SMART 3-R 90-240 VAC R1234yf 0-5000 ppm 4-20 mA IRCrowconSMART 3-R 90-240 VAC R1234yf 0-5000 ppm 4-20 mA IRProduct codeS4643R1234YF-220Product codeS4643R1234YF-220Request a quotation