MF51 4-in-1 Digital Water Quality Tester Pen

MF51 4-in-1 Digital Water Quality Tester Pen - pH 0-14, TDS 0-9999 ppm, EC 0-9999 µS/cm & 0-10 % Salinity

Carry a full laboratory in your pocket. The MF51 combines pH, TDS, EC and salinity sensors in one lightweight pen (183 × 44 × 44 mm), letting you assess drinking water, hydroponic nutrient tanks or aquarium conditions in seconds. A built-in thermometer compensates readings from 0.1 - 60 °C for dependable accuracy wherever you work.

Key Features & Specifications
- 4-in-1 measurement - checks pH 0.00-14.00 (±0.05 pH), TDS 0-9999 ppm (±2 %), EC 0-9999 µS/cm (±2 %) and salinity 0-10 %.
- High-resolution display - shows values down to 0.01 pH or 1 ppm/µS for fine-tuning water quality.
- Automatic temperature sensor - compensates readings from 0.1 - 60 °C for improved precision.
- Field-ready design - compact pen shape slips into a tool pouch; powered by four 1.5 V cells (150 mAh total) for extended on-site use.
- User-friendly operation - single-button cycling through test modes streamlines multi-parameter checks.

Ideal Usage Scenarios
- Daily calibration of hydroponic reservoirs to keep nutrient strength and pH in the sweet spot.
- Rapid aquarium checks before water changes to maintain stable conditions for fish and corals.
- Testing tap or well water while travelling or camping.
- Monitoring swimming pool salinity and pH to balance sanitiser efficiency.
- Quality control in beverage production—verify dissolved solids and acidity in brewing or bottling.

Why This Product Is the Perfect Buy
Instead of juggling four separate meters, the MF51 consolidates every key parameter into one tool, saving space, batteries and calibration solution. Its ±2 % / ±0.05 pH accuracy rivals dedicated instruments, yet the pen-style housing costs a fraction of a bench-top unit—ideal for professionals and hobbyists alike.

Interesting Facts About Multi-Function Water Testers
- Conductivity (µS/cm) and TDS (ppm) are mathematically linked; meters that measure both help users understand mineral content and electrical properties simultaneously.
- Automatic Temperature Compensation adjusts readings to 25 °C, the standard reference point in water chemistry.
- A 0-14 pH range covers everything from strong acids to strong bases—beyond what most household liquids ever reach, ensuring versatility for future projects.

Measure smarter and travel lighter with the MF51 Water Quality Tester Pen.

Packing: Bulk