- Model HH2 - Moisture Meter - Readout Unit

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The Moisture Meter type HH2 is a versatile readout unit for use with Delta-T Devices soil moisture sensors: the Profile Probe, ThetaProbe, SM300, SM150 and WET Sensor. The HH2 readout unit offers impressive functionality in a compact, hand-held unit, designed for field use. Readings are displayed on the LCD and can be stored to memory for later download to a PC.

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  • Immediate display of water content
  • Reads ML3, SM300, SM150, PR2 or WET sensor
  • Stores up to 1500 time-stamped readings

The unit can be operated with one hand, for convenience in the field. Each time-stamped reading includes a unique sample number, a plot identification number (A to Z), and a sensor location number (1 to 255).

Data is transferred to a PC using the RS-232 cable provided with each unit. The HH2Read Windows PC software provides a data import wizard for direct download into Excel or other PC spreadsheet packages, or into irrigation scheduling programs. Alternatively, data can be downloaded in comma-separated ASCII data file (.CSV) format.

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  • Input connections: 1 water content sensor or 1 WET Sensor
  • Control outputs
  • Readings stored: 1,500
  • Recording rate
  • Configuration: By keypad
  • Communication options: RS232 / USB [1]
  • Sensor excitation: 1 switched battery
  • Power: 1 9V 6LR61 (PP3)alkaline
  • Battery life (dependent on usage): ~ 5,000 readings
  • Enclosure rating: IP54
  • Temperature range: 0 to +40°C
  • Display: 2 line x 16 character
  • Size: 125 x 80 x 45mm
  • Typical applications: Instantaneous reading of soil moisture / profiles/ WET Sensor

Sensor compatibility (maximum number of sensors that could be connected [2]

  • ML3: without temp
  • SM300: without temp
  • SM150:
  • PR2:
  • PR2 SDI-12
  • WET Sensor:
  • EQ3: (mV only)
  • Temperature
  • Tensiometers
  • Counters or Events
  • Relay Output

[1] With USB to RS232 Adapter Cable type USB-RS232
[2] With appropriate expansion cards and power supply arrangements

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