Shaft Speed Sensor with Relay
Features
• FB420 2.0 includes onboard sensor testing
• Self-contained system with built-in speed sensor and relay switch
• Relay can be set for over-speed or under-speed
• Housing is explosion proof and water resistant
• 4-20 mA output directly proportional to shaft speed
• Provides real-time preventive maintenance feedback
• Class I, Div I (C, D) Class II (E, F, G)
The Electro-Sensors FB420 speed sensor provides a 4-20 mA 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 9,999 rpm or from 4 to 20 mA, the display is also used for calibration and trouble-shooting. The sensor has one relay that can be programmed for failsafe over-speed alarm or failsafe under-speed alarm. The 2.0 model of the FB420 has built-in sensor tester functionality. The test allows the user to test for slowdowns, this allows the user to test for system warnings and shutdowns. The FB420 is used to monitor shaft speed on equipment that includes: belt conveyors, drag conveyors, bucket elevators, fans, blowers, crushers, and pumps.
Optional Mounting Magnet: MM-2.00
(See EZ Mounting Magnets Page for More Information)
• No Drilling or Tapping Required!
• EZ-100 Mounting Bracket REQUIRED for use
