FB420 Speed Switch

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Manufacturer: Electro-Sensors

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**NOTE: Due to the complexity of configuring this product, please call 805-576-7625 or 805-576-7625 for quotes, configurations and prices**

Electro-Sensor’s FB420 is an integral part of the Electro-Sentry™ Hazard Monitoring System but is also available as a stand alone shaft speed sensor. The FB420 provides a 4-20mA signal directly proportional to the rotational speed of a monitored shaft and has a 4 digit LCD display capable of displaying from 0.000 to 9999. RPM or from 04.00 to 20.00 mA, the display is also used for calibration and trouble-shooting. The FB420 has one relay that can be programmed for failsafe over-speed alarm or failsafe under-speed alarm.

Housed in a rugged, explosionproof NEMA 4X housing, the FB420 is ideal for detecting shaft under-speed or over-speed on a wide variety of industrial machinery. Typical applications include belt conveyors, drag conveyors, bucket elevators, fans, blowers, crushers, and pumps.

Features Include:

Stand alone or part of the Electro-Sentry™ Hazard Monitoring System
Compact, self-contained system with sensor and switch
Simple installation and calibration
Relay can be set for over-speed or under-speed
Rugged housing is explosionproof and waterproof - NEMA 4X
4-20mA output directly proportional to shaft speed
Provides real time preventive maintenance feedback
Prevents product waste, machinery damage and process downtime

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