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sound level meter, digital sound level meter, sound meter, noise meter, multifunctional sound level meter, dicibel meter, Specification Model SL-5868P SL-5858 SL-5866 SL-5826 Standard GB/T 3785,IEC 651 Type 2,ANSIS 1.4 Type 2 Function Lp (sound level) √ Leq (simple equivalent sound level) √ -- Ln (statistic sound level) √ -- Measurement range LP A 30 130dB L:35 130Db H:80 130dB C 35 130dB -- 40 130dB 35 130dB -- Leq -- Ln 0-100% -- Filter -- √ -- Detection characteristics Fast / slow DC output 10mv=1db (AC optional) 10mv=1db -- Resolution 0.1 dB Accarcy 1dB Memory 30groups -- Display LCD Alarm set 30 130dB -- Alarm output Relay contact -- Power supply 4x1.5V AA A battery 1x9V 6F22 battery 4x1.5V AA (UM-3) battery Indicator Low battery indicator PC interface √ -- Auto switch off Dimension 236x63x26mm 195x72x31mm 233x68x32mm weight (not including battery) 170g 195g 158g 175g Standard delivery Main Unit 1 Windscreen 1 Carrying Case B04 B01 Operation Manual 1 Optional Accessories ND9 sound level meter calibrator (AC adapter) (only for 5868P) Cable and software for RS-232 Specification Model SL-5856 SL-5818 Standard IEC 651 Type 2,ANSIS 1.4 Type 2 Function Lp (sound level) √ √ Leq (simple equivalent sound level) -- √ Ln (statistic sound level) -- √ Measurement range A 30 130dB 30 130dB C -- 35 130dB -- 35 130dB -- √ Detection characteristics Fast / slow Resolution 0.1 dB Accarcy 1dB Display LCD Power supply 4x1.5V AA (UM-3) battery Indicator Low battery indicator Dimension 210x69x32mm weight (not including battery) 175g Standard delivery Main Unit 1 Carrying Case B01 Operation Manual 1 Optional Accessories Nd9 sound level meter calibrator SOUND LEVEL METER CALIBRATOR MODEL: ND9 STANDARD: ANSI S1.40 CLASS2, IEC942 OUTPUT SOUND LEVEL:94dB & 114dB FREQUENCY:1000Hz+2.4% DESIGN FOR:1",1/2" POWER SUPPLY:9V 6F22 BATTERY DIMENSION:145X47X47mm