Temperature & Humidity Loggers

These loggers are manufactured by Onset Computer Corporation, also known as HOBO Loggers.

MX1100 Series Indoor Loggers

Temperature & Relative Humidity Loggers

HOBO MX2300 Series Loggers

The HOBOMX2300 loggers are weatherproof loggers that provide high accuracy Temperature and Relative Humidity measurements via Bluetooth connection using the free HOBOmobile app.

  • Convenient wireless setup and download via Bluetooth Low Energy (100-foot range)
  • Retrieve data in hard-to-reach locations
  • Visual alarms alert you to out-of-range conditions
  • Compact, weatherproof housing with built-in mounting
  • View current data in real time with Onset’s free HOBOmobile app

MX2301MX2301A Temperature/RH Logger

MX2302A EXT Temperature/RH Logger

MX2303MX2303 Two External Temperature Sensors Logger

MX2304MX2304 Ext Temperature Sensor Logger

MX2305 Temp LoggerMX2005 Temperature Logger

MX2300 Brochure
MX2302A Brochure

HOBO Pro v2 Loggers

The HOBO Pro v2 data loggers are weatherproof loggers that provide high accuracy Temperature and Relative Humidity measurements in a wide range of outdoor environments.

  • High-accuracy measurements
  • Small-diameter, external sensor for measuring in tight spaces (U23-002, U23-003, U23-004)
  • Weatherproof housing for use in outdoor or condensing environments
  • Replaceable RH sensor provides superior recovery from condensing conditions
  • Optic USB interface for fast and reliable download
2x External Temp

(U23-003)

HOBO U23-003 2x External Temp logger

-40 to 100 C (-40 to 212 F)

Cable Length (x2): 184 cm (6ft)

Battery Life: 3 years (typical)

Internal & External Temp

(U23-004)

Internal: -40° to 70° C (-40° to 158° F)

External: -40° to 100° C (-40° to 212° F)

Cable Length: 184 cm (6ft)

Battery Life: 3 years (typical)

Internal Temp/RH

(U23-001A)

HOBO U23-001 Temp/RH logger

-40° to 70° C (-40° to 158° F)

Battery Life: 3 years (typical)

External Temp/RH

(U23-002A)

-40° to 70° C (-40° to 158° F)

Cable Length: 184 cm (6ft)

Battery Life: 3 years (typical)

Base-U-4 or U-DTW-1 is required with this logger.

U23 data offload diagram

U23 Brochure

Pendant Loggers

HOBO pendant temperature loggerHOBO Pendant Loggers

The Pendant logger is a low-cost, weatherproof and waterproof temperature data logger that is designed for short or long-term monitoring applications. These loggers will record the temperature and allow you to download a file to your computer for further review and analysis. They communicate using USB through an infrared pendant base station (standard base station and waterproof shuttle are also compatible). There are also data shuttles that allow you to collect data in the field without a laptop.

The UA-002 models also record light intensity.

Pendant Brochure

There are a variety of models available:

hobo-pendant-temperature-alarm-data-logger-64k-ua-001-64_100 hobo-pendantsup-sup-temperature-light-data-logger-64k-ua-002-64_100 hobo-pendantsup-sup-event-data-logger-ua-003-64_100
UA-001-08 UA-001-64 UA-002-08 UA-002-64 UA-003-64
8k Memory 64k Memory 8k Memory 64k Memory 64k Memory
Temperature Temperature/Light Temp/Event
-4° to 158° F Air
-4° to 122° F Water
— 0-30k footcandles —
1 yr battery