R1234yf Gas Detector - Explosion Proof Enclosure Version S3657R1234YF
R-1234yf refrigerant Gas Detector, HFO-1234yf Gas Detector 0-2000 ppm 4-20mA - Infrared sensor - SMART3G-C2 Sensitron Explosion Proof Enclosure version Zone 1 category 2 areas S3657R1234YF