Svantek UK

Measurement Microphone MM 225

The 1/2 ”measurement microphone MM 225 opens up the possibility of using high quality, pre-polarized measurement microphone capsule MK 255 on measurement systems with phantom power.


Microtech Gefell


For more information on Measurement Microphone MM 225 or to request a quote, contact our team now:

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The electrical connection is made via a permanently connected, two-meter-long XLR cable.

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 type Capacitive pressure receiver, according to WS2F (DIN EN IEC 61094-4)
Operating transfer coefficient 50 mV / Pa
Operational transmission rate -26 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 3.5 Hz … 20 kHz, class 1 DIN EN 60 651
Polarization voltage 200 V
Limit sound pressure level for 3% harmonic distortion at 1 kHz > 138 dB
Output voltage ≤ 7.5 Veff at 1 kHz / 1% THD
Output impedance <100 ohms
Nominal terminating impedance 100 kOhm
Start-up time 1 min.
Equivalent noise level DIN EN 60651 15 dBA
Magnetic field influence 80 A / m, 50 Hz <22 dB
Influence of mechanical vibrations 1 m / s² 60 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 coefficient 1×10-5 dB / Pa
Moisture limits rH <100%, condensation not allowed
Temperature limits -50 ° C to +100 ° C
diameter with protective cap 13.2 + 0.05 mm
without protective cap 12.7 + 0.05 mm
Thread for preamplifier 11.7mm 60 US
Thread for protective cap 12.7mm 60 US
Connectors XLR
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!