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- Built-in pump suction measurement, can be switched to diffusion, diffusion + pump suction detection mode
- Pump blocking alarm
- LED lighting (optional)
- Unit free switch, unit optional: umol / mol, ppm, pphm, ppb, mg/m3, ug / m3, %Vol, %LEL
- 8 Key-button operation, quick and one-key calibration function
- Data storage, the storage capacity is not less than 100,000 pieces
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