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BEP Controller

The BEP Controller is an intelligent and versatile instrument designed to interface to standard industrial analogue and digital sensors. The measured inputsignals are captured for internal recording control.


  • The instrument can be interfaced simultaneously with up to four 4-20mA or 0-5 V analogue and four digital sensors performing measurements and computing parameters such as: Percentage, Level, Volume, Open Channel Flow, Temperature, pH, or Pressure.
  • The instrumentation is able to provide 24V 0.9A power for the Seonsors and it measures the output signal from each connected sensor for recording or control.
  • As a controller, the instrument can be programmed with various set points resulting in analogue outputs (PID) and relay (six) actions according to the measured inputs. Complex switching sequences, are possible and pump rotation for even wear as has been implemented.
  • As a recorder, the instrument is capable of storing as much as one month's data at one-minute intervals or more than a year's data at 15-minute intervals, logging all data channels.
  • Configuration of the instrument can be done via the six function keys and the graphical LCD display or via a personal computer (PC) using the custom software supplied with the unit. The configuration is password protected.
  • Using a personal computer and the custom software supplied with the unit, the instrument can be configured and all recorded data can be displayed in graphical format. The recorded data an also be exported for further analysis in .CSV format.
  • Remote communication with the instrument is possible using RS232 / RS 484, MODEM or GSM MODEM (Data & SMS). Via this interface, configuration changes and data retrieval are possible. Using the RS485 interface, a network of up to 32 BEP Controllers can be created. RF Telementry is easily implemented by adding an external RF Transceiver.
  • Loop powered 4-20mA devices such as Level, Pressure, pH and Temperature meters can be translated to their respective functions, Volume/Level, Pressure, Acidity and Temperature by using one of the pre-programmed conversion formulas or via a custom set points table.
  • When a 2-wire loop powered ultrasonic level transmitter is connected, the BEP Controller can be set to interpret the signal as Percentage, Distance / Level, Volume or Flow. Several pre-programmed types of vessels, weirs and flumes are available to easily configure Volume & Flow applications; alternatively a 15 point custom table can be used. Combined functions, such as Add, Subtract, Average and Dual Flow operations are also possible when using two input signals. Totalizer functionality is provided for each channel.


  • Four 4-20mA / 0-5V Analogue inputs
  • Four Digital inputs
  • Able to provide 24V/0.9A power for external sensors
  • Able to provide 12V for an external MODEM


  • Six Relays
  • Two Digital outputs
  • Two Analogue outputs (4-20mA)


  • Graphic LCD display
  • Six keys Keyboard
  • Personal computer with custom software

Data Logging & Communication

  • Data can be exported to PC
  • Two Megabyte flash based storage
  • Remote data retrieval
  • RS232 / RS485 network operation
  • MODEM / GSM MODEM interface
  • Firmware can be updated in the field

Custom Software

  • Indepndently programmable inputs
  • Pre-programmed conversion formulas
  • Programmed custom set point table
  • Remote configuration and data retrieval
  • Programmable control functions
  • Programmable measurement functions

Analogue Inputs

  • Isolated 4-20mA or 0-5V, measured at 12 bits resolution. Inputs can be averaged for up to 128 readings.

Analogue Outputs

  • Two isolated 4-20mA, generated at 12 bits resolution

Digital Inputs

  • Optically isolated, requires a minimum of 1.3V/2mA DC to register a signal.

Digital Outputs

  • Able to switch 30mADC, maximum voltage is 80VDC, pulse output for connection to an external totalizer.


  • Six Relays, per relay N/O and N/C 6A 250VAC/28VDC


  • Via front panel or remote configuration using the PC custom software. Common configurations can be stored in templates, to be used in new instrument configurations. Configuration is password protected.

Front Panel User Interface

  • Graphic LCD, capable of displaying 8 lines of 20 characters. Six button keyboard for configuration purposes.


  • Two Serial Ports, one external DB9 connector. Port 2 can be configured as RS485 or RS232 and can be used as MODEM/GSM MODEM or RF Telemetry interface. Network of up to 32 BEP Controllers is also possible via the RS485 interface.

Data Logging

  • Two megabyte flash based memory. Data logging is configurable on a per minute basis up to a maximum of 99-minute intervals. Using 15 minute logging intervals, a Data-Log of over 1 year in length can be created.

Measurement functions

  • Level, Volume and Flow. Various standard tanks/weirs/flumes or custom tables can be selected. Totaliser functionality is provided for each channel.
  • Add / Subtract / Average / Dual measurements for Flow, Level and Volume using two transducers
  • 4-20mA Loop powered devices, such as Level, Pressure, pH & Temperature

Control functions

  • Programmable set points with hysteresis functionality.
  • Daily and/or periodic timer functions.
  • Configurable Pump rotation for wear leveling.
  • PID Control


  • AC 90 - 230V / Max Power 10W
  • Able to provide 24V / 50mA power for external sensors.
  • Able to provide 12V for external MODEM

Temperature Range

  • Operating temperatures: -20°C to 60°C
  • Storage temperature: -40°C to 80°C


  • UC resistant, IP65 (NEMA 4X)

Physical Dimensions

  • Length: 230mm
  • Width: 270mm
  • Height: 76mm



Our aim is to provide our customers with practical, cost-saving engineered solutions and through our worldwide and local/manufacture supplier contacts and service facilities, we are able to offer complete instrumentation packages. These comprehensive packages include controllers, data loggers, control panels and turnkey projects.