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

SKU: UA-001-64


A miniature, waterproof one-channel temperature data logger, this model is value-priced for short-term shipping applications or long-term deployment. Data logger alarm LEDs flash if temperatures have exceeded user-set levels and delay options, and provide visible verification that temperatures have been within the desired range throughout deployment. This 64K model stores approximately 52K of 10-bit temperature readings. For accurate temperature measurement in sunlight a solar radiation shield is required (RS1 Solar Radiation Shield, assembly required; M-RSA pre-assembled Solar Radiation Shield).

Highlighted Features

  • 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

In what environment does this data logger operate?

This data logger operates in indoor, outdoor and underwater environments.

What measurements does this data logger support?

The UA-001-64 data logger supports the following measurements: Temperature and Water Temperature

Measurement range

-20° to 70°C (-4° to 158°F)


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)


± 0.53°C from 0° to 50°C (± 0.95°F from 32° to 122°F),


Temperature: 0.14°C at 25°C (0.25°F at 77°F)


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)

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)

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-001-64 : 64K bytes (approximately 52K sample and event readings)


Polypropylene case; stainless steel screws; Buna-N o-ring


15.0 g (0.53 oz)


5.8 x 3.3 x 2.3 (centimeters) and 2.3 x 1.3 x 0.9 (inches)

Environmental Rating


Pendant UA-001-64 Data Sheet


Pendant logger Data Sheet


Pendant UA-001-xx Manual


Pendant UA-xxx Quick Start Guide