RST4000-S is a 1/2 "capacitive high precision pressure field microphone especially for audio test. RST4000-S applies to pressure field acoustic measurement, it is a pre-polarization microphone, the back plate of the microphone is made of the special material, which can store a certain quantity of electric charge and make permanent electric field formed between diaphragm and back plate, does not require external polarization voltage in the using process.

Technical parameter

          ◆   Cartridge Type：                 Prepolarized condenser element, metal diaphragm
          ◆   Directional characteristic：     Omni-directional
          ◆   Nominal Sensitivity：            15mV/Pa，-36.5dB±1dB re 1V/Pa
          ◆   Dynamic Range：                  21-141dB
          ◆   Size
                    Diameter                    13.2mm with protection grid
                                                12.7mm without protection grid
                    Length                      12.9mm with protection grid
                               73mm total length（with preamplifier but without cable connector）
          ◆   Connector：                      BNC
          ◆   Accessories：                    BNC to BNC extension cable 
          ◆   Relative Humidity：              0-100%
          ◆   Temperature：                    -20℃-100℃

      Supporting Accessory

      RST4000-S Microphone can work conbination with PM2000-S Microphone power supply module (Figure 1).

Fig. 1  PM2000-S power module