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Measurement microphone MMS 212

Measurement microphone MMS 212


The 1/2 “measuring microphone MMS 212 is very insensitive to extreme temperatures, humidity, dust and vibrations. This is achieved through a special design of the protective cap, pressure compensation opening and connector. The MMS 212 corresponds to protection class IP 67 and can be calibrated with standard 1/2 “sound calibrators. An integrated light element permanently shows the correct function and ensures reliable measurements.

Converter type Capacitive pressure receiver
Frequency range of the free field transmission factor 3.5 Hz to 20 kHz
Operating transfer coefficient 50 mV / Pa
Operational transmission factor re 1 V / Pa -26 dB ± 1.5 dB
Limit sound pressure level for 3% distortion factor at 1kHz Peak 139 dB
RMS 136 dB
Self-noise 15 dBA
Output impedance <100 ohms
Operating current 2 mA to 20 mA
Open circuit voltage of the power supply unit 24 V DC to 30 V DC
Working temperature range -40 ° C to +125 ° C
Storage temperature range -40 ° C to +80 ° C
Temperature coefficient at 250 Hz ≥0.01 dB / K
Static pressure coefficient at 250 Hz -0.00001 dB / Pa
Moisture limits rH <100%, condensation not allowed
diameter without protective cap 12.7 mm ± 0.05 mm
with protective cap 13.2 mm ± 0.05 mm
length 97 mm
Weight 45 g
Connectors BNC
Memory for microphone identification 256-bit 1-WireTM EEPROM
Protection class IP 67

MMS 212 datasheet

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