Hit Enter to Search
HT157 - CLASS 1 Digital integrating sound level meter

HT157 - CLASS 1 Digital integrating sound level meter


Inquire now
  • HT157 is mobile integrating sound level meters Type (Class 1) which can be used to monitor the equivalent level of nose (Leq), measure Peak values, check soundproofing levels, acoustic pollution, etc.

  • Ii is also indicated for certification according to the Leg. Decrees currently in force as regards environmental noise measurements and in working environments. These devices have a wide measuring range (from 25 to 140dB) and multiple functions such as statistic analysis, 24H analysis, integration of Leq over time, which are indispensable elements when measuring.

Device category (Class) Class 1
Noise measuring range 25 ÷ 140dB
Noise measurement resolution 0.1 ÷ 0.01dB
Frequency range 10kHz ÷ 20kHz
Dynamic range 90dB
Measurement of sound pressure level (SPL)  
Measurement of equivalent noise levels (Leq)  
Frequency weighting A/C/Z A/
Integration over time Fast/Slow/Impulse
Integration with programmable period  
Peak measurements (Peak-, Peak+)  
Display of MAX/MIN values of SPL  
Statistic analysis of noise with "A" weighting  
SPL analysis in 24H  
Spectrum analysis with octave-band filter (1/1) 19Hz ÷ 16kHz
Spectrum analysis with 1/3 octave-band filter  
Provided mobile calibrator Class 1
Manual calibration with trimmer  
Precise calibration with internal procedure  
Pre-polarized “1/2” condenser microphone  
AC and DC analogue outputs with 3.5mm jack Only AC
Internal memory for data saving 128
Recalling of results on the display  
Mini-USB interface for PC connection  
Windows software for saved data analysis  
Display LCD 240 x 160
Display backlight  
Power supply  
Provided external power supply  
Reference standards IEC61672 Class 2 - IEC61620 Class 2
Size (LxWxH) (mm) 285 x 90 x 39
Weight in grams (batteries included) 500

These models also allows carrying out detailed analyses of spectrum components of noise using integrated octave-band filters and 1/3 octave-band filters (only HT157) and they are provided with an internal memory to save data and with a USB interface for transferring data to the PC through dedicated software in a Windows environment with possibility of numerical, graphic and statistic display. Sound level meters ape provided with a practical and resistant case with a mobile calibrator for preliminary checks before each measurement is carried out.

DLgs. 81/08
EMC 2014/30/EU
EMC: IEC/EN61326
IEC60651 Class 1
IEC60804 Class 1
IEC61260 Class 1
IEC61672 Class 1