General Introduction
Model ST-25D has advantages of low power dissipation, powerful function, friendly and
colorful display screen and abundant content. The instrument can measure A, C, Z
frequency weighting and F, S, I time weighting, and it can also measure multiple
assessment indexes at the same time. Its dynamic range is higher than 122dB.
The instrument enables statistics and integral analysis functions.
The design of low power dissipation and the automatic switchover of battery and the
external power can support the instrument to work for a long time. With embedded 32
MB flash memory turns ST-25D a reliable data logger. It also has a pre-installed 32GB
SD card for WAV recording function.
The instrument can be applied in environment protection, labor health, industrial
enterprise and research and teaching etc. It can also achieve measurement of environ-
mental noise, sound power level, machine equipment noise and building acoustics.
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