Easy to measure turbidity. You can easily measure the water turbidity anywhere with this portable sensor because it cannot be affected by external disturbance light. Unnecessary to draw the water. You just put the probe into the water to measure turbidity. You can avoid the hassle of drawing the water. High durability Controller Unit: Waterproof IP67. Anti-bacterial metrical is used. Sensor Unit: Durable SUS316L is used. Optical window is made of sapphire glass. It is equipped with a rubber to absorb the impact from wear and shock.