RD55 is a data logger - transmitter designed to satisfy the needs of data processing, logging and transmitting environmental data from any setting.

Conceived mainly for the acquisition of serial digital inputs, has the option of installing an interface board for data acquisition from: frequency, pulses and analog sensors.


- Serial inputs can be: SDI-12, RS232, RS485; the built-in protocols satisfy most manufacturers.
- The kind of hardware and embedded operating system let the RD55 incorporate any other proprietary protocol as well as any processing algorithm to satisfy the customer needs.
- The collected data are stored in an internal memory of 8 GB corresponding to intervals from 1 second to 24 hours.
- RD55 has Ethernet interface to be connected to the user IP network.
- Built in 3G/GPRS modem for transmitting from most remote locations without infrastructure.
- A serial RS232 output is supplied for any other way of transmission (radio, satellite, etc.)
- Built in GPS for time synchronization.
- A 4.3” touch screen colour display is supplied for parameter visualization and set up and maintenance tasks.


RD55 Technical Data

Optional Inputs


Voltage Mode


   - 4 single-ended


   - 2 differential


Resistor mode


   - 2 inputs (e.g. PT100)


Current Mode


   - 4 inputs (e.g. 4-20 mA)


3 Inputs:


- 2 frequency/counter


- 1 8-bits parallel / synchronous serial

Range, Resolution and Accuracy






0¸2.4 V

50 µV

500 µV

0¸70 mV

10 µV

100 µV

Digital frequency

10 KHz

1 Hz

1 Hz



1 pulse

1 pulse

Measurement Processing

Processing time levels

Capture, Sampling and Integration


1 second~24 hours

Data presentation

E.g. -30ºC~70ºC, 4-20mA, etc.

Real-Time Clock


dd/mm/yyyy - hh:mm:ss

Resolution & Drift

1 second - 10 ppm


By internal GPS or SNTP (IP)


The analog interface card, the display and the 3G / GPRS modem are optional elements.

Serial Communication

Ethernet 1 port
RS232 2 ports
RS485 2 ports
SDI-12 1 port
Modem 3G/GPRS

Display & Keypad

Display 4.3” touch screen display

Power Supply Features

Power supply 8~32VDC
Max power consumption 1.5W
Operating temperature range -40ºC ~60ºC

Processor & OS

Processor ARM Cortex A5
Operating System Windows embedded


Case Painted Aluminium
Length 170 mm
Width 130 mm
Height 60 mm
Weight 560 gr