G.R.A.S. OP0025 Kit for Sensitivity Calibration of 1/4" Surface Microphones


For sensitivity calibration of 1/4" precision surface microphones, you will in addition to a Pistonphone, e.g. G.R.A.S. 42AP, need an adapter.

This kit contains an adapter for 1/4" size, which fits into the G.R.A.S. RA0048 1/2" coupler. This coupler is included with G.R.A.S. Pistonphones.

Performance & Warranty

G.R.A.S. accessories are made of stainless steel, alloys and high-quality composites. These items are covered by a 2 year warranty respecting their intended use.
On consumables like batteries, cables and windscreens we offer a 6 month warranty.

Included items


Pistonphone Calibration Adapter for 1/4" Surface Microphone Sets

G.R.A.S. Sound & Vibration reserves the right to change specifications and accessories without notice.