Reed¬€ Instruments¬€ R8090¬€ (SC¬‰ 05)¬€ Sound¬€ Level Calibrator¬€ for¬€ 1/2"¬€ Diameter¬€ Microphones, +/¬‰ 0.5dB¬€ Accuracy¬€ 

This sound calibrator generates a stable acoustic signal at a controlled frequency and amplitude to verify the accuracy of your sound level meter. The R8090 is compatible with all 1/2" diameter microphones. Features Generates stable acoustic signal at a controlled frequency and amplitude to verify sound level meter accuracy Accommodates sound meters with 1/2" diameter microphones Simply place calibrator on microphone, turn on and adjust your sound level meter Complies with IEC 942 Class 2 REED R8090 Specifications Output Sound Pressure 2 levels (94dB and 114dB) Accuracy ±0.5dB Output Frequency 1000Hz ±4% Power Supply 9V Battery Product Certifications CE Operating Temperature 32 to 104°F (0 to 40°C) Storage Temperature -4 to 140°F (-20 to 60°C) Operating Humidity Range 0 to 80% Dimensions 4.7 x 2 x 1.7" (120 x 51 x 43 mm) Weight 4.6oz (130g)