SL-824 is a digital multi-function Sound Level Meter designed to measure sound pressure level and are commonly used in noise pollution studies for the quantification of almost any noise, but especially for industrial and environmental. The device meets the measurement requirements of Safety Engineers, Health, Industrial Safety Offices and Sound Quality control in various environment. It features Bar-graph Indicating & Max Value Holding, built-in condenser mic and digital display. It accurately measures the sound level of just about anything from sound of level of environment to mechanic, vehicle, ship, loudness of computer fans and other noise with ��1.5 dB accuracy. It has the following advantages: 30~130dB range, with A/C weighting, fast/slow response, equipped with Max mode that captures and hold the maximum noise level, provides a windscreen for filter-out unwanted signals and a 9V battery with no extra charge. In almost all countries, the use of A-frequency-weighting is mandated to be used for the protection of workers against noise-induced deafness and the only weighting mandated by the international standard, the frequency weightings "C" being optional fitments.

7 Sound Levels: 30 ~ 130 dB selectable using the Level Selecting Button switch
*************level 1: 30 ~ 80dB
*************level 2: 40 ~ 90dB
*************level 3: 50 ~ 100dB
*************level 4: 60 ~ 110dB
*************level 5: 70 ~ 120dB
*************level 6: 80 ~ 130dB
*************level 7: 30 ~ 130dB
Accuracy: ��1.5 dB
Frequency Range: 31.5 Hz to 8.5k Kz
Linearity Range: 50dB
Measuring Level: 30~130dBA, 35~130dBC
Frequency Weighting: A, C
Digital Display: 4 digits
Resolution: 0.1dB
Display: 0.5 secretary
Bar Graph: 50dB scale at 1dB step for monitoring current sound pressure level display period of 50mS
Level Ranges: 30~80dB, 40~90dB, 50~100dB, 60~110dB, 70~120dB, 80~130dB, 30~130dB
Over indicate over range: Under indicate less than lower limit of the range
AC output: 0.707 Vrms at FS output impedance approx 600 ��
DC output: 10 mV / dB output impedance approx 100 ��
Time weighting: Fast / Slow
Microphone: ? inch electret condenser microphone
Max: Maximum hold
Power Supply: 6F22 9V alkaline cells (30 hrs life span) or DC 9V 100mA
Operating Temperature: 0�FC to 40�FC
Operating Humidity: 10% to 70% RH
Storage Temperature: -10�FC to 50�FC
Storage Humidity: 10% to 80% RH
Dimensions: 235mm(L) x 70mm(W) x 30mm(H)