Inc. announces the ST420, a loop-powered,
stainless-steel analog shaft tachometer. The ST420 requires no user
calibration, providing a dependable shaft speed monitoring solution right out
of the box. Only 18 mm in diameter, it reliably detects magnetic pulses from a
rotating shaft-mounted pulser disc or wrap. Then, the ST420 uses quartz
crystal-based digital processing to convert pulses to a smooth, continuous
4-20mA analog signal directly proportional to the pulse frequency. The result
is a plug-and-play solution that allows users to accurately and simply monitor
rotating shaft speed in industrial applications.
ST420 shaft tachometer has been tested by UL to the standards UL913 and CAN/CSA
C22.2 No 157-92 (Intrinsic Safety), assuring it provides an intrinsically safe
solution for Class I (Groups C & D) and Class II (Groups E, F & G)
environments, when used with an approved I.S. barrier. Its magnetic pulse
detector, signal processing capability and 2-wire loop-powered 4-20 mA
circuitry are combined into a stainless-steel M18x1 sensor housing. The ST420
resists harsh plant environments and is rated NEMA 4X/IP67.
both standard and custom measurement ranges, the ST420 facilitates precise
shaft speed monitoring in industries including:
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