| Converter type | Capacitive pressure receiver | |
| Frequency range | 5 Hz to 100 kHz (± 2 dB) | |
| Idle transmission coefficient | 3.5 mV / Pa | |
| No-load transmission factor re 1 V / Pa | -49 dB ± 1.5 dB re 1V / Pa | |
| Limit sound pressure level for 3% harmonic distortion at 1 kHz | 168 dB | |
| Self-noise with preamplifier MV 203 | 36 dBA | |
| Polarization voltage | 0 V | |
| Capacity at 1 kHz | 4.5 pF | |
| Working temperature range | – 20 ° C to +100 ° C | |
| Temperature coefficient | ≤ 0.01 dB / K | |
| Static pressure coefficient | -1 x 10⁻⁵ dB / Pa | |
| diameter | without protective cap | 6.35 mm ± 0.02 mm |
| with protective cap | 7.0 mm ± 0.02 mm | |
| height | 9.7 mm | |
| Weight | 2 g | |
| Thread for preamplifier | 5.7mm 60 US | |
| Thread for protective cap | 6.35mm 60 US | |
Measuring Microphone Capsule MK 301 E
The 1/4 ”measuring microphone capsule MK 301 E is designed for acoustic measurements in research, development and industry and is also used in building acoustics and audiometry.
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The measuring microphone capsule has a fixed charge-carrier layer (back electret) to provide the polarization voltage.
The careful construction and the constructive concept of the microphone capsule guarantee a high temporal constancy of the electroacoustic parameters. All important parts, including the membrane manufactured and fixed in a special galvanic process, are made of nickel. The membrane is protected from mechanical damage by a protective cap. The static pressure equalization between the inner cavity and the atmosphere is ensured via a capillary to the downstream preamplifier.
The internationally common thread type (60 UNS) for connecting the microphone capsule allows interchangeability with other 1/4 “microphone capsules and enables connection to all suitable 1/4” or 1/2 “calibration and measuring devices.
The MK 301 measuring microphone capsule is suitable for class 1 sound level meters according to IEC 61672.
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