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Part Numbers
MX2306
•MX2307
HOBO MX Soil Moisture and Temperature Data Logger
Bluetooth Wireless-Enabled Loggers
From $399.00 USD
Low-cost, fully integrated soil moisture loggers with convenient Bluetooth wireless data offload.
Important Information
Requires a compatible mobile device or Windows computer and the HOBOconnect app. System requirements for app can be found at bottom of HOBOconnect software page.
Compatible with
Overview
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 soil moisture 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 the 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. For indoor areas, such as greenhouses, users can add the MX Gateway and MX Data Plan for remote access to data with LI-COR Cloud® software.
Features
- 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
Specifications
Soil Moisture: Volumetric Water Content (VWC)
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0.00 to 0.64 m³/m³ in mineral soils0.00 to 0.70 m³/m³ in soilless media
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±0.031 m³/m³ typical in mineral soils that have solution EC <8 dS/m±0.051 m³/m³ typical in soilless media
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0.001 m³/m³
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70 MHz
Measurement Range*
Accuracy
Resolution
Dielectric Measurement Frequency
Temperature Sensor (MX2307)
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-40 to 100°C (-40 to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year
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±0.25°C from -40 to 0°C±0.45 from -40 to 32°F±0.2°C from 0 to 70°C±0.36 from 32 to 158°F±0.25°C from 70 to 100°C±0.45 from 158 to 212°F
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0.04°C0.072°F
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<0.01°C per year0.018°F per year
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3 minutes in air moving 1 m/s; 20 seconds in stirred water4 minutes in air moving 1 m/s with RS3-B Solar Radiation Shield
Range
Accuracy
Resolution
Drift
Response Time
Logger
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-25° to 60°C-13° to 140°F
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1 mW0 dBm
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Approximately 30.5 m (100 ft) line-of-sight
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Bluetooth Low Energy (Bluetooth Smart)
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1 second to 18 hours
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Fixed interval (normal, statistics) or burst
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Wrap when full or stop when full
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Immediate, push button, date & time, or next interval
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When memory full, push button, date & time, or after a set logging period
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±1 minute per month 0° to 50°C (32° to 122°F)
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2/3 AA 3.6 Volt lithium, user replaceable
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2 years, typical with logging interval of 1 minute and Bluetooth Always On enabled; 5 years, typical with logging interval of 1 minute and Bluetooth Always On disabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.
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110,000 measurements, maximum (472 kB)
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Approximately 60 seconds; may take longer the further the device is from the logger
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Logger housing: 10.8 x 5.08 x 2.24 cm4.25 x 2.0 x 0.88 in.Soil moisture sensor: 7.5 x 5.1 x 2.4 cm2.95 x 2.02 x 0.95 inchesSoil moisture sensor needle length: 5.4 cm (2.13 inches)Soil moisture sensor needle diameter: 0.32 cm (0.13 inches)Temperature sensor (MX2307) diameter: 0.53 cm (0.21 in.)Sensor cable length: 2 m (6.56 ft)
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MX2306: 229 g (80 oz)MX2307: 267 g (94 oz)
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Logger: Acetal, silicone gasket, stainless steel screwsSoil Moisture Sensor: ASA plastic body with polyurethane epoxy filling and stainless steel pinsTemperature Sensor (MX2307): Stainless steel waterproof tipCable: PVC, UV resistant and rodent repellent (soil moisture sensor cable)
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Temperature sensor and cable (MX2307): Immersion in water up to 50°C (122°F) for 1 year
Operating Range
Radio Power
Transmission Range
Wireless Data Standard
Logging Rate
Logging Modes
Memory Modes
Start Modes
Stop Modes
Time Accuracy
Battery Type
Battery Life
Memory
Full Memory Download Time
Dimensions
Weight
Materials
Environmental Rating
Notices
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The sensor data can be post-calibrated if necessary (e.g. the sensor is used in non-mineral soil types or higher than standard accuracy is required). Users can apply a calibration equation to the data exported from the app. The VWC range will depend on the calibration equation.
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Compatible items
Mounting Accessories
NIST Setup & Certifications
Solar Radiation Shields
Communications
Accessories
Batteries
Compliance Certificates
What's in the box
- HOBO MX2306 or HOBO MX2307 Data Logger with 2m cable(s) and attached sensor(s)
- HOBO MX Soil Moisture Logger Quick Start
- Screws
- Cable ties
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Mounting
Solar Radiation Shield
Use the RS3-B Solar Radiation Shield with HOBO external sensors for improved temperature measurement accuracy in locations exposed to sunlight