PH and Chlorine Tester Pen

Compact digital pen-style tester for simultaneous pH and free chlorine (Cl2) measurement in swimming pools and spas. Measures pH range 0.0–14.0 with 0.1 resolution and chlorine range 0–10.0 ppm with 0.1 ppm resolution. Device weighs approximately 85 g and measures 160 × 35 mm. Constructed with waterproof ABS plastic housing and IP67-rated body for safe use near water. Requires two AAA batteries (included). Calibrates manually using standard buffer solutions (pH 4.01/7.00) and chlorine calibration solution (not included). Designed for routine monitoring of pool and spa water — no test strips or lab send-offs needed.