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Measurement capsule pair MK 390 E

Measurement capsule pair MK 390 E

Measurement capsule pair MK 390 E

Product catalog summary
Overview
The MK 301 E is a 1/4” condenser measuring microphone cartridge designed for acoustical measurements in research, development, and industrial applications, including audiology and building acoustics. It features a frequency range of 5 Hz to 100 kHz and can handle sound pressure levels up to 158 dB.
Specifications
  • Transducer Type: Capacitive pressure transducer
  • Frequency Range: 5 Hz to 100 kHz (± 2 dB)
  • Sensitivity: 4 mV/Pa
  • Max SPL for THD ≤ 3% at 1 kHz: 158 dB
  • Inherent Noise with Preamplifier MV 310: 36 dBA
  • Polarization: Backelectret
  • Capacitance at 1 kHz: 4.5 pF
  • Operating Temperature Range: -20 to +100 °C
  • Humidity: Up to 70 °C, 90%
  • Temperature Coefficient: ≤ 0.01 dB/K
  • Pressure Coefficient: -1x10-5 dB/Pa
  • Dimensions: Diameter with protection grid 7.0 ± 0.02 mm, without 6.35 ± 0.02 mm; Height 9.7 mm
  • Weight: 2 g
  • Thread for Preamplifier: 5.7 mm 60 UNS
  • Thread for Protection Grid: 6.35 mm 60 UNS
Design and Construction
The microphone cartridge includes a fixed backelectret layer for polarization voltage. It is constructed with nickel components, including a diaphragm bonded by a special galvanic process. The diaphragm is protected by a grid, and a quartz glass plate insulates the rear electrode from the housing. Static air pressure equalization is achieved via a side-vented capillary tube.
Compatibility
The MK 301 E uses an international standard thread (60 UNS), ensuring compatibility with various calibration and measurement devices.
Maintenance
To maintain functionality, the microphone should be protected from mechanical damage and checked for pollution at regular intervals. Cleaning should be done carefully with a soft cloth or brush. It is not suitable for chemically aggressive environments or conductive dust, and condensation must be avoided.
Delivery
The MK 301 E is delivered in a wooden case with Order-No. 311111.
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Catalog excerpts

Measurement capsule pair MK 390 E-1

Kondensator-Messmikrofonkapsel MK 301 E Die 1/4” Messmikrofonkapsel MK 301 E ist für akustische Messungen in Forschung, Entwicklung und Industrie konzipiert und wird unter anderem auch in der Bauakustik und der Audiometrie eingesetzt. Frequenzbereich 5 Hz bis 100 kHz, Freifeld Die Messmikrofonkapsel verfügt über eine fixierte Ladungsträgerschicht (Backelektret) zur Bereitstellung der Polarisationsspannung. Der sorgfältige Aufbau und das konstruktive Konzept der Mikrofonkapsel garantieren eine hohe zeitliche Konstanz der elektroakustischen Parameter. Alle wichtigen Teile, einschließlich der in einem speziellen galvanischen Verfahren hergestellten und befestigten Membran, bestehen aus Nickel. Die Membran ist durch eine Schutzkappe vor mechanischen Beschädigungen geschützt. Der statische Druckausgleich zwischen dem inneren Hohlraum und der Atmosphäre wird über eine seitliche Kapillare gewährleistet. Zur einfachen Kontrolle des Druckfrequenzganges kann ein separates Eichgitter verwendet werden, z.B. UA 0033 mit DB 0264. Der international übliche Gewindetyp (60 UNS) für den Anschluss der Mikrofonkapsel gestattet die Austauschbarkeit mit anderen 1/4” Mikrofonkapseln und ermöglicht den Anschluss an alle geeigneten 1/4” bzw. 1/2” Kalibrier- und Messgeräte. Condenser Measuring Microphone Cartridge Type MK 301 E The 1/4” measuring microphone cartridge MK 301 E is designed for acoustical measurements in research and development and also for industrial use. Some applications include audiology, the measurement of building acoustics and noise levels. Frequency range 5 Hz to 100 kHz, free-field Sound pressure levels up to 158 dB The microphone cartridge has a fixed layer of backelectret to supply the polarization voltage. It is designed and very carefully constructed to ensure excellent long-time stability of the electroacoustical parameters. All essential components including the diaphragm are made of nickel and the diaphragm is bonded by a special galvanic process. The rear electrode is insulated from the cartridge housing by a quartz glass plate. The diaphragm is protected against mechanical damage by a protection grid in which an insulated calibration grid is integrated. The equalization of the static air pressure between the inside and outside of the MK 301 E cartridge is by means of a capillary tube side-vented. The individual pressure frequency response curves can be convenient measured by using a calibration grid. e.g. UA 0033 by means of the adaptor DB 0264. The cartridge uses the international standard thread 60 UNS which ensures compatibility with a wide range of calibration equipment and measurement devices available from many manufactures. Lieferumfang/ Delivery Messmikrofonkapsel Measuring Microphone Cartridge MK 301 E im Holzetui MK 301 E in wooden case

 Open the catalog to page 1
Measurement capsule pair MK 390 E-2

Technische Daten/ Specifications MK 301 E Wandlertyp Transducer type Frequenzbereich des Freifeldübertragungsmaßes Frequency range free-field response Feld-Leerlauf-Übertragungsfaktor/ Sensitivity Grenzschalldruckpegel für 3 % Klirrfaktor bei 1 kHz Max. SPL for THD ≤ 3 % at 1 kHz Eigenrauschen mit Vorverstärker MV 310 Inherent noise with preamplifier MV 310 Polarisationsspannung/ Polarization Kapazität mit Polarisationsspannung bei 1 kHz Polarized cartridge capacitance at 1 kHz Kapazitativer Druckempfänger Capacitive pressure transducer 5 Hz … 100 kHz (± 2 dB) 4 mV/ Pa 158 dB 36 dBA backelectret...

 Open the catalog to page 2

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.