Reference calibrator

GRAS 42AA Pistonphone, Class 1

Sound pressure level: 114 dB
Frequency: 250 Hz
IEC: 60942

GRAS 42AA Pistonphone, Class 1

The GRAS Pistonphone 42AA is a battery-operated, precision sound source for accurate and reliable calibration of measurement microphones, sound level meters, and other sound measuring equipment...

GRAS 42AC Pistonphone, high pressure, Class 1

Sound pressure level: 134 dB
Frequency: 250 Hz
ANSI: S1.40
IEC: 60942

GRAS 42AC Pistonphone, high pressure, Class 1

The GRAS 42AC Pistonphone, high pressure is a precision sound source for calibrating microphones. It is battery operated and produces a constant sound pressure level of 134 dB re. 20µPa (equivalent to 100 Pa) at 250 Hz, or 125.4 dBA re. 20µPa. ..

GRAS 42AP Intelligent Pistonphone, Class 0

Sound pressure level: 114 dB
Frequency: 250 or 251.2 Hz
ANSI: S1.40
IEC: 60942, Class 0

GRAS 42AP Intelligent Pistonphone, Class 0

The GRAS 42AP Pistonphone is a battery-operated, precision sound source for accurate and reliable calibration of measurement microphones, sound level meters and other sound measuring equipment...

GRAS 51AC Sound Intensity Calibration Kit

Standard: IEC 61043
Special feature: Calibration coupler with two matched calibration chambers for GRAS Rugged Intensity Probes.

GRAS 51AC Sound Intensity Calibration Kit

The 51AC Sound Intensity Calibration Kit is a ready to use kit for sensitivity and phase calibration of GRAS Rugged Intensity Probes (50AI-LP, 50GI-P, 50GI-RP). The kit consists of a calibration adapter with two calibration chambers, a GRAS 42AA Pistonphone, Class 1, and a GRAS ZC0002K Barometer...

GRAS 51AC-S1 Sound Intensity Calibration Adapter for 50AI-LP

Standard: IEC 61043
Special feature: Calibration coupler with two matched calibration chambers for the 50AI-LP Rugged Intensity Probe.

GRAS 51AC-S1 Sound Intensity Calibration Adapter for 50AI-LP

The 51AC-S1 Sound Intensity Calibration Adapter is a calibration adapter for sensitivity and phase calibration of the GRAS 50AI-LP CCP Rugged Intensity Probe...