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It comes in a robust aluminium housing, with integrated battery and 0.5W radio transceiver. Power is supplied via an internal NiMH battery and solar panel the size of a postcard. Sensors are connected to the analogue, pulse and SDI-12 channels via two 7-pin binder connectors. The logged data is then transmitted at regular intervals to a telemetry base station (A850 Gateway and A440 Radio Modem) or RA440 UHF to GPRS Bridge, over a licensed radio frequency (450 to 470 MHz). The A752 may also be used as a repeater, relaying data from low power A723 and A724 units back to the base station. The A752 has a range of 5 to 20 km, depending on terrain and antenna height.
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- Soil moisture monitoring
- Automated meter reading
- Agriculture - plant protection
- Urban and rural water supply utilities
- Science, research & development, and much more
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Dimensions
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160 x 60 x 80 mm
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Weight
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1.2 kg
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Protection Type
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IP-67
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Temperature range
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-30°C to +65°C
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Case
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Powder-coated aluminium
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Connectors
(all connectors IP67 if properly mated or capped)
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2 x Binder M9 7-pin to sensors
1 x Binder M9 5-pin to solar cell/power supply
1 x TNC Antenna connector
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Power supply
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6.,2 V NiMH battery 3.3 Ah with charge from solar cell / mains adapter
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I/O-Ports
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6 x analogue ( 0 - 1/2,5 VDC ; Including 3 x 0 - 150mV )
2 x pulse counter
2 x digital in/out ( 0 - 3V TTL)
40 x SDI-12 values
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Sampling Interval
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10sec. to 12h
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Measuring method
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synchronous & sequential
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Internal memory
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2MB for up to 500,000 values
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Resolution
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Analogue :16-Bit @ 0 - 2.5 V
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Pulse Counter
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1 x 50Hz and 1 x 500Hz
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Operating time(without charging of internal battery)
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Standard mode: up to 21 days, Power-save mode: up to 6 months; depends on slot time,transmission rate, and type of sensors
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Frequency range
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450 to 470 MHz
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Rx Sensitivity
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-106 dBm
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Tx Output Power
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max. 1 W
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Transmission distance
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5 to 20 km
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Antenna
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Omnidirectional quad-band, 2dBi
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