An improved illuminator for generating broadband light, and for delivering the light to a sample with an improved delivery efficiency, for higher optical density andor reduced thermal transfer, than achieved with conventional halogen bulb sources. The powder-coated spinning wire has a shot-blasted plating layer and a powdered coat formed in their order on a core wire. The sleeve has a sleeve axis and the jaw has at least one groove and a container surface that is coaxial with the sleeve axis. Polymeric encapsulation compound covers the chip, the connections, and portions of the lead segments. Finally, the sensing film can be consolidated by thermal annealing or laser annealing under ambient conditions in order to obtain the stable sensing film with higher sensitivity and electrical properties for a SAWBAW based H2S sensor.