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Calibrating ECH2O Soil Moisture Sensors Application Note

Onset adds smart sensor adapters to the ECH2O probes so that they are plug‐and‐play compatible with HOBO® U30 stations and HOBO Micro Stations.

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Soil Monitoring Station with the HOBO Micro Station (H21-002)

This technical note provides a solution for monitoring soil temperature and moisture with the HOBO Micro Station (H21-002).

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Using the pHionics STs pH Sensor with a HOBO RX3000 Station

This application note describes how to connect, calibrate, and operate the pHionics STs pH sensor with the HOBO RX3000 station.

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An alarm was tripped on my MX logger. How do I clear it?

Visual alarms are cleared based on the settings selected under “Maintain Visual Alarms Until” when configuring the logger.

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MX logger is listed in the wrong group. How can I change that?

  • Connect to the logger, tap Configure, and then tap Group.
  • Select a group for the logger or create a new group.
  • If you do not want the logger to be listed in any group, th
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Judd Communications Snow Depth Sensor with the U30 Remote Monitoring Station

Check out the attached PDF to find out how to use the Judd Communications Snow-Depth Sensor with the HOBO® U30 Station.

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Stainless steel loggers and salt water

Following is an important application note regarding the deployment of the following products: U20-001-01 – HOBO Water Level Logger U12-015 – HOBO U12 Stainless Steel Temp Logger U12-015-02 – HOBO U12 Stainless Steel Temp Logger with 5” probe
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Installing Onset soil moisture sensors

Use the attached guide as a reference when deploying soil moisture Smart Sensors.
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U12 input impedance

This note looks at input impedance characteristics of the HOBO U12 loggers with external inputs. "Rs" and "VA" in the attached diagram represent your source impedance.

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Verifying RH accuracy on HOBO data loggers

Testing the accuracy of relative humidity sensors requires carefully-controlled conditions and a considerable amount of time. Please see the white paper Testing the Accuracy of Sensirion Relative Humidity Sensors in HOBO Data Loggers for complete details on the recommended procedure to follow.
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