ASYS dBELL 108 Noise Monitor

A flexible tool for conducting occupational noise studies and assessing mitigation strategies, the ASYS dBELL 108 IIoT Multi-tool can be deployed as a personal exposure dosemeter, a handheld instrument or a remote monitor compatible with the ASYS dBELL IIoT ecosystem.

At the heart of the dBELL 108 is a calibrated, traceable sound level meter capable of measuring noise parameters required for workplace noise and personal exposure assessments, including LAeq, LCpk and %Dose.

Usage modes:

  • Personal exposure dosemeter: Shoulder mounted for general exposure or task specific assessments, for example drilling, boring, grinding etc.
  • Handheld instrument: Conducting spot checks around the workplace environment.
  • Remote monitor: For longer term studies on time-variable or intermittently noisy processes.

The dBELL 108 automatically connects to the ASYS dBELL 100 IIoT integrated gateway and area monitor via LoRaWAN®, a sub-g wireless technology ideally suited for long range and minimal power consumption.


Displayed Noise Metrics

LAeq    A-weighted, equivalent continuous sound level

LCPeak C-weighted, peak sound level

% Dose


Noise Standards

IEC 61252

ANSI S1.25


Noise Measurements

Linear Operating Range 55-140dB(A)

Peak Range 90-140dB(C)

Freq Weighting A,C

Time Weighting F (125ms), S (1000ms)


Case material ABS

IP Rating IP65

Display 28x15mm

Dimensions 90x150x24mm

Weight 117g

Network connection

Wireless LoRaWAN® 433MHz

Encryption 128-bit AES




Storage -20 to 60C

Operating -10 to 50 C

Humidity 0 to 95% non-condensing