The GEN2 Wireless Soil Moisture Sensor measures soil moisture tension and soil temperature. It uses a resistive granular matrix element to accurately measure the soil's matric water potential (soil moisture tension). It also measures accurate soil temperatures. The sensor takes its measurements based on a user-configurable time interval or Heartbeat. On every Heartbeat, the soil moisture element takes a resistive measurement within a defined and consistent internal matrix material. The sensor also uses a temperature element on the end of the soil moisture lead to make accurate soil temperature measurements. These measurements are then sent to the gateway, making the data available in Premiere or another approved data service.

Features:

• Reports matric potential (soil water tension) which is the best indicator of water availability in the soil.
• Moisture Range: 0 to 240 centibar (kPa)
• Moisture Resolution: ~0.3 centibar or kPa
• Temperature Accuracy: +/- 1.0°C (1.8°F)
• Temperature Resolution: 0.1°C
• Configurable thresholds for critical condition monitoring
• Wireless range of 2,000+ feet through 18+ walls¹
• Frequency-Hopping Spread Spectrum (FHSS)
• Best-in-class interference immunity
• Best-in-class power management for longer battery life²
• Encrypt-RF Security (Diffie-Hellman Key Exchange +
• Advanced Encryption Standard (AES)-128 Cipher
• Block Chaining (CBC) for sensor data messages)
• Sensor logs 2000 to 4000 readings if the gateway connection is lost (non-volatile flash, persists through power cycling):
• 10 minute Heartbeats = ~ 22 days
• 2 hour Heartbeats = ~ 266 days
• Automatic over-the-air updates to sensor firmware (future-proof)
• Premiere Basic Online Wireless Sensor Monitoring and Notification System to configure sensors, view data, and send alerts via SMS text, email, and voice call

1 Actual range may vary depending on the environment and gateway.

2 Battery life is determined by the sensor reporting frequency and other variables. Other power options are also available.

Technical Specifications:

1.       The resolution increases as the centibar readings get lower. Resolution at 0 centibar is ~0.05 centibar, at  240 centibar it is ~0.36 centibar. The sensor is limited to 0.1 centibar by the sensor firmware.

2.       The response time is calculated by measuring the time it takes for the sensor to go from fully dry to saturated by placing the moisture element upright in 1" of water. Therefore, actual response times may vary.

3.       Heat shrinks adhesive melts at ~85° C. Using temperatures at or above this level may compromise the waterproofing of the cable and allow the heat shrink and sleeve to slip and become loose.

4.       The soil moisture element will not work properly while frozen, but the sensor readings will return to normal when thawed.

5.       Operating and storage altitude without DC power supply is  -30.48 to 9144 m (-100 to 30000 ft).

1.       Operating below 0°C (32°F) degrees will reduce battery life.