Svantek UK

Measurement Microphone MM 302

The 1/4 ”measuring microphone MM 302 opens up the possibility of using high quality, externally polarized measuring microphone capsule MK 301 on measuring systems with 7-pin. LEMO connection to be used.


Microtech Gefell


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The electrical connection is made via a permanently connected, three-meter-long cable including a 7-pin LEMO connector.

The MH 64 microphone holder with a 1/4 ”cone is recommended for holding the microphone. The use of the 1/4 ”measuring microphone capsule accessories, such as a windshield etc., is possible without any problems.

The measurement microphone can be calibrated with the Pistonfon Type 5002 or with other suitable sound pressure calibrators using a 1/4 “adapter.

Converter type Capacitive pressure receiver, according to WS3F (DIN EN IEC 61094-4)
Operating transfer coefficient 5 mV / Pa
Operational transmission rate -46 dB ± 1.5 dB re 1V / Pa
Free field correction for 1 kHz 0 dB
Diffuse field correction for 1 kHz 0 dB
Reference direction Microphone axis
Frequency range of the free field transmission factor 5 Hz to 100 kHz (± 2 dB)
Polarization voltage 200 V
Limit sound pressure level for 3% harmonic distortion at 1 kHz 168 dB
Limit sound pressure level with reduced no-load supply voltage (UL = 28 V DC) 157 dB
Output voltage ≤ 35 Veff
Output impedance <100 ohms
Nominal terminating impedance 100 kOhm
Start-up time 1 min.
Equivalent noise level DIN EN 60651 35 dBA
Magnetic field influence 80 A / m, 50 Hz
Influence of mechanical vibrations 1 m / s²
Working temperature range ˂ ± 0.5 dB -25 ° C to +100 ° C
Moisture limits rH <100%, condensation not allowed
Temperature coefficient ≤ 0.01 dB / K
Static pressure coefficient 1×10-5 dB / Pa
Temperature limits -50 ° C to +100 ° C
diameter with protective cap 6.35 mm ± 0.02 mm
without protective cap 7.0 mm ± 0.02 mm
Thread for preamplifier 5.7mm 60 US
Thread for protective cap 6.35mm 60 US
Connectors 7pol. Lemo
Memory for microphone identification


We are all set up and ready to meet people at the Instrumentation, Analysis & Testing Exhibition! Come and see us for live demos of the NoisePAD from Sinus, the SVAN 977 from Svantek and the Voyager from Microflown!