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Electronic Stroke Control
Electronic Stroke Control

The Neptune Electric Stroke Control allows the capacity of any Neptune Series 500, Series 600 or Series 6000 "dia-PUMP" to be automatically controlled in response to a standard 4-20 mADC process signal. Alternate inputs are 0-5 VDC / 0-10 VDC signal or incremental contact closures. One-piece controller-positioner mounts directly to the pump. No machining or any special drillings or tappings needed to retrofit pump.

Ideal for water/wastewater, power and process industry applications – anywhere that pump flow must be automatically proportioned or varied.


  • Microprocessor based digital design.
  • Permanently lubricated, maintenance free.
  • Unrestricted duty cycle.
  • Input signal adjustments:
    – Zero and span settings unlimited
    – Adjustable dead band
    – Adjustable upper and lower limits
  • Signal interruption "memory." If process signal is lost, unit can remain in its last position or move to a preset position.
  • Multiple units can be wired in series or parallel.
  • Alarm function monitors: 1) movement to max/min preset limits; 2) movement to adjustable upper/lower limits. Gives early warning to malfunctions or process upsets, allows for quick corrective actions.
  • Manual operation if power or signal is lost
  • Stroke position indicator on controller. Permits fast, easy visual check of pump stroke length.
  • Separate signal and power entrance connections to terminal blocks.


  • NEMA 4 (IP65) or Explosion-Proof (Class I, Division 1, Groups C & D; dust & ignition-proof rated Class II, Division 1, Groups E, F & G)
  • Power supply: single phase 120/240 VAC (switch selectable), 50/60 Hertz, 18 VA load
  • Operating temperature: 0°F to 150°F
  • Input signal: 4-20 mADC or 0-5 VDC or 0-10 VDC switch selectable. Also accepts incremental contact closures (dry contacts).
  • Output: isolated 4-20 mADC; loop-powered, up to 800 OHM load at 24V
  • Precise pump stroke positioning accurate to ±0.75%
  • Solid state limit switch outputs with LED status indication (for alarms or process control)
  • Limit switch rating: open collector 40 mA max. @ 40 VDC

You can download product information for the Neptune Electronic Stroke Control line (PDF format) here:

  • Data Sheet (specifications, performance charts & dimensions)

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