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Watermark Sensor
 These granular matrix sensors have a range of 0 to -200 kPa. They are a good choice when many replicates are
required - as in irrigation monitoring for example. They are more durable in soil than gypsum block sensors.
It is important to note that although the above sensor is inexpensive, the overall cost is increased by the need to include an AC excition current and a device to read the AC output. A suitably specified DL2e Data Logger can perform both functions.
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