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My graph is blank. What happened?

Viewing the graph of a full data file or adding more sensors to the view of a graph (through the sensor selector) may occasionally draw a blank graph.

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ACT Evaluation Report on the HOBO U26 DO Logger

The HOBO U26 Dissolved Oxygen logger has been part of a multi-year evaluation of DO loggers and sensors by the Alliance for Coastal Technologies (ACT), and the results have just been published onli

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Wiring Diagram - Monitoring Differential Air Pressure with an RX3000

Attached is a diagram that shows how to connect and configure a Veris Differential Air Pressure Sensor (T-VER-PX-Series) with an RX3000 Station.

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Sample Data - Monitoring Remote Water Level, Rainfall and Specific Conductance in a Drainage Pond

Attached is a screen-capture from our HOBOlink web product that displays measurements made with a HOBO RX3000 station that's monitoring (among other things) rainfall, water level (Stevens vented wa

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Improve Spray Timing and Reduce Risk with NEWA and Weather Data

Learn how to use NEWA's IPM Tools and real-time weather data to make timely spray decisions from UMASS Extension expert Jon Clements and Matt Sharp from HOBO.
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Wiring Diagram - Monitoring 480V, 3-Phase AC Voltage and Current with a HOBO H22-001 Energy Logger

Attached is a wiring diagram that shows how to use CTs and PTs with the HOBO H22-001 Energy Logger via the S-FS-TRMSA Module. The image shows a 480 V, 3-phase application.

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Wiring Diagram - Monitoring Energy with a UX120-017 and T-VER-E50B2

Attached is a diagram that shows you how to use a T-VER-E50B2 Power and Energy Meter and UX120-017 data logger to monitor energy in a 3-phase circuit.

Warning:

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How do I add or remove series or events from the graph?

Tap the menu icon at the top of the graph and then enable or disable the sensors, statistics, and events you wish to show or hide on the graph. Tap the menu icon again when you are done.

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Maximum sensor cable length

The entire network (all sensors combined) cannot exceed 100 meters. As long as your total cable length is below this, it does not matter how you designate the individual cable lengths. It is important to insure that the connections are weatherproof.
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Using a Water Level Data Logger to Determine Stream Flow

Water level data loggers are commonly used to determine stream flow over time and "peak discharge"
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