The body HCX/T-AR-SST is in transparent polyamide based (PA-T/AR) technopolymer. Highly resistant to shocks, solvents, oils with additives, aliphatic and aromatic hydrocarbons, petrol, naphtha, phosphoric esters, additives and detergents containing alcohol. High UV resistance. The Packing rings NBR synthetic rubber O-ring and FKM type VITON O-ring. Suggested roughness of the packing ring application surface Ra = 3 µm. The contrast screen is in white lacquered aluminium. The housing, in the appropriate external rear slot, guarantees the best protection from direct contact with fluid. It can be taken out from the inclined side, before assembly to allow the insertion of level lines or words. Incorporated thermometer for temperature reading. The standard executions bulb with colour liquid HCX/T-AR is in zinc-plated steel screws, nuts and washers, NBR packing ring; HCX/T-AR-SST is in AISI 303 stainless steel screws, AISI 304 stainless steel nuts and washers, FKM packing ring; HCX/T-AR-VT is in glass-fibre reinforced polyamide based (PA) SUPER-technopolymer screws, AISI 304 stainless steel nuts and washers, NBR packing ring. Bulb with blue colour liquid HCX/TB-AR zinc-plated steel screws, nuts and washers, NBR packing ring and HCX-AR-SST is in AISI 303 stainless steel screws, AISI 304 stainless steel nuts and washers, FKM packing ring. Thanks to the SUPER-technopolymer screws, HCX/T-AR-VT column level indicator can be used in corrosion resistance applications where stainless steel is not necessary.