KEPmeter SUPERtrol-I (ST1) Multifunction Totalizer Batch Controller & Ratemeter

The SUPERtrol-I Flow Computer satisfies the instrument requirements for 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 alphanumeric display shows measured and calculated parameters in easy to understand format. Single key direct access to measurements and display scrolling is supported.

The versatility of the SUPERtrol-I permits a wide measure of versatility within the instrument package. The various hardware inputs and outputs can be “soft” assigned to meet a variety of common application needs. The user “soft selects” the usage of each input/output while configuring the instrument.

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 a remote meter reading. Remote metering software available.
A Service or Test mode is provided to assist the user during start-up system check out by monitoring inputs and exercising outputs and printing system setup.


  • “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.
  • Advanced Batching Features: Overrun Compensation, Print End of Batch,
    Slow Start of Batch Fill, Slow End of Batch Fill, 2 Stage Batching
    Digital Control Valve
  • Isolated Pulse, Analog and Relay Outputs Standard on AC Powered Models
  • 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 (optional TROLlink)
  • DDE Server & HMI Software Available
  • Enhanced Modem Features for Remote Metering


Flow Meters and Computations Meter Types: All linear and square law meters supported
Including vortex, turbine, magnetic, PD, target, orifice, venturi, v-cone and many others
Linearization: Square root, 16 point table or UVC table
Computations: Volume, Corrected Volume & Mass
Fluid Computations: Temperature, Density, Viscosity, and API 2540 for petroleum
Power Input The factory equipped power option is internally fused. An internal line to line filter capacitor and MOV are provided for added transient suppression.
110 VAC Power: 85 to 127 Vrms, 50/60 Hz
220 VAC Power: 170 to 276 Vrms, 50/60 Hz
DC Power:
12 VDC (10 to 14 VDC)
24 VDC (14 to 28 VDC
Analog Input Accuracy: 0.01% FS at 20° C
Ranges Voltage: 0-10 VDC, 0-5 VDC, 1-5 VDC
Current: 4-20 mA, 0-20 mA
Basic Measurement Resolution: 16 bit
Relay Output The relay outputs are the menu assignable to (Individually for each relay) Low Rate Alarm, Hi Rate Alarm, Prewarn Alarm, Preset Alarm or General purpose warning (security), low temperature/high temperature.
Number of relays: 2 (4 optional)
Contact Style: Form C contacts
Contact Ratings: 5 amp, 240 VAC or 30 VDC
Serial Communication The serial port can be used for printing, data logging, modem connection and communication with a computer.
RS-232 (Standard)
Print Setup: Configurable print list and formatting.
RS-485: (optional 2nd COM port)