Watermark Monitor Data Logger. Read Soil Moisture Automatically.

Watermark Monitor Data Logger. Read Soil Moisture Automatically.
  • Monitor with Sensors
IRR 900M
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The Watermark Monitor is the standard wired version of our data logger providing users with a reliable, simple, and effective means of collecting information. 

WATERMARK Monitor Features: 

  • Automatically reads sensors at a selectable interval
  • 8 sensor capacity, can read:
  • WATERMARK Soil Moisture Sensors
  • Temperature Sensors
  • Tipping Bucket Rain Gauges (with 900M-RGA adapter)
  • IRROMETER Tensiometers (with RSU)
  • On/Off switch states
  • 4-20 mA
  • 0-5 V
  • Temperature compensation
  • WaterGraph Software included (MS Windows only)
  • In-field display of current reading
  • Download history to a computer
  • Outdoor mount
  • 9 Volt battery included
  • Complete with 8 sensors (1 Temperature & 7 WATERMARKs)


The WATERMARK Monitor is user programmed for the individual characteristics of the site to be monitored: 

  • A unique location name
  • The time interval to automatically take readings, from once every minute to once every day
  • A unique name for each sensor being read
  • The date and time you want readings to begin
  • The selection of sensor type for each input port

Stored readings are downloaded to a computer for display. Other display options are available. The software, included with the WATERMARK Monitor, is used to set up your individual site profile, launch the data-logger, download recorded history and graphically display the results. The data file created can also be opened by some spreadsheet or graphing programs, like Microsoft Excel®.


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