Microtech Gefell MTG MMS 214 ultra low noise microphone 6.5dB(A)

The MMS 214 has a particularly low inherent noise level and is designed for acoustic measurements of very low sound pressure levels. The electrical connection is via BNC cables to measuring channels with IEPE supply. The polarisation voltage for the externally polarised measuring microphone capsule is generated in the measuring microphone preamplifier. The measuring microphone is equipped with a built-in memory for microphone identification (TEDS according to IEEE 1451).  

technical data

Transducer type    Capacitive pressure transducer

Frequency range of the free field response    ±2 dB    10 Hz bis 16 kHz ± 3dB    5 Hz to 20 kHz

Sensitivity    320 mV/Pa

Sensitivity re 1 V/Pa    -10 dB ±2.5 dB

Max. SPL for 3% THD at 1 kHz    Peak    103 dB RMS    100 dB

Inherent noise    6.5 dBA

Output impedance    <100 Ohm

Current consumption    4 mA to 20 mA

Power supply voltage    24 V DC to 30 V DC

Operating temperature range    -20 °C bis +60 °C

Temperature coefficient at 250 Hz    ≥0.01 dB/K

Static pressure coefficient at 250 Hz    -0.00001 dB/Pa

Temperature limits    -50 °C to +100 °C

Humidity limits    r.H. <100%, absence of condensation

Diameter    without protection grid    12.7mm ± 0.05mm with protection grid    13.2mm ± 0.05mm

Length    135 mm

Weight    250 g

Plug    BNC

Microphone identification memory    256-Bit 1-WireTM EEPROM (DS 2430 AP)