APEM SN Series T-Bar Faders. The SN series of precision T-bar faders from APEM feature the latest generation Hall effect sensors and industry standard mounting. With precision ball race bearings and PTFE guides, these faders offer absolute positioning. SN T-bar faders are provided with both a barrel and a bullet aluminium handle. SN T-bar faders are constructed from mineral filled nylon with an acetyl lever and aluminium handle. With a 0.5 N operating force, these T-bar faders have a friction clutch centring lever action. Noise free operation Magnetic shielding Operating temperature of -20°C to +70°C Expected lifetime of 1 million cycles 65 g weight 63° angle mechanical movement (±31.5° from the centre). Product Application Information. Suitable applications for these T-bar faders include sound and broadcasting panels and video and image-editing equipment. SN series faders are also recommended for lighting panel equipment, music studio equipment.