The EIT Datatenna unit is a telemetry device with radio module and antenna combined in one sealed unit. The device can be used over short distances to connect remote sensors for various environmental monitoring purposes and was specially developed to provide radio data links to the EnviroSMART soil moisture sensors. The device uses the (UK, EU, Aust) unlicensed 433 MHz, low power radio frequency technology.

The unit has been designed to conform to the requirements of the Australian Communications Authority radio communications class licence for low interference potential devices (LIPDs). This Australian class licence provides for the operation of transmitters in this band (433.05 to 434.79 KHz) up to a maximum equivalent radiated power (EIRP) of up to 25 mW.

The Datatenna unit is used in conjunction with the EIT range of Intelligent Probe Controller ( IPC ) devices. These devices control data collection and transmission from sensors such as soil probes, water quality instrumentation, current and voltage input devices.

Applications.

The low power data transceiver was developed to provide a wireless data link between remotely positioned sensors and a central data recorder, weather station, PC or SCADA system . The transmitters provide a wireless link for sensors which would typically be located within a range of 1.0 kilometer of a central PC. 

The radio link has many advantages including saving the cost of providing cables between a field data recorder and PC and / or the time involved in visiting site to retrieve data into a portable PC. The radio link virtually eliminates damage to field instrumentation associated with line surge during lightning events.

The unit is supplied with integral mounted antenna in waterproof housing for direct placement in the field. 

 This technology when used in conjunction with the EIT telemetry based soil moisture monitoring system will provide irrigation managers with powerful decision support technology.