piezo buzzer

... potential-free switching output, changeover, 250V/2.5A Warning light: 1 potential-free switching output, changeover, 250V/2.5A, pulsed/static Siren: 1 potential-free normally closed contact, 250V/2.5A, resettable Device fault: 1 potential-free changeover contact, 250V/2.5A Displays: LED display for operational, alarm, and fault messages First alarm display as a flashing alarm LED Other: Key switch for alarm lockout, built-in piezo buzzer, self-monitoring, line monitoring, cold start false alarm suppression, Power supply: 230V/50/60Hz and/or 24VDC, 110V AC available on request...

... cable with a Schuko plug. Features: • Reduced power consumption due to electronic holding current reduction • Prevention of valve internal parts from seizing through automatic daily valve closing pulse • Nominal diameters from DN10 to DN50 • Connections G1/2 to G2 • Piezo buzzer alarm • LED operating voltage indicator • Drinking water approval available upon request Function: After switching on the mains voltage, the electronics open the solenoid valve. The sensor detects a water film of approximately 0.5 mm and sends a signal to the control electronics. The valve is then closed.

...Gas detection device with up to 3 gas sensors self-monitoring, 1-, 2-, or 3-stage pre-alarm and main alarm with LED gas level display built-in loud piezo buzzer optical alarm display, adjustable potentiometer, and test button, built into a plastic wall housing with a clear door Measuring range: depending on gas type Connection voltage: 24V DC/AC, 230 V 50 Hz Output: 1 potential-free contact per limit value Protection class: device IP 65, sensor IP 53...