HOBO 8K Pendant® Temperature/Alarm (Waterproof) Data Logger

SKU: UA-001-08


This value-priced data logger is both miniature and waterproof, making it a sensible monitoring solution for specific temperaturemonitoring 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, which warns users when preset parameters have been exceeded. This model stores 6.5K of 10-bit temperature readings. Use a solar radiation shield for accurate temperature measurement in sunlight applications. See RS1 Solar Radiation Shield (assembly required) and 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-001-08 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-001-08 : 8K bytes (approximately 6.5K sample and event readings)
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-001-08 Data Sheet


Pendant logger Data Sheet


Pendant UA-001-xx Manual


Pendant UA-xxx Quick Start Guide