Dwyer Instruments model SM-100 digital sound meter

The model SM-100 digital sound meter is suitable for measuring noise levels from 30 to 130 dB with accuracy of ±1.5 dB.

It has a frequency of 31.5 Hz to 8 kHz, three different dB ranges and a 1 cm condenser microphone. The SM-100 has two frequency weightings: the ‘A’ weighting ranges from 30 to 130 dB, while the ‘C’ weighting ranges from 35 to 130 dB. The 4-digit LCD backlit display has the ability to update in 0.5 s when the unit is set to fast response.

Model SM-100 features data hold, ability to record maximum/minimum, auto ranging, auto power-off and a dynamic range of 50 dB. The compact size of the SM-100 makes it very easy to operate and store. Each unit includes a 9 V battery, carrying case, black foam cover to protect the sensor and instruction manual. The SM-100 is suitable for measuring and recording sound levels in zones or rooms of buildings or near equipment or machinery on the plant floor.