https://automation.honeywell.com/ca/en/products/sensing-solutions/gas-and-flame-detection/fixed-gas-and-flame-detection/fixed-detector-parts-and-accessories/series-3000-mkll-and-mklll-gas-detectors
Series 3000 Mkll and Mklll Gas Detectors
Loop-Powered Gas Transmitter
seriesgasdetectors