Environment Information Technology provides wireless data solutions for connecting remotely positioned environmental sensors to data recorders and data acquisition systems.  We specialize in developing very low power radio solutions for environmental monitoring, and in particular the monitoring of soil moisture conditions in irrigated agriculture. EIT has developed a special range of radio transceivers, and transceiver control devices, for wireless connecting Sentek EnviroSMART multi level soil moisture sensors. In addition to telemetry devices we have designed a range of data recorders for collecting and storing data. EIT data recorders are supported by software for viewing and graphing collected data. There are several options for wireless networking of remote sensor devices. The choice of radio options depends on project requirements and is influenced by the distance, data speed and amount of data you wish to transmit across your network. The regulation, licensing, and governing of the radio transmission spectrum varies from country to country. Licence free radio data tranmsisison spectrums are provided by many countries for various purpsoses. Check with the spectrum management authority in your country for licence free data transmission regulations.

Radios spectrums and devices used by EIT

433 MHz Telemetry - a radio spectrum that provides for licence free data transmission in EU UK Austalia and many other countries.. Maximum transmission strength in Australia is 10 mW. Radio transmission module Radiometrix. Radio module conforms 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.

476 MHz Telemetry - a radio spectrum which in Australia, allows 'licence free' data transmission at up to 5 W. The maximum amount of data that can be transmitted 'licence free' is limited to 3 seconds per hour. This is more than sufficient for monitoring soil moisture using EIT data compression and sampling technology. The EIT 5 watt radio data transmitter will provide error free data transmission for up to 50 kms in open agricultural areas. Radio types used by EIT in Australia include GME TX 3600 and Trio Datacom.

450 - 520 MHz - we are able to provide data communications using third party supplied radio data modems. In Australia we use and recommend the GME TX 3600 data radio. Our IPC device will suit a wide range of radio modems for use in most countries.

900 MHz Spread Spectrum Telemetry

Licence free data transmission is provide in the bandwidth 902 - 928 MHz in many countries. Check with your country spectrum management authority.

This bandwidth and radio technology, provides EIT with a mid range radio solution for data transmission.

EIT uses the Maxstream radio OEM module which we have embedded into the IPC controller device. This controller provides data flow control from the Sentek EnviroSMART probe to the base receiver station.
 

	Radio specs
Frequency	902 - 928 ( USA ) 918 - 928 ( Australia )
Type	Frequency Hopping Spread Spectrum Transceiver
Frequency control	Direct FM
Serial Baud Interface Rate	9600
Transmit Output Power	100 mW
US Certificate	FCC ID OUR9XTREAM
Manufacturer	Maxstream Inc. - Utah - USA
Range	=> 4.0 kms - line of sight - in open country with dipole antenna.