SOUND LEVEL METER The SKF TMSP 1 is a high quality, hand-held instrument for measuring the sound level in decibels. The environmental noise is picked up by the electret condenser microphone and then processed by the handset. The surrounding noise can be monitored both quantitatively and qualitatively. The SKF Sound pressure meter is supplied in a carrying case complete with windshield, calibration screwdriver, jack for external outputs and an alkaline battery. Technical data Designation    TMSP 1 Description    SKF Sound Pressure Meter Frequency range    31,5 Hz to 8 KHz Measuring level range    30 to 130 dB Display    LCD Digital display    4 digits Resolution: 0,1 dB Display update: 0,5 s Analogue display    50 segments bar-graph Resolution: 1 dB Display update: 100 ms Time weighting    Fast (125 ms), Slow (1 s) Level ranges    Lo = 30 ~ 80 dB Med = 50 ~ 100 dB Hi = 80 ~ 130 dB Auto = 30~130 dB Accuracy    ±1,5 dB (ref 94 dB @1 KHz) Dynamic range    50 dB Power supply    9V Alkaline, IEC 6LR61 Power life    50 hours (with alkaline battery) Operation temperature    0 to 40 ºC (32 to 104 º F) Operation humidity    10 to 90 % RH Operation altitude    Up to 2 000 m (6 560 ft) above sea level Storage temperature    -10 to 60 ºC (14 to 140 ºF) Storage humidity    10 to 75 % RH Dimensions    275 x 64 x 30 mm (10.8 x 2.5 x 1.2 in.) Case dimensions    310 x 165 x 73 mm (12.2 x 6.5 x 2.8 in.) Weight    285 g ( 0.76 lb) including battery Total weight (incl.case)    730 g ( 1.95 lb)