SHEN ZHEN YIERYI Technology Co., Ltd
SHEN ZHEN YIERYI Technology Co., Ltd YIERYI,Your family health guardian!
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The Auto Calibration Multifunctional Testing Pen is an all-in-one water quality tester designed for professionals and everyday users alike. This device offers precise measurements of pH, TDS (Total Dissolved Solids), EC (Electrical Conductivity), and Temperature, ensuring you always have accurate data about your water quality. With its user-friendly design, automatic calibration, and high accuracy, it's perfect for laboratory, agricultural, aquaculture, hydroponics, home, and industrial applications.
4-in-1 Multifunctional Design
Measure pH, TDS, EC, and Temperature with one compact, portable device.
Automatic Calibration
Effortlessly calibrate the meter with a single button press. Ensures reliable and accurate readings every time.
High Accuracy & Precision
Advanced sensor technology provides fast and highly precise measurements.
Large LCD Display
Bright, easy-to-read backlit screen displays all parameters simultaneously.
Simple Operation
Intuitive interface with dedicated buttons for ON/OFF, HOLD, calibration, and temperature unit conversion (°C/°F).
Wide Measurement Range
Suitable for various water quality testing scenarios—drinking water, pools, spas, hydroponics, aquariums, and more.
Automatic Temperature Compensation (ATC)
Ensures accurate readings under different temperature conditions.
Portable & Durable
Lightweight, handheld design with a protective cap, ideal for on-the-go testing.
| Parameter | Range | Accuracy |
|---|---|---|
| pH | 0.00 – 14.00 | ±0.01 pH |
| TDS | 0 – 9999 ppm | ±2% F.S. |
| EC | 0 – 9999 µS/cm | ±2% F.S. |
| Temperature | 0°C – 60°C / 32°F – 140°F | ±0.5°C |
Calibration: Automatic (1-point or 3-point)
Display: Large backlit LCD
Power Supply: 2 × AAA batteries (not included)
Auto-off Function: Yes
1 × Multifunctional Water Quality Testing Pen
1 × User Manual
1 × Protective Storage Case
Drinking water testing
Aquarium and fish tank monitoring
Hydroponics and gardening
Swimming pools and spas
Laboratory and scientific use
Industrial water treatment
Fast, accurate, and reliable measurements
Easy to use—no technical expertise required
Durable build for long-lasting performance
Ideal for home, professional, and industrial use