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Measurement Microphone MM 203

The 1/2 ”measuring microphone MM 203 opens up the possibility of using a high quality, externally polarized measuring microphone capsule MK 221 on measuring systems with 7-pin. LEMO connection to be used.


For more information on Measurement Microphone MM 203 or to request a quote, contact our team now:


The electrical connection is made via a permanently connected, two-meter-long cable including a 7-pin LEMO connector. The preamplifier is equipped with a heating resistor that prevents possible condensation under extreme climatic conditions.

We recommend the MH 64 microphone holder with a 1/2 ”clamp to hold the microphone. The use of the 1/2 ”measuring microphone capsule accessories such as windshield, nose cone, dry adapter etc. is possible without any problems.

The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators.

Converter typeCapacitive pressure receiver, according to WS2F (DIN EN IEC 61094-4)
Operating transfer coefficient50 mV / Pa
Operational transmission rate-26 dB ± 1.5 dB re 1V / Pa
Free field correction for 1 kHz0 dB
Diffuse field correction for 1 kHz0 dB
Reference directionMicrophone axis
Frequency range of the free field transmission factor3.5 Hz … 20 kHz, class 1 DIN EN 60 651
Polarization voltage200 V
Limit sound pressure level for 3% harmonic distortion at 1 kHz146 dB
Nominal terminating impedance100 kOhm
Memory for microphone identification
Equivalent noise level DIN EN 6065115 dBA
Magnetic field influence 80 A / m, 50 Hz<22 dB
Influence of mechanical vibrations 1 m / s²60 dB (20 Hz to 1 kHz)
Working temperature range ˂ ± 0.5 dB-25 ° C to +100 ° C
Temperature coefficient≤ 0.01 dB / K
Static pressure coefficient1×10-5 dB / Pa
Temperature limits-50 ° C to +100 ° C
Moisture limitsrH <100%, condensation not allowed
diameterwith protective cap13.2 + 0.05 mm
without protective cap12.7 + 0.05 mm
Thread for preamplifier11.7mm 60 US
Thread for protective cap12.7mm 60 US
Connectors7-pin Lemo


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