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Artikelbeschreibung
Technische Daten
Datenblatt
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 Onset’s 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 Onset’s cloud-based HOBOlink 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)
- Measurement Range*
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0.00 to 0.64 m³/m³ in mineral soils0.00 to 0.70 m³/m³ in soilless media
- Accuracy
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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
- Resolution
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0.001 m³/m³
- Dielectric Measurement Frequency
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70 MHz
Temperature Sensor (MX2307)
- Range
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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
- Accuracy
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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
- Resolution
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0.04°C0.072°F
- Drift
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<0.01°C per year0.018°F per year
- Response Time
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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
Logger
- Operating Range
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-25° to 60°C-13° to 140°F
- Radio Power
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1 mW0 dBm
- Transmission Range
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Approximately 30.5 m (100 ft) line-of-sight
- Wireless Data Standard
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Bluetooth Low Energy (Bluetooth Smart)
- Logging Rate
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1 second to 18 hours
- Logging Modes
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Fixed interval (normal, statistics) or burst
- Memory Modes
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Wrap when full or stop when full
- Start Modes
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Immediate, push button, date & time, or next interval
- Stop Modes
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When memory full, push button, date & time, or after a set logging period
- Time Accuracy
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±1 minute per month 0° to 50°C (32° to 122°F)
- Battery Type
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2/3 AA 3.6 Volt lithium, user replaceable
- Battery Life
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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.
- Memory
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110,000 measurements, maximum (472 kB)
- Full Memory Download Time
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Approximately 60 seconds; may take longer the further the device is from the logger
- Dimensions
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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)
- Weight
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MX2306: 229 g (80 oz)MX2307: 267 g (94 oz)
- Materials
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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)
- Environmental Rating
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Temperature sensor and cable (MX2307): Immersion in water up to 50°C (122°F) for 1 year
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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