Solid state relays (SSR) or semiconductor relays are semiconductor devices that can be used in place of mechanical relays to switch electricity to a load in many applications

High voltage relays are used to transfer power for high voltage and high frequency applications. They are heavily insulated and consist of strong materials to increase contact life

Electromechanical relays are devices that complete or interrupt a circuit by physically moving electrical contacts into contact with each other

Reed relays are electrically-operated switching devices that consist of two thin, magnetic strips (reeds) encapsulated in a glass envelope. They are used to switch industrial components such as solenoids, contactors and starter motors

VME switches and VXI switches are used in industrial systems to connect test points, or devices, to instruments for the purpose of testing, measuring or monitoring the system

Safety relays and control modules differ from conventional relays in that they have force-guided or positive-driven contacts

Liquid level switches are used to detect specific liquid levels or interfaces between liquids. These level measurements are indicated via an electrical switching action

Protective relays and monitoring relays detect or monitor for abnormal power system conditions

Time delay relays and solid state timers use solid state electronic devices to provide a time delay

Relay sockets are devices that accept relays, electromechanical switches in which the variation of current in one electric circuit controls the flow of electricity in another circuit

Relay boards (multiple relay modules) are computer boards with an array of relays and switches. They have input and output terminals and are designed to control the voltage supply

Pneumatic relays and volume boosters control output air flow and pressure in response to a pneumatic input signal. They can perform simple functions such as boosting or scaling the output, or use complex reversal, biasing, and math function operators

Reed switches are magnetically actuated switches. They are typically manufactured with two ferromagnetic reeds (contact blades), which are sealed in a glass capsule. In the presence of a magnet, the blades (contacts) close. 

Specialty relays and accessories are specialty or proprietary products and accessories related to relays

CompactPCI switches and PXI switches are used in industrial systems to connect test points or devices to instruments for the purpose of testing, measuring or monitoring the system