Charcoal filtering tubes and filters help set a true zero
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Remove impurities from the ambient air with these single-use tubes for true zero calibration of your RAE Systems gas monitors. The charcoal or filter in each tube removes potential Volatile Organic Compounds (VOCs) from the air that might throw off readings for highly sensitive monitors, such as the ppbRAE 3000 photoionization detector or the MultiRAE Pro multi-threat monitor.
Multi-use charcoal filters or single-use zeroing tube
Zero calibration in ambient air
Allow true, accurate zero calibration for highly sensitive instruments