Hubbell offers both direct coupled or non-contact type switches for non-directional, directional, anti-plugging, plugging, under-speed, over-speed and zero-speed applications. Many enclosures are available in surface or flange mounting configurations with NEMA 3, 4, 7, 9, 10 or 13 construction.

Mod-Tronic is a supplier of speed switches and transmitters from Dynalco Controls. Offerings include the SW-100 with a single setpoint for over/underspeed protection. The SST-2000A and SST-2000H speed switches/transmitters receive signal input from an active or passive magnetic pickup, shaft encoder, flowmeter or contact closure to provide analog outputs.

Access Control Sales offers speed switch sensors from BWI Eagle. Their Tac Switch Series is a plug-in control unit that detects zero speed, overspeed or underspeed. The Eagle Optima Series comes in single, dual or triple channel configurations and also detects zero speed, overspeed or underspeed. They also offer intrinsically safe systems for hazardous locations, proportional speed monitors, and overspeed monitors.

Schulze offers the Jones heavy duty speed switch that protects equipment against overspeed and underspeed, activate electricla devices at specified RPM's, controls conveyor speeds, and provides quick, safe stops. These heavy duty speed switches feature extreme accuracy and repeatability within 1% of switch point RPM, regardless of direction of input shaft rotation.