The LD-5D model is a relative concentration meter that uses the light scattering method. By incorporating a sheath air mechanism in the detection unit and a built-in suction pump, it can measure high-concentration dust environments such as those found in hybrid road construction.
The relative concentration needs to be converted into a mass concentration conversion coefficient (K value) based on the filtration collection method and corrected to mass concentration. However, the LD-5D can simply convert the measured value into mass concentration and display it by pre-entering the mass concentration conversion coefficient. Additionally, since it has the same characteristics as existing dust meters (laser light source type), the same mass concentration conversion coefficients used so far can be applied at the same work site.
※ (Public Corporation) Japan Working Environment Measurement Association Calibration Standard Applicable Products

● Equipped with a protective air mechanism, it eliminates concerns about contamination of the optical system, enabling stable measurements in workplaces with high concentrations of dust.
●Due to the use of a large filter, it can be used for long periods even in high-concentration measurements.
●The dirt condition on the filter can be seen at a glance.
● By entering the K value in advance, the measured value (CPM) can be converted to mass concentration (mg/m3 ) Can be converted and displayed.
●The factory-set sensitivity is automatically maintained through the "SPAN CHECK" and "BG measurement" performed before measurement.
● The measured value (CPM) can be recorded on the subject. (Record the measurement mode situation)
●The recorded measurement values can be imported into a PC in text format and saved using the included USB cable and communication software.
● During measurement, the output corresponds to the voltage or pulse of the concentration.
●The power supply can use dry batteries or an AC adapter.
●Can be installed on commercially available tripods.