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Description:Product id: Dsl 336 Sound level calibrator Sound level calibrator Model dsl 336 Features: 1.94db and 114db sound calibration at 1khz 2. Acurate and simple to use 3. Fits 1 inch,1/2 inch or 1/4 inch diameter microphone Dsl 336 specifications: Specifications for dsl 336 ce approved Output sound pressure levels 114db and 94db re 20 upa under reference conditions. Output frequency 1000hz 4% Reference conditions temperature -->23 deg c(73 deg f) Atmospheric pressure -->1013 mbar(760mm of hg) Relative humidity -->65% Accuracy of sound pressure level under stated reference environment conditions 0.5db Power one 9v battery 006p or iec 6f22 or neda 1604. Battery test internal circuitry checks condition of battery continuously. Calibrator will operate at all if battery voltage falls below Acceptable range. Battery life about 50 hours Dimensions 103(l) x 63(w) x 54(h)mm Weight approx.200g(include batteries) Operating temperature 0 - 50 deg c(32 - 122 deg f) Operating humidity 0 - 90%rh Accessories 9v battery, carrying case, instruction manual.1,1/2 and 1/4 Microphone adaptor Certificate: Ce