Description The Guth Model 34C Simulator is approved by the National Highway Traffic Safety Administration (NHTSA) and published on their Conforming Products List (CPL). Simulator has a completely adjustable solid state temperature controller eliminating broad range mercury-in-glass thermostats. Components within the wet chamber area of the simulator are rust resistant, chrome plated, or stainless steel. The all metal non-magnetic top housing is nickel plated brass with a matte finish, preventing rust and corrosion. This provides for uniform headspace heating and outstanding mechanical security for all fasteners.