Item # 800-001620, ST4520 Shaft Speed Sensors

Features:
• 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
• Reverse-wiring protected
• UL listed, Intrinsically Safe (IS) 
• Class I, Div I (C, D) Class II, Div I (E, F, G)

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

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