Outdoor microphone

Nor1218

Outdoor microphone protection

The Nor1218 is an IEPE outdoor microphone protection designed for semi‑permanent installations in environmental and industrial noise monitoring.

It is powered directly from, and fully supported by, the Nor131 and Nor139 sound level meters. By using the standard preamplifier and microphone supplied with these instruments, the Nor1218 provides a practical and cost‑efficient solution for reliable outdoor measurements.

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Features

Standards

Specifications

Accessories

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Features

IEPE Outdoor microphone for semi-permanent installations.
Outdoor microphone for community and aircraft noise.
Directly powered and supported by Nor131 or Nor139 (built in selectable frequency correction networks).
Fulfils IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1.
Protection class IP 55 (dust and water).
Easy to calibrate with a normal ½” sound calibrator.
Low self noise – typically below 18 dB, A-weighted.
Low cost – uses microphone and preamplifier supplied with Nor131 or Nor139 .
Supplied with a accredited calibration certificate.

Standards

IEC 60651
IEC 61672
ANSI S1.4 type 1

Specifications

Acoustic performance: IEC 60651, IEC 61672 class 1 and ANSI S1.4 type 1 (frequency correction applied) with a suitable instrument (Nor131/Nor139).
Max sound pressure level: >140 dB peak dependent on supply voltage.
Microphone cartridge: Nor1227 or Nor1228 (1/2” 50 mV/Pa)
Polarization voltage: 0 volt
Inherent noise: < 18 dB A-weighted
Reference direction: Vertical or horizontal dependent on the applied frequency correction
Ingress Protection Category: IP55 according to IEC 60529.
Supply voltage: IEPE
Power consumption: 30 mW (dependent on supplied current)
Connector: TNC
Temperature range: -40ºC to +85ºC
Height: 375 mm / 14.8”(1” pipe mounting), 450 mm / 17,7” with tripod adaptor
Diameter: Approx 80 mm / 3.1” (with windshield)
Weight: Approx 300 g (with preamp microphone)
Mounting thread: Standard 1” pipe threads according to ISO 228. When using the tripod adapter: 3/8” UNC.