The patented ST420-LT and ST420-DI are 2-wire, loop-powered, 4-20mA analog output shaft speed sensors. They 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. The ST420-LT and ST420-DI have integral conduit attachments, are NEMA 4X, IP65 and Dust Ignition-proof for Class II, Div I (E, F, G) hazardous locations.
All models have rugged stainless steel M18x1 housings for harsh environments and require no user calibration. Custom measurement ranges are available upon request.
ST420-LT Speed Sensor with Stainless Steel Split Collar Pulser Wrap
• No user calibration: works right out of the box
• 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
Simplify ST420-LT and ST420-DI Mounting with the EZ-18mm Bracket Assembly and MM-1.25 Mounting Magnet (for non-tapped shafts)
- Mounts directly to the tapped shaft
- Optional Mounting Magnet if shaft is not tapped
- Pulser disc is included