R-407A refrigerant Gas Detector 0-2000 ppm 4-20mA - Infrared sensor - SMART3G-C3 Sensitron Dust Proof Enclosure...
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R404A Gas Detector 0-5000 ppm 12-24 Vdc - Infrared sensor - SMART3-H-FM LITE for non classified area S4690R404A...