AgTech: Wireless Soil Water Sensor by Campbell Scientific

Campbell Scientific introduces various soil water sensors for improved farming technology. The CWS655 is a wireless version of soil water reflect meter. It has 12 cm rods and monitors soil volumetric water content, bulk electrical conductivity, and temperature. This reflect meter has an internal 900 MHz spread-spectrum radio that transmits data to a CWB100 Wireless Base Station or to another wireless sensor. The internal radio's frequency is commonly used in the US and Canada.

Benefits and Features
- Versatile sensor—measures dielectric permittivity, bulk electrical conductivity (EC), and soil temperature
- Measurement corrected for effects of soil texture and electrical conductivity
- Internal frequency-hopping, spread spectrum radio provides longer range and less interference
- Battery powered
- A reliable, low maintenance, low power method for making measurements in applications where cabled sensors are impractical or otherwise undesirable
- Transmissions can be routed through up to three other wireless sensors
- Compatible with CR800, CR850, CR1000, and CR3000 data loggers

Specifications
- Weather Resistance: IP67 rating for sensor and battery pack (battery pack must be properly installed); each sensor is leak tested
- Operating Temperature Range: -25° to +50°C
- Operating Relative Humidity Range: 0 to 100%
- Power: 2 AA batteries with a battery life of 1 year assuming sensor samples taken every 10 minutes. Optional solar charging available
- Average Current Drain: 300 μA with 15 minute polling
- Rod Length: 12 cm (4.7 in.)
- Rod Diameter: 3.2 mm (0.13 in)
- Weight: 216 g (7.6 oz)

Source : https://www.campbellsci.com/