RA440 Remote Wireless GPRS UHF Bridge Modem

  • The ONLY solution for truly remote locations RA440 can be used in remote areas to bridge UHF RTUs to the GPRS network
  • 24/7 live connection to all RTUs Up to 20 RTUs in network
  • Low Power Only requires 1 4-watt solar panel (A5 size)
Product Options


The RA440 Bridge modem incorporates a 500mW UHF radio modem and a Motorola quad-band GPRS modem. Where the regular A440 connects to the A850 gateway by means of a cable, the RA440 ('Remote A440') connects via GPRS

The RA440 wireless bridge telemetry modem is used in areas that lack GSM coverage and don't have access to mains power, internet and phone connection. In this situation remote radio telemetry units can be installed on site wherever they are needed and the RA440 will be placed at the nearest location that has GSM/GPRS coverage. The RTU's can then communicate with the RA440 via UHF and the RA440 then communicates with the A850 gateway via GSM/GPRS. The process of communication is very quickly and once instructed by the A850, communication with the UHF usually starts within just a few seconds wherever it is in the world. A standard solar panel is used to charge the RA440's internal battery. If more power is needed a standard 12 Volt battery can be connected to the external power port and/or a secondary battery pack can be installed inside the RTU.

It is therefore possible to see that an Adcon telemetry unit can be installed anywhere in the world, irrespective of power, signal or timing issues. That is capability unmatched by any company globally. Clients therefore can have telemetry dataloggers installed where they want, not where there is signal! License upgrades to the A850 gateway provide the capability to connect to up to 10 RA440's.

Manufactured by: Adcon Telemetry
Model: RA440 Remote Wireless GPRS UHF Bridge Modem

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Bridges UHF RTUs to the A850 telemetry gateway
'Go Anywhere Approach'
Real-time communication where there is no GSM / GPRS Coverage.


Power Supply

internal 6.2V battery, charged by solar panel or mains adaptor

Battery type Panasonic High-Temperature Industrial Grade NiMH battery,
Approvals FCC, R&TTE, CE, Industry Canada, Radio Australia
Case Aluminum, powder coated
Protection type IP-67
& weight
160 x 60 x 80 mm (6.3 x 2.4 x 3.1 inch)
1200g (2.5 lb)
Connectors for sensors and
Made in Germany by Binder
IP-67 protection class
Sockets: brass, nickel plated
Socket contacts: gold plated
Protective caps
4 x M9 female 7-pin
1 x M9 female 5-pin
Antenna connector TNC with external seal, water tight , Made in Germany
Mounting Mast mounting bracket
Operating temperature -20°C - +75°C
Input Channels 60 total
Analog Inputs 12 x 0 - 1V / 2.5V DC
( 3 of these inputs can be configured
for a range of 0 - 150mV DC low temp.drift)
Digital Inputs 40 x SDI-12 values
Counter Inputs 2 + 2
I/O A + I/O D: for standard reed switches; electronical signal
debouncing, e.g. for rain gauges; max. pulses per second: 30
I/O B + I/O C: for hi-speed pulses, e.g. wind speed sensors or flow meters; max. pulses per second: 500
TTL Inputs / Outputs 4 x TTL compatible status ports (input) or Switch (output), user
selectable (2 of which with 5V, 2 with 3.3V)
Resolution on analog ports 16-Bit
Sensor Power Supply User selectable:
- Unregulated battery Voltage 5.5V-7.5V
- Stabilized Voltage: setable from 3.3V-7.5V
Memory 256KB for up to 80.000 readings (depending on types of sensors
attached) Example: ETo station, 15�?�¢??minute values: 28 days
Special Logger Functions - Configurable
Wind Gust Monitoring Port C + Adcon Wind Sensor:
4 x samples per second, 3-second average; Date/Time of top speed
Wind Vector Monitoring Port C + Adcon Wind Sensor:
Direction is measured at time of speed reading; direction is weighed
by speed and stored as vector
Rain Intensity Monitoring Port D + Pulse Rain Gauge
(max. resolution is 1 second)
Date/Time of every single pulse stored; if required up to 3 additional analog values and 2 counters can be stored, e.g. wind speed & direction plus temperature
Pressure Hammer
Port C + Adcon Manometer Probe:
permanently powered sensor measures 4 x per second for pressure hammers with a 3�?�¢??sec. average
Low Voltage Amplifier Port B: allows usage of sensors with mV output signals to be attached directly
Asynchronous sampling To reduce interference caused by synchronously sampling all ports
they can be turned on and off sequentially
Event Monitor In order to detect status changes on a digital input the station can
sample each digital port with a time resoltuion of 1 second; date and
time of every single status change are logged. Application: error
monitoring on equipment, intrusion detection, pump operation, etc.
Data Transmission
Frequency range 900 & 1800 MHz (Europe) and
850 & 1900 MHz (Americas)
Modem Motorola G24L
SIM Card small footprint
Security SIM cards are PIN code protected!
Connection types GSM: CSD Circuit Switched Data
GPRS Connect Frequency User selectable:
- permanent connection
- connect from 1 x per minute to 1 x per day
Antenna Omni directional