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:
Two different shape-shifting polymers have been announced from two different universities: Wyss Institute at Harvard University and Zhejiang University in eastern China. Both of them change their shapes when immersed in water, and the one from Wyss Institute was made with 3D-printing techniques.
When you think of the DARPA Robotics Challenge, you may imagine complex humanoid contraptions made of metal and wires that move like a Terminator Series T-90. But what actually happened at the much-vaunted event was something just a bit different.
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