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HOBO MX2309 Wireless Temperature, Humidity, Solar Data Logger - Optional Remote Monitoring

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SKU
MX2309
£744.95 £620.79

Measures Temperature, RH & Solar Radiation with LI-COR 200R Pyranometer

Research-grade, multiparameter microclimate monitoring solution with effortless Bluetooth data offload that continuously measures global solar radiation, temperature, and humidity. Ideal for agricultural, environmental research, ecology, and energy applications.

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The MX2309 pairs research-grade sensing with wireless convenience, integrating the renowned LI-COR LI-200R pyranometer that delivers solar radiation measurements with scientific-grade accuracy (calibration uncertainty of ±3% typical).

This all-in-one device captures a comprehensive climate picture, combining an external LI-200R pyranometer (measuring total solar irradiance in the 400–1100 nm range) and built-in temperature and relative humidity sensors. This enables the calculation of critical metrics such as Accumulated Solar Radiation (MJ/ m²), Daily Light Integral (DLI of Solar, MJ/m²/day), Vapor Pressure Deficit (VPD, kPa), and Dew Point. Providing laboratory-quality measurements of solar climate conditions in an affordable, mobile logger, the rugged, battery-powered MX2309 is easily deployed and expands monitoring capabilities to an even broader range of environmental and energy applications. 

Users can mount the sensor in the field, and setup and data retrieval are seamlessly simple—no cables or additional download devices needed using the free HOBOconnect app on your phone or tablet. Effortlessly configure the logger and download data via Bluetooth (up to a 100 ft range), which allows you to deploy in and download data from hard-to-reach spots.

Expand your remote monitoring by adding an MX Data Plan, which allows you to upload data to LI-COR Cloud remote software for further analysis, sharing, and more. 

Key Features

Integrated Temp & RH Monitoring - Logged temperature and humidity alongside solar radiation for a complete view of environmental conditions

Wireless Bluetooth Data Offload - Fast, easy logger setup and download via phone or tablet (up to ~100 ft range).

Rugged, Weatherproof Design - Durable IP67/NEMA 6 housing stands up to humid, wet, and dusty environments found in greenhouses, growth chambers, or outdoor field sites.

Long Battery Life & Memory - User-replaceable battery lasts up to ~2+ years and ample data storage supports extended deployments.

Alarms and Alerts - See out-of-range conditions with logger's LED readout, and configure threshold alerts using HOBOconnect for proactive monitoring.

Easy Deployment - Users can deploy the logger in minutes, configure logging intervals via the HOBOconnect app, and wirelessly retrieve data (without a laptop) in the field!

Requires a compatible mobile device or Windows computer and the HOBOconnect app.

Access your data directly from your mobile phone, tablet, or Windows computer when within 100 foot line-of-sight range of the logger - with the free HOBOconnect app.

To enable cloud data storage and analysis - add an MX Data Plan (select from options above).

To enable near real-time remote monitoring and alerts via email/text message - add an MX Data Plan and MX Gateway (select options above). Note: The MX Gateway must be indoors.

You can download the HOBOconnect app here

   Download for Windows

More Information
Country of Manufacture United States
Brand HOBO
Measurements Dew Point, Humidity, Solar Radiation, Temperature
Typical applications Environmental (Outdoor), Field Research, Weather Monitoring
HOBO Product Series MX2300
Explanation

Specifications

Temperature Sensor

Range
-40 to 65 °C (-40 to 149 °F)
Accuracy
±0.2 °C (typical) within -40 to 65 °C
Resolution
0.008°C (.014 °F)
Drift
<0.01°C (0.018°F) per year

Relative Humidity (RH) Sensor

Range
0 to 100% RH, -40° to 65 °C (-40° to 149 °F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
Accuracy
±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
Resolution
0.01% RH
Drift
<1% per year typical

Global Solar Radiation Sensor

Range
0 to ~1280 W/m² (full sunlight)
Accuracy
±3% typical, ± 5% maximum (LI-200R Absolute Calibration:)*
Offset
± 0.5 W/m²
 
Resolution
0.05 W/m²
Spectral Range
400–1100 nm
Linearity
Maximum deviation of 1% up to 3,000 W m-2
Stability
<= 2% change over one year
Temperature Dependence
±0.15% per ˚C maximum
Cosine Correction
Cosine corrected up to 82˚ angle of incidence
Azimuth
<±1% error over 360˚ at 45˚ elevation
Tilt
No error induced from orientation
Detector
High stability silicon photovoltaic detector (blue enhanced)
Sensor Housing
Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware. O-ring seal on the sensor base.
Sensor Size
2.36 cm diameter x 3.63 cm (095” x 1.43”)
Cable Length
1.8 m

Calculated Metrics

Accumulated Solar Radiation in MJ/m², Daily Light Integral (DLI) of Solar in MJ/m²/day, Vapor Pressure Deficit (VPD) in kPa, and Dew Point
 

Response Time (typical, to 90% of charge)

Temperature
Without Solar Radiation Shield: 17 minutes in air moving 1 m/sec
With RS1 Solar Radiation Shield: 24 minutes in air moving 1 m/sec
Relative Humidity (RH)
Without Solar Radiation Shield: 30 seconds in air moving 1 m/sec
With RS1 Solar Radiation Shield: 40 seconds in air moving 1 m/sec

Logger

Operating Range
-40 to 65 °C (-40 to 149 °F)
Radio Power
0.4mW (-4 dBm)
Transmission Range
Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard
Bluetooth Low Energy (Bluetooth Smart)
Logging Rate
1 second to 18 hours
Logging Modes
Fixed interval (normal, statistics) or burst
Memory Modes
Wrap when full or stop when full
Start Modes
Immediate, push button, date & time, or next interval
Stop Modes
When memory is full, push button, date & time, or after a set logging period
Time Accuracy
±1 minute per month 0° to 50°C (32° to 122°F)
Battery Type
2/3 AA 3.6 Volt lithium, user replaceable
Battery Life
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 c
Memory
195,000 measurements, maximum
Full Memory Download Time
Approximately 4-5 minutes; may take longer the further the device is from the logger
Dimensions
Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.)
LI-190R: 2.36 cm diameter × 3.63 cm (0.93 × 1.43 in.)
Weight
Logger: 149 g (5.26 oz)
Materials
Acetal, silicone gasket, stainless steel screws
Environmental Rating
NEMA 6 and IP67

*: Calibrated against an Eppley Precision Spectral Pyranometer (PSP) under natural daylight conditions. Absolute uncertainty under these conditions is ± 3% typical; ± 5% maximum

Batteries 2/3 AA 3.6 Volt lithium (included). User-replaceable.
Power Battery only

Standard delivery (Royal Mail) - £3.95 to £4.99

Available for purchases under £200. Your order should be with you within 4-5 working days.

 

Tracked delivery - £5.95 to £6.50

Our tracked delivery is either Royal Mail tracked, Parcelforce or UPS. Your order should be with you within 1-2 working days.

 

Next Day service - £9.95

Place your order before 2:30pm Monday - Friday and receive your order the next working day (excludes Saturdays, Sundays and Public holidays). Orders placed at the weekend are shipped on the next working day and usually arrive the following day. Goods shipped on a next working day service may be subject to delays by the courier which are outside of our control. Services to outlying areas may differ and take longer and enhanced services may not be available.

 

International delivery

International delivery is available for this product. The cost and delivery time depend on country.

 

Collection

You can collect from our warehouse. Please call before visiting to ensure we have your order ready.

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