Series of microprocessor based weighing indicators that are easy to configure for a wide range of applications.

Designed and developed to last and provide the maximum flexibility, simplifying the installation.
R420 is provided with a range of optional modules that are easy to configure and connect into the rear of the indicator. Modules include: serial ports, inputs/outputs, analog outputs, external buttons, Ethernet interface, ideal for interfacing with PLC or PC.




  • 9 different firmware to cover a wide range of applications.
  • 8 set-point.
  • Large display and programmable function keys for a simple programming.
  • OIML R76 (10,000d@0.7uV/d) approval.
  • Modular design which allows the possibility of mounting only the components required.
  • Case designed with extra attention to detail to increase the reliability in the field and reduce the servicing costs.
  • Simple installation and setup using the alpha-numeric keypad or the View400 configuration utility (compatible with Windows).
  • Possibility of customizing the prints.
  • Ethernet and Profibus DP Interface.
  • RS232C and RS485 optically-isolated Interface.
  • Up to 32 I/O.
  • 4-20mA and 0-10V isolated Analog Outputs.
  • 4 inputs External Keyboard.
  • Data storage Module with a non volatile memory (6M bytes).

Technical Specifications

Display   LCD with 4 alpha-numeric displays backlit
Keyboard   20 mechanical buttons
A/D Converter   24-Bit Sigma-Delta
Resolution   100,000 divisions (minimum 0.25uV/d)
Load Cells Supply Voltage   7.4Vdc (protected against over-voltage)
Load Cells Connection   Max. 16 350 ohm load cells
Unit of Weight   g, kg, t, lb, Oz, N
Digital Filter   Sliding window average from 0.1 to 30 seconds
Power Supply  
12 ... 24Vdc
Power Consumption   Max. 30W
Operating Temperature   -10°C … +50°C (+14°F … +122°F)
Case   ABS
Degree of Protection (EN60529)   IP65
Weight   1.0kg (2.2lb)
Dimensions (L x W x H)   246x121x65mm (9.7”x4.8”x1.4”)



  • Stainless steel housing (IP66).
  • 110/240Vac 50/60Hz Power Supply Module.
  • Battery Power Supply Module (2.5AH NiMH rechargeable).
  • DIN mountable 12 or 24Vdc Power Supply.
  • Magnetically coupled Opto-link for a convenient temporary connection to a laptop without the need to access the rear panel of the indicator.
  • 8 relay 250ACV/8A Module, DIN rail mountable.
    Availability contacts N/O and N/C for each output and 12 or 24VDC.
  • Relay module connection cable.