Nor1209 1/2" Microphone Preamplifier

The Nor1209 is a standard 1/2" microphone preamplifier designed for applications requiring a separate, externally mounted preamplifier connected to the sound level meter or analyser via extension cable. Unlike insert-type preamplifiers that mount directly into the instrument body, the Nor1209 connects via a standard LEMO 7-pin cable, enabling flexible positioning of the microphone at a distance from the analyser for remote measurement configurations. With a self-noise below 2.5 µV and high input impedance exceeding 10 GΩ, the Nor1209 delivers measurement performance equivalent to the Nor1203 insert preamplifier while offering the mechanical flexibility needed for permanent installations, tripod-mounted measurements, and configurations where the instrument body must be separated from the microphone location. The preamplifier supports 200 V external polarization for condenser microphones and is compatible with all Norsonic 1/2" microphones. The Nor1209 is essential for noise monitoring terminals such as the Nor1545, where the microphone is mounted on a mast or pole at a height specified by measurement standards while the analyser is housed in a weather-protected enclosure at ground level. For permanent environmental monitoring stations, airport noise monitoring systems, and construction site noise monitoring installations across the GCC, the Nor1209 provides the reliable low-noise signal path required for accurate long-term unattended measurements with cable lengths up to 100 metres.