HT157 model is a compact, strong and reliable Class 1 sound level meter for detection and recording of each kind of noise level, Leq and Peak values measurements, acoustic pollution, etc. very easy to use. Thanks to a powerful microprocessor it is possible to effect simultaneously multiple functions (Statistical, 24H, Integral analysis). The model permits to perform detailed noise spectral analysis with internal octave and 1/3 octave digital filters and have a internal memory for saving the results of recordings. The transfer of data to PC by using Windows software in order to see the numerical, graphic and statistic visualization screens it’s also a important powerful feature of the meter. The instrument is provided inside a hard carrying case and is supplied with a portable Class 1 calibrator for preliminary checks before starting any measurement

STANDARD

CE mark
IEC60651:1979 Class 1
IEC60804:1985 Class 1
IEC61260:1995 Class 1
IEC61672:2002 Class 1

FUNCTION

• Measuring range 25-140dB
• "Peak", "Fast", "Slow" and “Impulse” integrations
• “A”, “C” and “Z (linear)” frequency weighting
• “Peak+” and “Peak-“ measurement in C weighting
• Statiscal noise analysis weighted “A”
• Statistical noise analysis on the 24 hours
• Spectral analysis with octave and 1/3 octave digital filter
• ½ “ condenser microphone with pre-amplifier
• AC analogical output
• Class 1 portable calibrator
• Internal memory for saving data
• Mini-USB output for connection to PC
• Connection with pen drive USB

ACCESSORIES

Included accessories:

• Class 1 portable calibrator
• External adapter 100-240VAC/5VDC with USB output
• USB cable
• Pen drive USB (TRASCEND JF V30/2GB) + connection cable
• Windscreen
• PC Windows software
• Hard carrying case
• Batteries
• Calibration certificate for SLM and calibrator
• User manual