ONSET HOBO U14-001 LCD - Temperature/Relative Humidity (RH) Data Logger

HOBO U14 data loggers display, record, and provide alarm notifications of temperature and humidity conditions.

  • Product Name:ONSET HOBO U14-001 LCD - Temperature/Relative Humidity (RH) Data Logger
  • Model:U14-001
  • Maunufactor:Onset
  • Country:USA


HOBO U14 data loggers display, record, and provide alarm notifications of temperature and humidity conditions. Receive out-of-range alarms notifications with the optional Auto Dialer or Remote Audible Alarm. These loggers are well-suited for use in manufacturing, processing, and storage environments  where reliable monitoring and documentation of temperature and relative humidity conditions is critical.

Highlighted Features

Faster USB data download time

Improved Temperature/Relative Humidity sensor resolution

Real-time display of Temperature and Relative Humidity

Alarm display and output ensure timely notification of out-of-range conditions

Two models to choose from - internal Temperature/Relative Humidity external Temperature or Temperature/Relative Humidity

Optional Remote Alarm and Autodialer

Optional protective case for wet or condensing environments

Compatible with HOBOware and HOBOware Pro software for logger setup, graphing and analysis

In what environment does this data logger operate?

This data logger operates in an indoor environment.

What measurements does this data logger support?

The U14-001 data logger supports the following measurements: Relative Humidity and Temperature


  • Operating temperature range -20°C to +50°C, (-4°F to +122°F) , 0 to 100% RH non-condensing

  • Operating relative humidity range 0 to 95%, non-condensing, noncorrosive environment

Logger Capabilities

  • Capacity:

        Temp and RH: 21,500 measurements

        Temp Only: 43,000 measurements

  • Software-selectable sampling intervals: 1 second up to 18 hours, recording times up to 1 year

  • Programmable start time/date

  • Recording modes: Stop when full

  • Launch Modes: Immediate, Delayed

  • Nonvolatile EEPROM memory retains data even if batteries fail


  • Size: 33 x 50.8 mm (1.3 x 2 inches)

  • Displays temperature and relative humidity simultaneously

  • Displays °C or °F (selectable within host software)

  • Displays memory remaining and battery level

  • Displays flashing ALERT for out-of-limits conditions (selectable within host software) and stops flashing on offload or return to normal range.


  • High and low set points for both temperature and relative humidity

  • Selectable delays for each set point

  • Alert conditions reset on offload or return to normal range.

  • Selectable Contact Relay: Normally Closed or Normally Open

  • Contact rating: 48VDC, 1A max

  • Contact resistance: less than 1 Ohm

  • Wire size range is 22AWG to 14AWG

  • 0% Low Battery Range Communications

  • Offloads data to PC or U-Shuttle via USB cable

  • Readout full logger (64K) in less than 30 seconds


  • Time accuracy: ±1 minute per month at 20°C (68°F).


  • 3 AAA Alkaline batteries, user-replaceable


  • 125 x 92 x 31 mm (4.9 x 3.6 x 1.2 inches)

  • 170 g (6.0 oz) with batteries

Internal 12-Bit Temperature Sensor

  • Measurement range: -20°C to 50°C (-4°F to 122°F)

  • Accuracy: ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F); ±0.13°C (0.24°F) typical

  • Resolution: 0.02°C @ 25°C (0.04°F @ 77°F)

  • Response time: 15 minutes (to 90% in airflow of 1 m/sec)

  • Temperature Accuracy Drift: Negligible

Internal 12-Bit Relative Humidity Sensor

  • User replaceable

  • Measurement range: 0-100% RH, -20 to 50°C (-4 to 122°F)

  • Accuracy: ±2.5% from 10% to 90% RH typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical

  • Resolution: 0.05% RH

  • Response time to 90%: 2 minutes (to 90% in airflow of 1 m/sec)

  • Accuracy Drift: <1% per year typical

  • Hysteresis: 1% typical

External Sensors

  • For External Sensor Specifications, see the sensor's user manual.

Battery Life

  • The batteries will last one year in typical conditions (logging intervals of ≥ 1 minute with weekly offloads and average temperatures greater than 10°C or 50°F). Frequent offloads and/or extreme temperatures will reduce battery life.

  • At temperatures below freezing (0°C or 32°F), batteries will typically require replacement every six months. In these conditions the battery level bar graph should be checked regularly.