SUPERtrol-I (ST1)

Multifunction Ratemeter, Totalizer & Batch Controller

The SUPERtrol-I (ST1) Flow Computer offers advanced batching features for all types of flow batching systems. The ST1 is compatible with a variety of flowmeter types in liquid applications. Multiple flow equations and instrument functions are available in a single unit with many advanced features.
The isolated analog output can be chosen to follow volume flow, corrected volume flow, mass flow, temperature, or density by means of a menu selection. Most hardware features are assignable by this method.
The user can assign the standard RS-232 Serial Port for data logging, transaction printing, or for connection to a modem for remote meter reading.


  • “EZ Setup” Guided Setup for First Time Users
  • Rate/Total and Batching Functions
  • Menu Selectable Hardware & Software Features
  • Environmental Compliance Monitoring and Report Generation
  • Universal Viscosity Curve (UVC) and API Eq.
  • Batch Controller with Advanced Batching Features including: Overrun Compensation, Autobatch Start, Print End of Batch,
    Slow Fill, 2 Stage Batching
  • Two Line LCD, OLED or VFD Display
  • Isolated Outputs Standard
  • RS-232 Port Standard, Modbus RTU RS-485 Optional
  • Advanced Printing Capabilities
  • Windows™ Setup Software
  • DIN Enclosure with Two Piece Connectors
  • On Board Data Logging
  • DDE Server & HMI Software Available
  • Enhanced Modem Features for Remote Metering


Training Aids


For Pulse Inputs the Count K-Factor is equal to the number of pulses per unit of measure which is determined by the flowmeter. (This Information is typically on the flowmeter calibration sheet or stamped on the flowmeter itself).

The Rate Time is menu selectable it can be found in the “Setup Indicators Menu” under “Rate”. You will have the option of choosing Seconds, Minutes, Hours or Day which adds the appropriate multiplier into the equation.

The 4-20mA current span is the span you expect the Supertrol-1 to interpolate between. The Supertrol-1 is scaled by assigning a “Low Range” and a “High Range” to the analog Low and High inputs of the Flow Input Menu. Let’s say that the sensor has an output of 4mA (milliamps) when it measures “0” GPM and 20mA when it measures “10” GPM. Through the keyboard you enter in “0” for 4mA (Rate Low), and “10” for 20mA (Rate High) and you have completed scaling the unit. Typically the customer will tell you the range they would like to use for their application.

The unit is shipped from the Factory with an Operator Password of “0” and a Supervisor Password of “2000” these should be tried first before giving the customer the back door code. The Factory back door code can be obtained by calling the factory or send an email.

Yes. The analog output is Isolated. Below you will find the specifications for the analog output that customers usually ask about.

The Analog Output is: Isolated Current Sourcing, Isolated I/P/C: 500 V
The Available Ranges are: 4-20 mA, 0-20 mA
The Resolution is: 12 bit
The Accuracy is : 0.05% FS at 20 Degrees C
The Update Rate is: 1 update/sec minimum
The Temperature Drift is: Less than 200 ppm/C The Maximum Load is: 1000 ohms (at nominal line voltage)

Yes. The Supertrol-1 is equipped with a battery backed real time clock that displays time and date. The format is: 12 or 24 hour time display and Day, Month, Year date display.

Yes, the front panel is NEMA 4X rated. This rating is also comparable to the European standard IP65.

The user can view the Rate and Total of flow as well as the Grand Total, Temperature, Density, Time, Date, Preset 1 and Preset 2. This can be accomplished by pushing the appropriate button on the front of the unit or by setting up the Scroll List to display the the information desired through a scrolling display

The Supertrol-1 has the following Listings: “CE” which is the European noise immunity Standard, and  which is the Underwriters Laboratories of Canada Standard.

The D.C. output is rated at 100ma maximum current draw. The D.C. output is also selectable. The user can select from three excitation voltages of 5, 12 or 24 Vdc to power their transmitters

Below you will find typical wiring diagrams to help you wire a flowmeter to the Supertrol-1

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