Profile: Cirrus Research PLC is engaged in the production of noise measurement instrumentation. We specialize in offering sound level meters and personal noise dosimeters. Our personal noise dosimeters are designed for the measurement of personal noise exposure, occupational noise and industrial noises. Our class+ microphone is a pre-polarized electrets condenser capsule used on sound level meters and noise measurement equipment. The Safety Officers' noise measurement kits include user manuals, quick start guide, calibration. certificates, sound level meter windshield, acoustic calibrator, batteries and power cables. Our sound level meters are suitable for a range of applications and noise measurements including occupational & industrial hygiene, environmental noise monitoring, product testing & development as well as basic noise level measurements. Our acoustic calibrator products include CR:514, CR:515 and CR:511F/. We also offer permanent and portable noise monitors.