOBO UA-001-64 Pendant Temperature/Alarm (Waterproof) 64K Data Logger


HOBO Pendant Temperature Data Logger (UA-001-08, UA-001-64) User's Manual

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HOBO® Pendant® Data Logger (UA-00x) Quick Start

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