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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.




  • Soil moisture monitoring Automated meter reading Agriculture - plant protection Urban and rural water supply utilities Science, research & development, and much more



160 x 60 x 80 mm


1.2 kg

Protection Type


Temperature range

-30°C to +65°C


Powder-coated aluminium


(all connectors IP67 if properly mated or capped)

2 x Binder M9 7-pin to sensors

1 x Binder M9 5-pin to solar cell/power supply

1 x TNC Antenna connector

Power supply

6.,2 V NiMH battery 3.3 Ah with charge from solar cell / mains adapter


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

Sampling Interval

10sec. to 12h

Measuring method

synchronous & sequential

Internal memory

2MB for up to 500,000 values


Analogue :16-Bit @ 0 - 2.5 V

Pulse Counter

1 x 50Hz and 1 x 500Hz

Operating time(without charging of internal battery)

Standard mode: up to 21 days, Power-save mode: up to 6 months; depends on slot time,transmission rate, and type of sensors

Frequency range

450 to 470 MHz

Rx Sensitivity

-106 dBm

Tx Output Power

max. 1 W

Transmission distance

5 to 20 km


Omnidirectional quad-band, 2dBi

Related Categories
Water Quality Multiprobes
Water Level Sensors
Weather Stations
Soil Moisture
Data Services