Intensity Probes

Intensity Probes

The G.R.A.S. intensity probes comprise two closely spaced, face-to-face microphones and a set of 1/4-inch preamplifiers as well as a control handle. The 1/2-inch and 1/4-inch intensity microphone pairs have been carefully manufactured and selected to have minimum phase difference.
  1. 50GI CCP Intensity Probe
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 27 dB(A) to 146
    Sensitivity: 12.5 mV/Pa

    G.R.A.S. 50GI CCP Intensity Probe

    G.R.A.S. 50GI is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe. The small rugged 1/4" CCP preamplifiers ensure minimum disturbances to the sound field for accurate measurements in the full frequency range.

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  2. 50AI-B 1/2"  Intensity Probe
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-B 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-B Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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  3. 50VI-1 Vector intensity probe
    Freq range: IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VI-1 Vector intensity probe

    The G.R.A.S. 50VI-1 Vector Intensity Probe is a flexible and adjustable, two or three-dimensional sound-intensity probe. The probe handle has marked inputs for 3 pairs of preamplifiers (a pair for each of the mutually-perpendicular directions) and a 24-pin LEMO output socket at its base for connecting it to a suitable Power Module (e.g. Type 12AC) or Power Modules (via cable adapter).

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  4. 50VI-3 Wide-band intensity probe
    Freq range: IEC 61043
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VI-3 Wide-band intensity probe

    The G.R.A.S. Wide-band Intensity Probe Type 50VI-3 is a flexible and adjustable four-channel sound-intensity probe.

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  5. 50VX Intensity probe
    Freq range: IEC 61043
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50VX Intensity Probe Type

    The G.R.A.S. X-Y-Z Intensity Probe Type 50VX is a two-channel intensity probe for serially measuring a three-dimensional sound intensity vector in a stationary sound field. It includes a pair of phase-matched intensity microphones Type 40AI mounted on a pair of Preamplifiers Type 26AA with adapters and spacers. The whole assembly is mounted on a swivel head that can be swivelled in three mutually-perpendicular directions by means of a pair of slider buttons on the probe handle. The probe handle has inputs for 2 preamplifiers and a pair of LEDs for indicating two states as well as a pair of push buttons for interactive use with a remote-control system. For example, the output socket for remote control can be connected to the RS232 interface of a computer which controls the process of data acquisition. Learn More
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    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-C 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-C Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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  7. 50GI-RP CCP Rugged Intensity Probe
    Freq range: IEC 61043 Class 1
    Dyn range:
    Sensitivity:

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

    Type 50GI-RP is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe..

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  8. 50GI-P CCP Rugged Intensity Probe
    Freq range: IEC 61043
    Dyn range:
    Sensitivity:

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

    Type 50GI-P is a sound intensity probe for direct connection to signal analyzers or data acqusition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe..

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  9. 50GI-R Intensity Probe with Remote Control
    Freq range: IEC 61043 Class 1
    Dyn range:
    Sensitivity:

    G.R.A.S. 50GI-R CCP Intensity Probe with Remote Control

    The 50GI-R is a sound intensity probe for direct connection to signal analyzers or data acquisition devices with IEPE inputs. The probe includes a pair of phase-matched prepolarized precision microphones which meet the requirements in IEC standard 61043 for a class-1 intensity probe. The small rugged ¼" CCP preamplifiers ensure minimum disturbances to the sound field for accurate measurements in the full frequency range.

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  10. /
    Freq range: Ref. IEC 61043 Class 1
    Dyn range: 25 dB(A) to 152 dB
    Sensitivity: 25 mV/Pa

    G.R.A.S. 50AI-D 1/2" LEMO Intensity Probe

    The G.R.A.S. 50AI-D Sound-intensity Probe builds on more than 20 years of theory and practical experience in sound-intensity measurements. It is adjustable, durable and fully complies with the requirements in IEC 61043, Electroacoustics- Instruments for the Measurement of Sound Intensity- Measurements with Pairs of Pressure Sensing Microphones, 1993 for Class 1 Sound-intensity probes.

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