Secchi Disk United Scientific™ Plastic Disk with 72‑ft Marked Line

Description

Product Overview

The United Scientific™ SCDSK1 Plastic Secchi Disk is engineered for precise measurement of water transparency in a variety of environments, from freshwater lakes to classroom aquariums. Constructed from high‑impact white polymer, the disk maintains its shape and color even after repeated exposure to sunlight and water. The permanent black sectors are screen‑printed with UV‑resistant ink, guaranteeing long‑term visibility of the measurement zones. The disk measures 8.75 inches in diameter and 2 inches in height, providing a large, easy‑to‑see surface that reduces user error. A 72‑foot (22 meter) polymer line is wound on a lightweight foam bobbin and features a foot‑by‑foot marking system, allowing users to record depth readings with centimeter‑level accuracy. The line is coated with a rot‑proof polymer that resists tangling and abrasion, ensuring smooth deployment and retrieval. All components are packaged in a compact box measuring 8.74 x 7.95 x 2.48 inches and weighing only 1.55 pounds, making storage and transport straightforward for educators, researchers, and field technicians.

Usage

This Secchi disk is suited for a broad range of applications. In educational settings, teachers can demonstrate the principles of light attenuation and water quality by having students lower the disk into a water column and record the depth at which the disk disappears from view. In scientific research, the device serves as a standardized tool for monitoring seasonal changes in turbidity, assessing the impact of runoff, and comparing water clarity across different sites. Field biologists often employ the disk during habitat assessments for fish and macroinvertebrates, where clear water is an indicator of healthy ecosystems. The 72‑foot marked line enables users to measure depths up to 22 meters without the need for additional equipment, making it ideal for both shallow ponds and deeper reservoirs. The lightweight design allows a single operator to handle the disk comfortably, while the robust construction ensures reliable performance even in rugged outdoor conditions.

Why Choose Us

United Scientific™ has a long history of supplying high‑quality laboratory and field equipment, and the SCDSK1 Secchi Disk reflects that commitment to excellence. Each disk undergoes a rigorous quality‑control process that includes impact testing, UV exposure trials, and verification of the printed sector accuracy. The rot‑proof polymer line is engineered to resist kinking, which minimizes measurement errors caused by line deformation. Our customers benefit from a responsive support team that can provide guidance on proper deployment techniques, calibration tips, and troubleshooting advice. In addition, the product is backed by a satisfaction guarantee, reinforcing confidence in its durability and performance. By choosing this Secchi disk, educators and researchers gain a reliable, cost‑effective tool that aligns with industry standards and supports reproducible data collection across multiple study sites.

Key Features

• High‑impact white plastic disk resists cracking and fading for long‑term outdoor use
• Permanent black sectors provide clear visual reference for accurate depth readings
• 72‑foot (22 m) polymer line with foot‑by‑foot markings enables precise measurement without extra equipment
• Rot‑proof line coating prevents tangling and ensures smooth deployment in windy or turbulent water
• Backed by United Scientific’s customer support and satisfaction guarantee for peace of mind

FAQ

How do I determine the correct depth using the Secchi disk?

Lower the disk slowly until it is no longer visible, then read the nearest foot marking on the attached line. Record that depth as the Secchi depth, which represents water transparency at that location.

Can the Secchi disk be used in saltwater environments?

Yes, the disk’s plastic construction and corrosion‑resistant line make it suitable for both freshwater and marine applications, provided the water is not excessively turbulent.

What maintenance is required to keep the disk accurate?

After each use, rinse the disk and line with fresh water to remove debris, then store the components in a dry place. Inspect the printed sectors for wear and replace the line if the markings become illegible.

Is the 72‑foot line sufficient for deep lakes?

The line reaches a maximum depth of 22 meters (approximately 72 feet), which covers most inland lakes and reservoirs. For deeper bodies of water, multiple deployments or a longer line may be necessary.

Do you offer replacement parts for the line or disk?

United Scientific™ provides replacement polymer lines and disk components upon request, ensuring that your measurement kit can be restored quickly without purchasing a completely new unit.