Production line microphones

GRAS 40PM EQset™ is a short 20 kHz ¼″ pressure microphone with a dynamic range from 30 dB (A) to 120 dB SPL (<3% THD) and the same length (34 mm) as traditional production line microphones. Its fixed sensitivity, flat response curve across all frequencies, and high environmental stability make GRAS 40PM the ideal production line microphone. Learn more about the EQset Technology >>  

GRAS 40PM-1 is an upgraded version of GRAS 40PM EQset™. The GRAS 40PM-1 is a short 20 kHz ¼″ pressure microphone with a dynamic range from 30 dB (A) to 120 dB SPL (<3% THD) and the same length (34 mm) as traditional production line microphones. Its fixed sensitivity, flat response curve across all frequencies, and high environmental stability make GRAS 40PM-1 the ideal production line microphone. Learn more about the EQset Technology >>

The GRAS 40PO-L with EQset™ technology is a 1/4" high-frequency production line pressure microphone capable of conducting precise measurements up to 40 kHz. Designed for ease of use and environmental stability, it features EQset technology, which utilizes digital signal processing to maintain consistent sensitivity and a flat frequency response across all frequencies within strict tolerances. Unlike other production microphones, the 40PO-L incorporates a high-quality condenser measurement microphone capsule, ensuring high-precision and reliable testing up to 40 kHz. This innovative design provides exceptional environmental stability, setting the 40PO-L apart. It is ideal for measuring low sound pressure levels, while the GRAS 40PO-H, with its lower sensitivity, is suited for higher sound pressure level measurements.

The GRAS 40PO-H with EQset™ technology is a 1/4" high-frequency production line pressure microphone capable of conducting precise measurements up to 40 kHz. Designed for ease of use and environmental stability, it features EQset technology, which utilizes digital signal processing to maintain consistent sensitivity and a flat frequency response across all frequencies within strict tolerances. Unlike other production microphones, the 40PO-H incorporates a high-quality condenser measurement microphone capsule, ensuring high-precision and reliable testing up to 40 kHz. This innovative design provides exceptional environmental stability, setting the 40PO-H apart. It is ideal for measuring high sound pressure levels, while the GRAS 40PO-L, with its higher sensitivity, is suited for lower sound pressure level measurements.

The 40PK is a  free-field microphone for Quality Control and measurements in confined spaces. It has a wide frequency range reaching up to 20 kHz and a large dynamic range from <26 dB (A) to 145 dB.

The GRAS 40PP-10 Production-Line Test Microphone is a robust, cost-effective microphone designed for use in the production-line testing of loudspeakers and acoustic transducers. It has a wide frequency range reaching up to 20 kHz and a large dynamic range from <33 dB(A) to 128 dB.

The GRAS 40PP-10-S1 QC Microphone, High Pressure is a robust, cost-effective microphone designed for use in production-line testing of loudspeakers and acoustic transducers. It has a wide frequency range reaching up to 20 kHz and a large dynamic range from <33 dB(A) to 142 dB.

The 40PI is a 1/4" pressure microphone designed for precise measurements up to 20 kHz. It features a high-quality condenser capsule, ensuring exceptional environmental stability. Its compact design makes it an ideal choice for production line environments. Additionally, the 40PI includes a TEDS chip for quick channel adjustment and verification.