Electronic controller for differential pressure with permanently integrated pressure sensor and connections for pressure hoses (DN5 mm, provided by customer). Adjustable pressure ranges: 0-1000 Pa, 0-500 Pa, 0-300 Pa, 0-200 Pa. For continuous control of 1~ and 3~ EC fans or frequency converters with a setpoint input of 0-10 V DC. If the EC fan or frequency converter provides a supply voltage of 10-24 V DC/6 mA (safety extra-low voltage), the controller can be supplied directly from this, alternatively via a power supply unit (NG 24, accessory).