GRAS 50GI-P CCP Rugged Intensity Probe

Freq range: IEC 61043 Class 1
Dyn range: 27 dB(A) to 146 dB
Sensitivity: 12.5 mV/Pa

GRAS 50GI-P CCP Rugged Intensity Probe


Typical applications and use

  • Sound intensity measurements
  • Sound source location
  • Sound power measurements
  • IEC 61043 standard measurements
  • Sound source ranking
  • Sound intensity mapping


The probe set includes solid interchangeable spacers for microphone separations from 12 mm to 50 mm so that the probe can cover the frequency range from 100 Hz to 10 kHz.

All components are made specifically for sound intensity applications. Each small ¼" diameter by 40 mm long microphone preamplifier is housed in a robust stainless steel casing. The probe head is symmetrical which enables reliable calibrations as described in the proposed standard (ISO/DIS 9614-2) for sound power measurements using sound intensity measurements.

The GRAS 50GI-P CCP Intensity Probe comprises a 40GK-S1 sound Intensity Microphone Pair, two 26CC CCP Microphone Preamplifiers, three solid spacers of various lengths, windscreen and a probe handle.

The 50GI-P is delivered in a carrying case as a ready-to-use kit, complete with all the above accessories.

The microphones are ½" free-field prepolarized microphones with a uniquely-designed pressure equalisation system, which ensures extremely well defined phase characteristics.

The microphones and preamplifiers are mounted on a swivel head on the telescopic arm of the handle. To cover the frequency range from 100 Hz to 10 kHz, the 50GI-P probe is delivered with three solid spacers for spacing the microphones at 12 mm, 25 mm, and 50 mm. These spacers can be easily interchanged without dismantling the probe.


0 V / CCP
Frequency range (±2 dB)
IEC 61043
IEC 61094-4 Compliance
CE/RoHS compliant/WEEE registered
g / oz
400 / 14.110

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

Ordering info


GRAS RA0213 Rugged Probe Head
GRAS 40GK ½'' Intensity Microphone Set
GRAS 26CC ¼″ CCP Preamplifier set
GRAS AA0068 25 cm Cable SMB angled - Microdot
GRAS AA0070 Microdot-BNC cable, Temperature max. 70 °C
GRAS AI0044 Probe handle
GRAS AM0376 Windscreen


GRAS 51AB Phase Calibrator according to IEC 61043
GRAS 42AP Intelligent Pistonphone, Class 0
GRAS 51AC Sound Intensity Calibration Kit for 50AI-LP

GRAS Sound & Vibration reserves the right to change specifications and accessories without notice.

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