2108N4010H Optima Plus Gas Detector, hydrocarbon version, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote gassing cell, polyester mesh dust barrier, nylon weather protection housing and LNP Faradex deluge/sunshade 2108N4011N Optima Plus Gas Detector, ethylene version, 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote gassing cell, polyester mesh dust barrier, nylon weather protection housing and LNP Faradex deluge/sunshade 2108N4011H Optima Plus Gas Detector, ethylene version, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote gassing cell, polyester mesh dust barrier, nylon weather protection housing and LNP Faradex deluge/sunshade 2108N5000N Optima Plus Gas Detector, hydrocarbon version for sampling systems, 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing 2108N5000H Optima Plus Gas Detector, hydrocarbon version for sampling systems, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing 2108N5001N Optima Plus Gas Detector, ethylene version for sampling systems, 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing 2108N5001H Optima Plus Gas Detector, ethylene version for sampling systems, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing 2108N5010N Optima Plus Gas Detector, hydrocarbon version, 4 to 20mA output, ATEX/ IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote gassing cell, polyester mesh dust barrier, nylon weather housing and LNP Faradex deluge/solar sunshade. Only use with gas calibrations 0 to **v/v Methane (2108D3050), 0 to 400,000ppm propane (2108D3100) or 0 to 600,000 ppm propane (2108D3102) 2108N5010H Optima Plus Gas Detector, hydrocarbon version, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote gassing cell, polyester mesh dust barrier, nylon weather housing and LNP Faradex deluge/solar sunshade. Only use with gas calibrations 0 to **v/v Methane (2108D3050), 0 to 400,000ppm propane (2108D3100) or 0 to 600,000 ppm propane (2108D3102) 2108B2021N Optima Plus Gas Detector, X version optimised for sampling systems, 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote extended gassing cell, polyester mesh dust barrier and nylon weather protection housing. Programmed with specific ** LEL Propane calibration curve 2108B2021H Optima Plus Gas Detector, X version optimised for sampling systems, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes pre-fitted remote extended gassing cell, polyester mesh dust barrier and nylon weather protection housing. Programmed with specific ** LEL Propane calibration curve 2108N5002N Optima Plus Gas Detector, Z version optimised for solvent detection, 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing. Programmed with specific calibration curve 2108N5002H Optima Plus Gas Detector, Z version optimised for solvent detection, HART? over 4 to 20mA output, ATEX/IECEx, M25 thread spigot, electro polished 316SS, includes black anodised aluminium flow housing. Programmed with specific calibration curve