5-in-1 Free Chlorine Meter CL2 Tester Pen – Precision Pool Monitoring

Advanced Multi-Function Testing
– Measures free chlorine (CL2), residual chlorine, temperature, and more with a single compact device for comprehensive water quality analysis.
High-Accuracy Sensor Technology
– Features a premium electrochemical sensor for reliable, lab-grade readings (±0.05 mg/L CL2 resolution) with automatic temperature compensation.
Rugged & Portable Design
– Durable ABS housing with IP67 waterproof rating, shock-resistant casing, and ergonomic pen-style grip for on-the-go testing.
Fast One-Touch Operation
– Instantly displays results on a backlit LCD screen; no reagents or calibration needed—ideal for pools, spas, and industrial water treatment.
Long-Lasting Performance
– Includes replaceable AAA batteries and a low-power sleep mode for extended field use.
Trusted by Professionals
– Certified for NSF/ISO standards, trusted by pool maintenance teams, hospitality sectors, and water safety inspectors.
Bulk Order Advantage
– Direct factory pricing, wholesale discounts, and global logistics support for large-scale procurement.