High Precision Residual Chlorine Test Pen: Your All-in-One Solution for Water Safety Monitoring

At Wanbang Technology, a professional water quality testing instrument manufacturer with 16 years of industry expertise, we are proud to launch our latest product: the CL-M21 High Precision Residual Chlorine Test Pen, designed to set new standards in water safety monitoring.

This portable, user-friendly device combines dual functionality for residual chlorine and temperature measurement, making it an essential tool across diverse water quality applications.

Product Highlights

The CL-M21 test pen is engineered for accuracy and convenience:

- Residual Chlorine Range: 0-4.00 ppm, covering common applications from drinking water to swimming pools

- Temperature Range: 0-60.0°C (32.0-140.0°F), supporting simultaneous water temperature monitoring

- Large LCD Display: Clear, backlit screen shows real-time readings with intuitive icons

- Compact & Portable: Pen-style design fits easily in pockets or toolkits for on-site testing

- Calibration & Hold Functions: Built-in calibration and data hold features ensure reliable, repeatable measurements

Versatile Applications

The CL-M21 is tailored for multiple scenarios, including:

1. Drinking Water Quality Testing: Ensures residual chlorine levels meet safety standards for household and commercial water supplies

2. Swimming Pool & Spa Maintenance: Helps maintain optimal chlorine levels for hygiene and user comfort

3. Aquarium & Fish Tank Monitoring: Protects aquatic life by controlling chlorine concentrations

4. Agricultural & Irrigation Water Management: Supports safe water use for crops and gardening

5. Water Treatment & Sewage Plants: Assists in disinfection process monitoring and compliance checks

Built for Reliability and Ease of Use

As a factory-direct manufacturer, we prioritize quality and user experience in every detail of the CL-M21:

- Cross-Border Grade Quality: Produced with high-precision components for consistent performance in diverse environments

- User-Friendly Operation: Simple one-button control for on/off, calibration, and data hold functions

- Long Battery Life: Energy-efficient design ensures extended use in field operations

- Customization Support: OEM/ODM services available for branding and tailored specifications

Why Choose the CL-M21 Residual Chlorine Test Pen?

Unlike bulky, complex testing equipment, the CL-M21 delivers professional-grade accuracy in a compact, affordable package. Its dual-parameter design eliminates the need for multiple devices, while its robust construction ensures durability in daily use.

Backed by our 16 years of expertise in water purification technology, the CL-M21 is rigorously tested to meet international quality standards. We offer three-warehouse shipping, large stock availability, and video factory inspection for full transparency.

Whether you are a pool maintenance professional, aquarium hobbyist, water treatment technician, or concerned homeowner, the CL-M21 provides a simple, reliable way to monitor residual chlorine levels and ensure water safety.

For bulk orders or customization inquiries, contact Wanbang Technology today to learn more about how the CL-M21 can enhance your water quality monitoring capabilities.