DAVIS Wireless Leaf & Soil Moisture/Temperature Station
The Wireless Leaf & Soil Moisture/Temperature Station for
Vantage Pro2TM monitors up to four temperature-
compensated Soil Moisture Sensors and two Leaf Wetness
Sensors anywhere within the transmission range of your wireless Vantage Pro2 console.
The station communicates directly to your Wireless Vantage Pro2 console/receiver over any one of eight user-selectable ID codes, and has a transmitting range of between 200′ to 1000′ (75 to 300 m) depending upon the environment. The station is solar powered, and includes a battery backup.
The Soil Moisture, Temperature, and Leaf Wetness Sensors are optional and can be ordered to meet the needs of your application.
- Soil Moisture Sensors
The Watermark® Soil Moisture Sensor is an indirect, calibrated method of measuring soil water. It is an electrical resistance type sensor. The Vantage Pro2 weather station converts the electrical resistance reading from the sensor into a calibrated reading of centibars of soil water suction. The Watermark Soil Moisture Sensor is a product of the Irrometer Company, Inc.
- Stainless Steel Temperature Probes with Two-Wire Termination
Multi-purpose temperature probe with 21⁄2 ” (64mm)-long stainless steel housing and a 15′ (4.6 m) direct-burial cable. Use to measure temperature of air, soil, or water. The Temperature Probe is a precision platinum wire thermistor that produces a resistance
change proportional to temperature. The temperature probe is used by the station to provide temperature compensation for the associated soil moisture reading.
- Leaf Wetness Sensors
The Leaf Wetness Sensor detects the presence of surface moisture. The sensor is an artificial-leaf electrical-resistance type. It consists of a sensing grid, low-voltage bi-polar excitation circuit, and conductivity-sensing circuit. The Vantage Pro2 console measures the conductivity across the grid and displays the result as a moisture level, scaled from 0 to 15. The user may select the threshold level at and above which moisture-hour totals are accumulated.
The sensing grid is a gold-plated etched circuit on an epoxy-glass substrate; the excitation and sense circuits are encapsulated in black epoxy. The included mounting bracket holds the sensor at a 45° angle to simulate a typical leaf position and to permit runoff of excess moisture; it may be mounted on a vertical post, pipe, or stake.