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

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

It enables sound intensity measurements using two different microphone spacers simultaneously to cover an extended frequency range. The spacers used with the Type 50VI-3 have lengths of 25 mm and 60 mm to cover a frequency range from 80 Hz to 6.3 kHz. The remote control output can, for example, be connected to an RS232 interface for computer control of the process of data acquisition. The Wide-band Intensity Probe Type 50VI-3 comprises two pairs of phase matched intensity microphones Type 40AI, two pairs of preamplifiers Type 26AA, 25 mm and 60 mm spacers, a 6-channel probe handle and a 5 m cable with LEMO connectors.

Frequency range (±2 dB) Hz IEC 61043
Dynamic range lower limit (microphone thermal noise) dB(A) 25
Dynamic range upper limit dB 152
Set sensitivity @ 250 Hz (±2 dB) mV/Pa 25
Polarization voltage V 200
Microphone venting Rear
Temperature range, operation °C / °F 5 to 40 / 41 to 104
Temperature coefficient @250 Hz dB/°C / dB/°F -0.01
Humidity range non condensing % RH 0 - 100
Humidity coefficient @250 Hz dB/% RH -0.001
Influence of axial vibration @1 m/s² dB re 20 µPa 66
Connector type 24-pin LEMO
CE/RoHS compliant/WEEE registered Yes/Yes/Yes
Weight g / oz 450 / 15.873

Included items

G.R.A.S. AA0020 10 m cable
G.R.A.S. AC0017 Y-cable adapter
G.R.A.S. AL0004 Small light weight microphone tripod

Optional accessories

G.R.A.S. 12AC 6-Channel Power Module for G.R.A.S. Vector-intensity Probe
G.R.A.S. AM0365 Windscreen for G.R.A.S. Vector-Intensity Probe