Temtop PMD 331 Innovative Handheld Particle Counter for Air Quality Measurement

Temtop PMD 331 is an innovative device can measure the 7 mass range simultaneously 0.3μm/ 0.5μm/ 0.7μm/ 1μm/ 2.5μm 5μm/ 10μm. With a TFT LCD large screen and seven front panel buttons making the device very easy to read and operate. The PMD 331 can record up to 2,000.000 readings and operate 8 hours in full charge. The unit has its own calibration mode and export function via USB or RS232. It also has a wide range of applications such as cleaning rooms. filter testing, IQA investigation, air quality monitoring, etc... This particle counter is composed of a Laser emitter, Silicon Photocell, Opto-mechanical Structure, Optic, Cutter, Air Pump, Filter Device, and Electronic Circuit.  Technical Specifications Dimensions:  6.69*4.33*1.97 Inches Working Principle:  Laser Mie-scattering Principle Working Temperature Range: 0~50℃ Storage Temperature Range:  -20℃~60℃ Measuring Range:   0~3,000,000 particles/ft³ Accuracy: ±10% Traffic:  2.83L/min Laser Emitter: 50mW, 780nm Sam