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.

Process Control Systems manufacutures the Maxigard brand of industrial products designed to monitor bucket elevators, belt conveyors, screw conveyors and other types of processing and material handling equipment. Adjustable speed switches are offered in single set point and dual set point to detect the slowing of the fan shaft caused by the drive belt slipping. Their zero speed switch is typically used to moitor a rotary airlock and screw conveyor.

Protocontrol is a manufacturer and exporter of safety switches for material handling plants. They offer zero speed switches (conveyor safety switches) and inductive proximity switches (industrial sensors for sensing position and speed).

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.

Torq Corporation manufactures electronic speed switches, zero speed switches, and mechanical speed switches. Electronic and zero speed switches come in either standard or hazardous location models. The Torq mechanical speed switch is used in bulk material handling/processing systems to monitor speeds of conveyors, elevators, feeder shafts and drums.