When the 2 sensor connections come into contact with water, a relay is switched on. Thus sirens or pumps, etc. can be switched. Feature: The water sensors are charged with an extremely low voltage in order to prevent the otherwise usual oxidisation through galvanic currents.
Kemo4024028031583
Price: £11.99 from Conrad Electronic
| Stockist | Price | |
|---|---|---|
| £11.99 | Visit Store |
This unit uses ultrasonic echos. The LED lights lights up if a body approaches the Ultrasound sensor within 10 to 80 cm. Applications: Garage parking assistant · Person/animal alarm · Detecting objects on conveyor belts · Securing larger objects,...
For microphones and many other applications. This module is simply switched between a power amplifier and a weak signal source.
Switches on other devices with the built-in relay contact after pushing the button and automatically switches them off again after a set time. The time can be stopped any point by pressing the second button. Two push buttons are required for use.