Through-beam Model 7851 detects targets up to 20 in away using 360 kHz ultrasonic wave frequency It maintains 10 x 30 mm resolution and response time of 10 msec Powered by 24 Vdc sensor has NPN or PNP outputs rated 100 mA Red and green LEDs... Learn more

Universal Power Alert Model UPA-100 takes guesswork out of determining presence of power in panels and eliminates injury or fatality OSHA-compliant monitor detects and indicates single-/3-phase ac voltage (40-750 Vac) and dc or stored energy... Learn more