Sabary Secchi Disk Water Clarity Measurement Kit, 7.87 In/20 cm Black White Secchi Disc with Stainless Steel Cone Weight and 17.4 ft Line for Lake, Pond, River, Reservoir & Aquarium

Features: Simple Operation, No Electronics Needed: Lower the Secchi disk into the water until the black and white pattern is no longer visible, record the depth, then raise it slightly to confirm the reading. No batteries, calibration or electronic meters are required. Wide Use for Education and Field Monitoring Ideal for lakes, ponds, rivers, reservoirs, aquariums, fish ponds, environmental surveys, science classes and outdoor water observation, this portable kit is useful for both home users and basic field testing. Specifications: Material: acrylic, Nylon, Stainless Steel Color: black, white Size: Secchi Disk: approx. 7.87 inches/ 20 cm Holding Line: approx. 17.4 feet/ 5.30 M Package includes: 1 Set of secchi disk Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays

• Complete Secchi Disk Set: this set includes an approximately 7.87 inch/20 cm secchi disk, an approximately 17.4 ft/ 5.30m nylon holding line, and a stainless steel conical weight; The water clarity test disk comes with all needed components for immediate water transparency measurement
• Classic Black and White Quadrant Design: The high-contrast black and white quadrants make it easier to observe when the Secchi disk disappears underwater, helping users measure Secchi depth and compare water transparency changes over time.
• Helps Measure Water Clarity: Designed for visual water transparency testing, this Secchi disk helps indicate clarity changes caused by suspended particles, algae, sediment or general turbidity in ponds, lakes, rivers, reservoirs and aquariums.
• Stainless Steel Cone Weight for Stable Sinking: The included stainless steel cone weight helps the disk sink smoothly and stay more stable in the water, reducing floating or tilting during outdoor water clarity measurements.
• 17.4 ft Line for Practical Depth Checks: The 17.4 ft/5.3 m holding line is suitable for shallow to medium-depth water checks, making it useful for backyard ponds, aquaculture ponds, classroom experiments, shoreline testing and field observations.