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)