The GRAS 50AI has been withdrawn, the following information is for reference purposes
The 50AI is durable and easy to use probe that fully complies with the requirements of IEC 1043 for Class 1 sound intensity probes. Early probes used existing microphones preamplifiers etc., but this generation uses new components and microphones with inherent relative phase accuracy through a newly designed venting system.
The GRAS sound intensity probe includes a set of 1/2" intensity microphones type 40AI, with spacers, adaptors, preamplifiers and a remote control handle to control the complete data acquisition process from the probe handle.
Delivered with 8 mm, 12 mm, 25 mm, 50 mm and 100 mm spacers which may be interchanged without dismantling the probe, our probe has built in control and direct connection for the Norsonic 840 real time - intensity analyser.
For direct use with the Nor 840 real time / intensity analyser.
The matched sound intensity microphone kit may be hired separately - see below
GRAS 40AK : Sound Intensity Microphone Set
£ 12 a day *
The 40AK set includes two phase matched 1/2" intensity microphones, spacers and 1/4" preamplifier adaptors.
The microphones have a free field response optimised for use in face to face configuration intensity probes and have high sensitivity to enable low level measurements.
The pair of microphones full fill the phase requirements for Class 1 intensity microphones, according to IEC Draft International Standard 1043.
The 40AK set includes solid spacers for intensity probe configurations with 8 mm, 12 mm, 25 mm, 50 mm and 100 mm microphone separation to cover the full frequency range from 50 Hz up to 10 kHz, even under the most adverse measurement conditions.