Reed Relays & Optocouplers | Introduction
Reed relays contain an electromagnetic coil and reed switch. When power is applied to the coil, the reed switch is activated. Reed relay applications continue grow every year despite severe competition from other small switching devices such as semiconductors and electromechanical armature style relays. Because the contacts in a reed relay are hermetically sealed, the contacts can switch low level signals as low as femtoamps and nanovolts. Reed relays are ideally used for switching applications requiring low and stable contact resistance, low capacitance, high insulation resistance, long life and small size. Choose from 100's of standard relays such as our ATEX approved reed relays, bistable reed relays, high frequency reed relays, high insulation reed relays, high voltage reed relays, latching reed relays, low thermal reed relays, surface mount reed relays, or custom reed relays for specialty requirements such as high RF switching, very high voltage switching, extremely low voltage or low current switching. Standex-Meder Electronics is now offering a line of optocoupler series that can safely handle
input/output isolation as high as 20,000 VDC that have met and been certified for the stringent requirements of ATEX (Directive 94/9/EC and 1999/92/EC). Our optocoupler series offer insulation resistances as high as 1013 ohms, operate in less than 10 μsec, and creepage distances from input to output are greater than 14.5 mm. These optocouplers essentially operate in all kinds of extremely hazardous, explosive, moist, dirty environments and operate from -40°C to 85°C. They also transfer their digital or analog signal information from input to output drawing no potentially hazardous arc. Optocouplers have no moving parts and operate safely for billions of operations, are not affected by magnetic fields and can operate or transfer information at a 50 kHz rate.