Nor1290-sound-intenisty-probe-white-(664x664px)

Microphones/preamplifiers

Nor1290

Sound intensity probe

The Nor1290 probe kit is a lightweight, rugged solution for acoustic measurements in demanding and rough environments.

With a smartphone running the NorVirtual App mounted directly on the probe, it enables true single-hand operation and provides the same intuitive measurement views as the Nor150 sound analyser.

The remote measurement system remains fully synchronised with your instrument, supporting efficient field measurements, reliable data acquisition, and smooth operation in applications where mobility, durability, and precision are essential.

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Ergonomic angle adjustment for precise positioning

The probe head features two ergonomic adjustment knobs. The upper knob is used to compensate for spacer distance and centre displacement, while the lower knob securely locks the probe at the desired angle. The angular adjustment includes clearly defined mechanical steps to support repeatable and precise positioning.

Flexible connection options for efficient setup

The detachable probe head is fitted with a standard 7-pin LEMO connector with secure screw-lock fastening. It can be connected directly to the top of the Nor150, extended using a standard microphone cable, or mounted on the probe handle rod. This flexible configuration capability helps you adapt the system to each measurement task while keeping the need for additional accessories, such as extra extension cables, to a minimum.

Nor1290 probe kit content

Specifications

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Nor1290 probe kit content

Nor1290 adjustable sound intensity probe head.
Two phase‑matched GRAS 40GI ½" pre‑polarised microphones.
90° angular adapter for ½" to ¼" configuration.
Two impedance‑matched GRAS 26CC ¼" CCP preamplifiers.
Probe handle with integrated smartphone mount.
Lightweight 1 m carbon fibre extension rod with LEMO connectors.
Nor1294 Phase Verification Coupler for on-site verification.
Windscreen for reliable outdoor and draft-affected measurements.
Complete spacer set for different measurement distance.
2 m extension cable for flexible probe positioning.
Robust two-level hard case with dedicated space for all components listed above, plus Nor150, power adapter, and SPL calibrator Nor1255/Nor1256.

Specifications

Frequency range (±2 dB): Ref. IEC 61043 Class 1
Dynamic range lower limit (microphone thermal noise): 27 dB(A)
Dynamic range upper limit: 146 dB
Nominal sensitivity @ 250 Hz (±2 dB): 12.5 mV/Pa
Microphone type: 1/2” Rear vented
Prepolarised Preamplifier: 1/4” IEPE powered
Temperature range, operation: 5 to 40 °C / 41 to 104 °F
Temperature coefficient @250 Hz: -0.01 dB/°C / -0.006 dB/°F
Humidity range non condensing: 0 – 100 % RH
Humidity coefficient @250 Hz: -0.001 dB/% RH
Influence of axial vibration @1 m/s²: 66 dB re 20 µPa
Spacers included: 12, 25, 50, 100 mm
Cable length: 2 m
Connector type: 7 pin Lemo
CE/RoHS compliant/ WEEE registered: Yes