G.R.A.S 50GI-P CCP Rugged Intensity Probe

Freq range: IEC 61043 Class 1
Dyn range: 27 dB(A) to 163 dB
Sensitivity: 12.5 mV/Pa

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 G.R.A.S. 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.

Frequency range (±2 dB) Hz IEC 61043
CE/RoHS compliant/WEEE registered Yes/Yes/Yes
Weight g / oz 400 / 14.110


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


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