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RKI Humidity Filter Disk is needed when ordering the for Phosohine (PH3) sensor individually. The PH3 sensor utilizes a humidity filter to prevent unstable readings around 0 ppm. Sold 5 filters per pack. Part Number: 33-7133 GX-3R Pro Manual: Related Searches Gas Detection, Gas Detector Accessories
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🇺🇸 Ship from USA · On Agora since 2025
$39.64