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Low-cost, fully integrated soil moisture logger with convenient Bluetooth wireless data offload.
Requires a compatible mobile device or Windows computer running the free HOBOconnect app.
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Low-cost, fully integrated soil moisture loggers with Bluetooth wireless data offload. Available in two models—one measuring soil moisture (HOBO MX2306) and another measuring both soil moisture and temperature (HOBO MX2307)—these loggers are ideal for researchers and growers seeking accurate data to conserve water, improve crop yields, reduce harmful runoff, and protect ecosystems.
Using a mobile phone, tablet, or Windows laptop running the free HOBOconnect app, users benefit from convenient wireless setup and data download via Bluetooth within 100 feet of the logger, making it easy to retrieve data from hard-to-access field locations. For indoor settings such as greenhouses, users can add the MX Gateway and an MX Data Plan for remote data access via LI-COR Cloud® software.
| Property | Value |
|---|---|
| Soil moisture measurement range in mineral soils (sensor data can be post-calibrated if necessary; VWC range depends on calibration equation) | 0.00 to 0.64 m³/m³ |
| Soil moisture measurement range in soilless media (sensor data can be post-calibrated if necessary; VWC range depends on calibration equation) | 0.00 to 0.70 m³/m³ |
| Soil moisture accuracy in mineral soils with solution EC <8 dS/m | ±0.031 typical m³/m³ |
| Soil moisture accuracy in soilless media | ±0.051 typical m³/m³ |
| Soil moisture resolution | 0.001 m³/m³ |
| Dielectric measurement frequency | 70 MHz |
| Logger operating temperature range | -25 to 60 °C (-13 to 140 °F) |
| Radio power | 1 mW (0 dBm) |
| Transmission range (line-of-sight) | approximately 30.5 m (100 ft) |
| 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 full, push button, date & time, or after a set logging period |
| Time accuracy (0° to 50°C / 32° to 122°F) | ±1 minute per month |
| 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 |
| Memory | up to 110,000 measurements (472 kB) |
| Full memory download time | approximately 60 seconds (may take longer the further the device is from the logger) |
| Logger housing dimensions | 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.) |
| Soil moisture sensor dimensions | 7.5 x 5.1 x 2.4 cm (2.95 x 2.02 x 0.95 inches) |
| Soil moisture sensor needle length | 5.4 cm (2.13 inches) |
| Soil moisture sensor needle diameter | 0.32 cm (0.13 inches) |
| Sensor cable length | 2 m (6.56 ft) |
| Weight | 229 g (80 oz) |
| Materials | Logger: 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 |
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