What this order code builds
The 266HSHMSTT1E1L1B6S2I2 is a fully configured 266HSH gauge pressure transmitter from the manufacturer's current-production line. The order code decodes to a 316L SS barrel housing with M20 x 1.5 electrical connection, a 316L SS diaphragm filled with silicone oil, and a 1/2-14 NPT male process connection. The span limits cover 0.06 to 6 bar (0.87 to 87 psi), making it suitable for medium-pressure process monitoring on pumps, compressors, and filtration skids. Output is 4-20 mA with HART digital communication, and the integral LCD (L1 option) gives a local pressure readout without needing a handheld communicator. The S2 option adds a surge/transient protector on the loop — worth having if the transmitter sits on a long cable run or near motor starters where inductive kickback is a risk.
Hazardous-area fit and wetted materials
ATEX Intrinsic Safety certification (option) covers Gas Group IIC T6 and Dust Group II 1/2 D T95 °C. That means the transmitter can be installed in Zone 0 gas and Zone 20 dust atmospheres without a separate barrier if the loop is fed through a certified isolator. The 316L SS wetted parts — body, diaphragm, and drain/vent valve on process axis — handle most corrosive process fluids except strong chlorides above 60 °C. The carbon steel pipe/wall mounting bracket (B6) is explicitly marked as not suitable for AISI 316L housings — if the environment demands full stainless corrosion resistance, order the stainless bracket variant instead. The barrel housing itself is 316L SS, so the bracket is the weak link in a washdown zone.