Shaft Speed Switches

Speed Switch Features

  • Under speed, over speed, zero speed or reverse detection
  • Rugged, Reliable Speed Switches for Hazardous Areas
  • Output Options
    • Relay Output
    • 4-20 mA Analog Output
    • DeviceNet
    • AS-Interface
  • Simple Installation and Calibration
  • Analog or Digital Electronics
  • Single or Multiple Setpoints
  • Failsafe Operation
  • Integrated or Discrete Sensor
  • Start Delay
  • Explosion Proof or Enclosure Install
  • Input Power (DC, AC)
  • Water Resistant and Explosion Proof Models

Speed Switch Overview

A speed switch senses rotating shaft speed, comparing it to one or more settable over/under/zero speed alarm trip-points. A shaft speed sensor detects magnets embedded in a shaft-mounted pulser wrap/disc. As the shaft rotates, the passing magnets are detected across an air-gap as pulses with frequency proportional to shaft RPM. When the pulse frequency (shaft RPM) crosses to the alarm side of a trip-point threshold, a corresponding relay de-energizes, indicating the alarm.  

Switch Applications
Zero Speed Switch - A switch used to determine if a rotating shaft comes to a complete stop.  
Overspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that exceed the determined setpoint.
Underspeed Detection - Utilizing a Speed Switch to monitor a shaft for speeds that fall below a desired setpoint.  
Reverse Speed Detection - The detection of a shaft which not only stops but begins to rotate backwards. 

Standard Speed Switch System Configurations

3-Piece System
Shaft Speed Switch + Shaft Speed Sensor + Shaft Speed Pulse Generator

2-Piece System
Shaft Speed Switch with Integrated Shaft Speed Sensor + Shaft Speed Pulse Generator

Products

M100T / M5000T

M100T / M5000T

Electro-Sensors Speed sensor and speed switch for detecting shaft slowdown, SPDT output relay, housed in a cast aluminum explosion proof enclosure.
Product Details
FB420

FB420

SPDT output relay and 4-20 mA output speed sensor and speed switch, housed in a explosion proof and NEMA 4X enclosure. Relay can be set for overspeed or underspeed. 24 VDC.
Product Details
DR1000

DR1000

The DR1000 is a shaft speed switch with DPDT output relay to detect shaft slowdown or stoppage. The DR1000 is housed in an explosion-proof and waterproof cast aluminum enclosure.
Product Details
LRB1000 / LRB2000

LRB1000 / LRB2000

Speed Switch with one or two adjustable SPDT setpoint relays to detect over-speed, under-speed, or stoppage. Built-in start delay and signal loss protection. Housed in a NEMA 1 enclosure.
Product Details
SCP1000 / SCP2000

SCP1000 / SCP2000

Self-contained, presettable sensor and speed switch with one or two adjustable SPDT or DPDT setpoint relays to detect over-speed or under-speed. Built-in start delay. Housed in a cast aluminum explosion proof enclosure.
Product Details
UDS1000

UDS1000

Reverse shaft rotation detector with DPDT output relay. Automatically resets when reverse motion stops. Housed in a cast aluminum explosion proof enclosure.
Product Details
SS110

SS110

One adjustable SPDT output relay for detecting shaft speed in super slow speed applications. Built-in start delay. Housed in a NEMA 1 enclosure.
Product Details
PVC100/5000

PVC100/5000

The PVC100 is a smaller speed switch with a PVC housing. This switch is optimal for applications with cramped spaces and no Explosion-Proof requirement.
Product Details
SpeedTalker-DN(UI)

SpeedTalker-DN(UI)

Universal-Input Shaft Speed measurement with alarms (Shaft Speed Switch) and DeviceNet network interface
Product Details
OEM Switch DMS100/5000

OEM Switch DMS100/5000

The DMS speed switch is an economical choice housed in a compact plastic enclosure, it mounts on a standard 35 mm DIN rail and operates on 115/230 VAC with optional DC units available.
Product Details
M100/5000 (For Replacement Purposes Only)

M100/5000 (For Replacement Purposes Only)

Self-contained sensor and speed switch for detecting shaft slowdown, SPDT relay output, housed in an explosion proof cast aluminum or a corrosion-resistant PVC enclosure.
Product Details