Electro-Sentry 1 for grain elevator legs monitors for shaft slowdown, belt misalignment and bearing temperature as part of a dust-explosion prevention program. Control panel shows all sensor values and alarm conditions; one-button push-to-test verifies operation of sensors, set points and alarm output relays; and it includes 13 analog inputs and eight relay outputs. Sensors provide a standard 4–20 mA signal compatible with IS barriers, PLCs, meters and data acquisition systems
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