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ST420-LT / ST420-DI

ST420-LT / ST420-DI

4-20 mA Shaft Speed Sensors

  • 2-wire, loop-powered 4-20 mA analog output
  • No user calibration: works right out of the box
  • Works with shaft-mounted pulser targets (disc/wrap)
  • Rugged stainless steel M18x1 housing
      with integral conduit attachment
  • Reverse-wiring protected
  • FM approved, Dust-Ignition-Proof Class II, Div I (E, F, G)
  • NEMA 4X, IP65

ST420-LT                    Integral ½ in flexible liquid-tight conduit fitting
ST420-DI                    Integral ½ NPT female conduit port

The patented ST420-LT and ST420-DI detect passing magnets of a shaft-mounted pulser disc or wrap and output a smooth, continuous 4-20 mA analog signal in direct proportion to shaft rotation speed.

Custom speed and pulser disc/wrap PPR ST420-LT and ST420-DI models are available upon request.

Optional EZ-18mm Easy Sensor Mount
(see EZ-18mm page for more details)

EZ-18mm Easy Mount for Speed Sensors

•  Mounts directly to the tapped shaft
•  Can be used with optional
     Mounting Magnet if the shaft is not tapped
•  Pulser disc is included with optional EZ-18mm
•  EZ-18mm is for Series 18, ST420
     Series, and SpeedTalker Sensors