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Part Number -
MX2307A
HOBO MX Soil EC/VWC/Temp Data Logger
Bluetooth Wireless-Enabled Logger
From $495.00 USD
Integrated wireless data logger that externally measures EC, VWC, and temperature, with an additional internal temperature/sensor for monitoring climate and soil conditions simultaneously.
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
Ideal for researchers and growers looking for the accurate data to complete their plant growth picture, this Bluetooth-enabled, fully integrated logger delivers high precision measurements for soil moisture/electrical conductivity (EC), volumetric water content (VWC), and temperature with an external sensor, as well as temperature/relative humidity with an internal sensor. An upgrade from the cost-effective MX2306 and MX2307, this all-in-one solution tracks soil, plant, and atmospheric conditions simultaneously to assess growing conditions, improve crop yields, reduce harmful runoff, and protect ecosystems.
Connected to a mobile phone, tablet, or Windows laptop running the free HOBOconnect app, the logger features convenient Bluetooth wireless setup and data download 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
Temperature Sensor
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-40 to 70°C (-40 to 158°F)
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±0.2 °C (typical) within -40 to 70 °C
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0.008°C (.014 °F)
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<0.01°C (0.018°F) per year
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17 minutes in air moving 1 m/sec
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24 minutes in air moving 1 m/sec
Range
Accuracy
Resolution
Drift
Response Time* Without Solar Radiation Shield
Response Time* With Solar Radiation Shield
Relative Humidity (RH) Sensor
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0 to 100% RH, -40° to 70 °C exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
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±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
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0.01% RH
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<1% per year typical
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30 seconds in air moving 1 m/sec
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40 seconds in air moving 1 m/sec
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Vapor Pressure Deficit (VPD) in kPa, and Dew Point (computed from logged data)
Range
Accuracy
Resolution
Drift
Response Time* Without Solar Radiation Shield
Response Time* With Solar Radiation Shield
Calculated Metrics
Soil Moisture: Volumetric Water Content (VWC)
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0.00 to 1.0 m³/m³ VWC in mineral soils
0.00 to 1.0 m³/m³ VWC in soilless media
Apparent Dielectric Permittivity: 1 (air) to 80 (water) -
±0.03 m³/m³ typical
±0.06 m³/m³ maximum
Apparent Dielectric Permittivity: ±1 Ɛa -
0.001 m³/m³
Apparent Dielectric Permittivity: 0.002 Ɛa -
70 MHz
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1400 ml
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Range: 0 to 200%
Resolution: 0.1%
Measurement Range (select one at configuration)****
Accuracy
Resolution
Dielectric Measurement Frequency
Volume of Influence
Percent of Field Capacity (for VWC measurements only)
Soil Temperature*****
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-40 to 70°C (-40 to 158°F)
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±0.5°C from -40° to -20°C
±0.3°C from -20°C to 70°C -
0.1°C (0.18°F)
Measurement Range
Accuracy
Resolution
Soil Bulk Electrical Conductivity (EC)
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0 to 20000 µS cm-1
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±5 % from 0 to 10000 µS cm-1
±8 % from 10000 to 20000 µS cm-1 -
1 µS cm-1
Measurement Range
Accuracy
Resolution
Logger
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-40 to 70°C (-40 to 158°F)
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1mW (0 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 is 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; 4 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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195,000 measurements, maximum
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Approximately 4-5 minutes; 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 cm (4.25 x 2.0 x 0.88 in.)
Soil moisture sensor (only): 4.6 × 4.6 × 10.9 cm (1.81 × 1.81 × 4.31 in)
Soil moisture sensor needle length: 5.4 cm (2.14 in)
Soil moisture sensor needle diameter: 0.40 cm (0.16 in)
Sensor cable length: 2 m (6.56 ft) -
263 g9.3 oz
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417 g14.7 oz
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Acetal, silicone gasket, stainless steel screws
Soil Moisture Sensor: ASA plastic body with polyurethane epoxy filling and stainless-steel pins
Cable: PVC, UV resistant and rodent repellent (soil moisture sensor cable) -
Logger: NEMA 6 and IP67
Soil Moisture sensor and cable: xxxx
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 (Unpackaged)
Weight (Packaged)
Materials
Environmental Rating
* Typical, up to 90% of change
** Per RH sensor manufacturer data sheet
*** Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Absolute uncertainty under these conditions is ± 3% typical; ± 5% maximum.
**** 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 HOBOlink. The VWC range will depend on the calibration equation.
***** For additional accuracy, the sensor data can be post-calibrated for a particular soil by applying a calibration equation to the data exported from the app.
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Compatible items
Software
Wireless Communications
Mounting Accessories
Solar Radiation Shields
NIST Setup & Certifications
Accessories
Batteries
What's in the box
- HOBO MX2307A 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
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