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New MV 205 1/2" Measuring Microphone Preamplifier - climate proof, because of controlled heating

2020-06-18 07:56:39, Microtech Gefell GmbH

The low output impedance allows high dynamic range even with long connection cables. Controlled heating prevents possible condensation under extreme climatic conditions. Adapters can be used to operate externally polarized 1" capsules and externally polarized 1/4" capsules. The capsule connection complies with the international standard IEC 61094. The preamplifier is suitable for sound level meters (class 1 according to IEC 61672) and can be optimally combined with the new MK 255 capsule and the MN 921 power supply unit. MK 255 - 1/2" stainless steel measuring microphone capsule The capsule is designed for R&D, industry, including building acoustics and audiometry. A fixed charge carrier layer (backelectret) provides the necessary polarization voltage. The concept guarantees high temporal constancy of the electroacoustic parameters. The counter electrode (carrier of the electrets layer) is isolated from the housing by a quartz glass pane. The protective cap protects the membrane from mechanical damage. MN 921 - Measuring microphone amplifier with power supply for conventional measuring microphones (7-pin LEMO) and IEPE microphones (with adapter) The MN 921 is a 1-channel power supply for measuring microphones with a precision amplifier with variable gain is connected. It adapts the dynamic range of the measurement signal to the dynamic range of the subsequent evaluation unit. The MN 921 generates all necessary voltages for a condenser measuring microphone (preamplifier operating voltage, polarization voltage and, if necessary, heating voltage/optionally by batteries, accumulators or mains). These voltages are completely galvanically isolated (no mains hum in the output signal) and available at the LEMO socket (MIC). The operating voltage output (120 V) for the short-circuit-proof, the polarization voltage is precisely regulated to ± 0.1 V. For permanently polarized measuring microphones, the polarization voltage can be switched off.

Products & Services

Item number: Reference - 302116

MN 921 - measuring microphone amplifier with power supply for conventional measuring microphones (7-pin LEMO) and IEPE* microphones (with adapter)

Microtech Gefell GmbH

Item number: Reference - 301206

New MV 205 1/2" Measuring Microphone Preamplifier - climate proof, because of controlled heating

Products & Services

MN 921 - measuring microphone amplifier with power supply for conventional measuring microphones (7-pin LEMO) and IEPE* microphones (with adapter)

Microtech Gefell GmbH

MV 205 - high impedance preamplifier for externally polarized 1/2\" capsules in weatherproof measuring microphone units

Microtech Gefell GmbH

MK 255 Condenser measuring capsule with permanent polarization

Microtech Gefell GmbH