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Free field microphone CHZ-221


Quick Overview

The CHZ-221 is a free field microphone

Product specifications include: 8Hz to 12.5kHz | 1/2" | Free field


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  • Electret condenser sensor
  • High accuracy and stability
  • High dynamic range
  • CE and RoHS certificated
  • Low ambient-temperature coefficient
  • Nickel membrane


    Sensitivity (250Hz)40.0mV/Pa (at 250Hz, open-circuit, -28dB ±2dB ref. 1 V/Pa)
    Frequency range 8Hz to 12.5kHz ±2 dB 20Hz to 20kHz ±2 dB In accordance with IEC 651, Type 1 (0º incidence free-field)
    Dynamic range >140dB SPL within 3% distortion
    Response Free-field
    Non-linearity <0.5% of full scale
    Polarization voltage 0V
    Thermal noise <18.0dBA
    Pressure coefficient -0.01dB/kPa at 250Hz
    Temperature coefficient -0.01dB within the range of -10ºC and +50ºC
    Operating temperature -25ºC and +55ºC
    Operating humidity 0 to 98% RH (without condensation)
    Diameter 13.2mm (0.52”) with grid; 12.7mm (0.50”) without grid
    Height 17.2mm (0.68”) with grid; 16.0mm (0.63”) without grid
    Weight 9g
    Case material MONEL
    Mounting to amplifier 11.7mm - 60UNS
    Sensing element Electret condenser
    Pressure equalization Rear vent

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