They are equipped with continuous monitoring instruments for measuring sulphurdioxide, nitrogen oxides, photochemical oxidants and carbon monoxide.Respirable and total suspended particulates (dust) and lead concentrations are also measured.

• 站内的监察仪器，不断测量本港空气中二氧化硫、氧化氮、光化学氧化剂及一氧化碳含量，同时也测量可吸入悬浮粒子、总悬浮粒子(尘埃)和铅的含量。