... Level Switch 2. Approved ISO9001: 2008 3. Applied for solid, powder,granule etc. 4. OEM, ODM. 1. Rotary Paddle Level ... Switch2. Approved ISO9001: 20083. Applied for powder, plastic, particle shape material, cement, sand, particles, filler, pigment ... and standby time. Rotary Paddle Level Switch is also suitable for plastic, food, chemical industry, mineral iron, material and ...