Sound Level Meter

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TES-660A /TES-660

Micro Noise Dosimeter (Badge Type)

Product Features
  • No Mic. Extension Cable required.
  • Lightweight and small size.
  • Calculates all the popular noise dose parameters.
  • Calculates the LC-LA value.
  • Wide dynamic range from 70 to a full 140dB.
  • Measures simultaneously 3dB and 5dB exchange rates.
Micro Noise Dosimeter    (Badge Type)


Standard applied

ANSI S1.25: 1992 Personal Noise Dosimeter

IEC 61252: 2002 Personal Sound Exposure Meters

Intrinsic safety (660A): EN 60079-0: 2006, EN60079-11: 2007, EN60079-26: 2007


1/2-inch electret field replaceable threaded microphone


128x64 pixel graphics LCD

Measurement Ranges

Dynamic Range: 70dB to 140dB

Peak Range: 103dB to 143dB

Frequency Weightings

A, C and Z, Type 2

Time Weightings

Fast, Slow and Impulse

Exchange Rate

3dB, 4dB, 5dB or 6dB simultaneously

Threshold Level

70 – 90dB in 1dB steps

Criterion Level

70 – 90dB in 1dB steps

Alarm warning indicators

LED showing level noise exceedances during run


Real–time clock with calendar.


Results from 30 measurements can be stored for later viewing and download.

Measurement Control

Measurement Duration : May be set to 5, 10, 15, or 30 minutes or 1, 2, 4, 8, 12, or 24 hours.


Up to 16 timers (automatic start and stop) can be set (maximum up to one month ahead
of measurement time).

Timer Controlled Started / Stop : Set up from the PC software or meter keypad.

Logging storage (results)

At least 100 hours at 4 profiles every minute with unit showing remaining memory recording time in hours when switched on.

Stored profile values

Lavg, LZpk, Leq (Q=3), LCpk

Storage interval

1, 5, 10, 30, 60 minutes can be set


Ten built–in (predefined) default setups are included.

Nine additional user–defined setups can be stored.


Li Polymer (3.7V/470mAh)

Charging unit / PC interface

Complete meter fits neatly into the charging unit (DS-01).

Quick battery recharge in less than 90 mins from completely empty.

Communications via the charging unit (DS-01) and USB to PC.

Operating / Storage Temperature & Humidity

0 to 50ºC (32 to 122ºF),10 to 90%RH / -10 to 60ºC (14 to 140ºF),10 to 75%RH


83.5(L) x 43.4(W) x 49(H) mm with Microphone


Approx. 70g


Instruction manual, Carrying case, Charging unit (DS-01), AC adapter for DS-01 (up to 5 linked DS-01), CD software, USB cable.


The 660A Intrinsically Safe is labeled with the following:


I M1


EEx ia IIC T2 (222°C)

EEx ia I

(Ta = -20°C to +40°C)


Class 1

Division 1

Groups A, B, C and D.

Temperature classification T2