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.
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For more information on Measurement Microphone MMS 212 or to request a quote, contact our team now:
Request a QuoteContact usThe MMS 212 1/2“ measurement microphone set is designed for operating in extreme levels of temperature, humidity, dust and vibration. The ability to perform in the harshest of conditions is achieved by a skilful redesign of the protection grid, pressure compensation vent and connector.
Furthermore, quick and reliable measurements are facilitated by an integrated status LED confirms power-on, alerting the user to a sensor or cable failure.
Features include:
• Ruggedised
• LED status light
• IP67 including water-proofed connection
• Unique IEPE/CCP powered, externally polarised capsule
• TEDS
• Microtech Gefell 4010 calibrator recommended
| 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 | |
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