| Environment Information
Technology has developed an innovative ultra low power, radio data transceiver
device which connects to analogue and counter sensors, and encodes this
information for radio data transmission.
Systems incorporates 433
MHz external radio module transmitting at 25 mWatts
This unit can control and receive incoming data over the short range 433 MHz bandwidth and retransmit via high power 5 watt radio modems providing an effective long range data transmission option. |
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| Repeater
/ receiver unit :
Although designed for use in conjunction with the EIT range of sensors and automatic weather stations, the devices can be adopted by other design engineers for use wherever low powered, and particularly radio based data transfer is required. The technology has significant advantages over existing methods. It is economical to install, consuming just 2 mA in sleep (standby) mode and up to 20 mA in transmit mode. An EIT Datatenna device provides radio data transmission within the requirements of the Australian specification for unlicenced radio data, for distances up to 1.5 kms. |
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| Released July 2001 - SDI
Radio Data Controller
This unit will collect data from an SDI-12 based probe device and encode data for radio transmission. The device has been developed to provide a radio interface between the Sentek EnviroSCAN multi level soil probes and an EIT data recording system. The transmitter provides power to the soil probe and controls sensor warm up time and data transmission intervals For more information see SDI - 12 Radio Data Controller and Soil Moisture Monitoring system |
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soil moisture probe radio transmitter |
The applications for this technology are diverse. The UTN was originally developed to monitor soil moisture conditions in irrigated agriculture. Such information may be measured kilometers from the central data collection system and transmitted by radio economically.
Other applications for the device may include the measurement of remotely positioned soil temperature sensors, pressure transducers, flow monitors, water level, wind direction and wind speed sensors and similar measuring devices.
The Universal Data Transceiver is supplied with Windows based programming software, which allows the user to configure the device, view, address and capture data.
The UTN units are addressable devices allowing up to 250 units to be linked to the one central receiver. Each node has its own (user settable) electronic identification label. Software provided allows the configuration of a UDT Tx device to function as a transmitter, repeater. The UTN Rx devices can be programmed as a final receiver or repeater station. The software also allows the user to program sensor sampling, transmission and sensor settling time
Data from the UTN receiver (Rx) is fed into an EIT eTech series data recorder, serial interface device or PC. A separate communication port on the receiver allows the user to view incoming data via a terminal program such as Hyperterminal. Data protocol is modbus and encoded as a hexadecimal string from which the data can be transformed.
The UTN devices are supplied
either as a separate item or with support stand, solar panel and Datatenna
unit.
| Product code: | EIT-UDT/4A |
| Sensor input channels: | 4 analogue 0-1 ( 3 *10 bit
resolution , * 12 bit resolution ) + serial input port
TPS WP 81 water quality instruments, Shaft encoders, counter devices |
| Operating voltage: | 8 - 30 Volts DC |
| Operating current: | Transmit 20 mA - standby mode 2 mA |
| Receiver mode : | Wake mode 40 mA - sleep 2 mA |
| Minimum transmission periods: | 10 seconds |
| Programmable sensor settling time: | 1 second minimum |
| Programming software supplied: | Windows/98/95/3.1 |
| Communication protocol | Modbus |
| Range | 1000 meters line of site |
| Antenna | 1/4 wave omni-directional stainless steel ( 300 mm length ) |
| Housing | Powder coated aluminium |
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Applications:
Radio
soil moisture monitoring 1
Water
quality monitoring
Sentek
soil moisture monitoring network