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Weatherproof Data Loggers for Outdoor Use
For more than two decades, our HOBO weatherproof data loggers have set the standard for reliable and accurate data logging outdoors. From agricultural research to ecology studies, our weatherproof data loggers offer unparalleled ease-of-use and deliver exceptional reliability – even in the harshest outdoor environments.
Temperature and Relative Humidity Outdoors
HOBO MX2300
The MX2300 series data loggers are used outdoors to measure temperature or temperature and relative humidity. They are Bluetooth Smart (BLE) - capable and work with the free HOBOconnect App for iOS or Android. The operation is a breeze - configure and manage your data directly from your phone or tablet! HOBO MX2300 data loggers provide a range of up to 30 m, enabling easy downloading of data from loggers in hard-to-reach locations. An accuracy of 0.2 °C ensures reliable and correct data at all times.- Compact, weatherproof housing with mounting bracket
- Models with internal and external sensors available
- Wireless configuration and download via Bluetooth
- Easily forward data to your mobile device
- Compatible with the MX Gateway for web-based real-time monitoring
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Models and Documentations
Models and Measurement Ranges
MX2301 Temperature/Humidity Logger (-40 °C to +70 °C) MX2302 with 1 external Temperature/Humidity sensor (-40 °C to +70 °C) MX2303 with 2 external Temperature sensors (-40 °C to +100 °C) MX2304 with 1 external Temperature sensor (-40 °C to +100 °C) MX2305 Temperature Logger (-40 °C to +70 °C) Measurement range humidity sensor 0 to 100 %RH at -40 °C to 70 °C; at ambient conditions below -20 °C or over 95 %RH, the RH sensor can register a maximum deviation of up to 1%.
Documentation and videos




Weatherproof Data Loggers
HOBO U23 Pro v2
The HOBO Pro v2 Temperature / Relative Humidity weatherproof data logger is an outdoor data logger for use in harsh or condensing environments.Please note: An interface is required for configuration and reporting.
- Weatherproof housing for use in outdoor or condensing environments
- High accuracy and reliability
- Replaceable relative humidity sensor provides fast response and superior recovery from condensing conditions
- Small-diameter external sensor versions for measurements in tight spaces
- Optic USB interface for fast and reliable download
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Models, Accessories and Documentations
Models
U23-001 Temperature & Relative Humidity U23-002 Temperature & Relative Humidity with external probe U23-003 Temperature with two external probes U23-004 Temperature with external probe
Technical Specifications
Monitoring Parameters Temperature & Humidity Measurement Range -40 °C to +70 °C, 0 to 100 %RH Environment Indoors and outdoors Battery life 3 years with typical use
user-replaceable ½ AA lithium batterySystem Requirements
- HOBOware Software (click here for your free software download)
- Optic USB Base station (for HOBO loggers with optic USB interface such as Pendant®, U22, and TidbiT)
- Communication device (PC, laptop)
Universal Optic Base station - BASE-U-4
The Universal Optic USB Base Station and couplers are used to offload data from any HOBO® data logger with an Optic USB interface. The splash-resistant Optic USB Base Station connects to your computer via USB, while connecting to the data logger via an appropriate coupler. The base station is compatible with the HOBO UA, U20, U22, U23, UTBI, U24 & U26 series.
HOBO Waterproof Shuttle- HOBO U-DTW-1
The HOBO Waterproof Shuttle provides convenient readout and relaunching of underwater and outdoor HOBO data loggers with an Optic USB interface, and is waterproof to 20m. The HOBO Waterproof Shuttle can also be used as a base station.
Note 1: Couplers are included for compatibility with our U-series loggers with optical communication, including the UA Pendants, U20 water level, U22 Water Temp Pro, UTBI TidbiT, U23 Pro Temp/RH, U24 Conductivity and U26 DO data loggers.
Note 2: HOBOware Pro is required when using the U-DTW-1 Waterproof shuttle.
Documentations
Users Guide Replacement Battery
Users Guide growing degree days
Low-cost, fully integrated soil moisture loggers with Bluetooth wireless data offload. Available in two models – one that measures soil moisture (HOBO MX2306) and one that measures both soilmoisture and temperature (HOBO MX2307) – these loggers are ideal for researchers and growers looking for the accurate data they need to save water, improve crop yields, reduce harmful runoff, and protect ecosystems.
With just a mobile phone, tablet, or Windows laptop running free HOBOconnect app, users get convenient wireless setup and data download via Bluetooth when within 100 feet of the logger – making it easy to retrieve data from hard-to-access field locations. And for indoor areas, such as greenhouses, users can
add the MX Gateway for remote access to data in cloudbased HOBOlink software.
- Ready to deploy, with pre-attached sensors
- Easy configuration and data offload with the free HOBOconnect app
- Durable TEROS 10 soil moisture sensor lasts over 10 years in the field
- For use in both mineral soils and soilless media
- Sturdy, sharp stainless-steel spikes for easy installation and better soil contact
- Option to view data in Percent of Field Capacity
- Compatible with the MX Gateway for web-based real-time monitoring
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Models and Documentations
Modelle und Messbereiche
MX2306 with external TEROS 10 soil moisture sensor MX2307 with external Temperature and TEROS 10 soil moisture sensor
Documentations and Videos
Quick Start Guide HOBO MX2306/2307