The 4-in-1 pH TDS EC Temperature Meter is the professional standard for portable water quality testing, delivering lab-grade accuracy with rugged field-ready construction. Unlike basic testers, this meter features a titanium alloy probe, making it the only choice for demanding environments in Sri Lanka. Whether working in humid hydroponic greenhouses, busy pool maintenance, or industrial water treatment plants, this tool performs without fail.

What sets the 4-in-1 apart is its simultaneous 4-parameter measurement technology with 3-point automatic pH calibration, ensuring you know exactly what you’re measuring. With wide ranges of pH 0-14, TDS 0-19990ppm, EC 0-19990μS/cm, and temperature 0.1-60°C, it is perfectly suited for hydroponics nutrient monitoring, aquarium water quality, drinking water testing, and industrial process control. Compact pen-style design clips easily to your belt yet powerful enough for complex water analysis, the Yieryi 4-in-1 is the daily driver for serious water quality professionals.

Key Features of the Yieryi 4-in-1 Water Quality Meter

4-in-1 Simultaneous Measurement

Measures pH, TDS, EC, and temperature simultaneously, eliminating the need for multiple testing devices.

Titanium Alloy Probe

Corrosion-resistant probe construction ensures long life in pools, hydroponics, and wastewater applications.

3-Point Automatic pH Calibration

One-button calibration at pH 4.00, 6.86, 9.18 provides lab-grade precision for critical testing.

IP67 Waterproof Rating

Fully submersible protection against dust and water, perfect for field use in wet Sri Lankan conditions.

Automatic Temperature Compensation (ATC)

Built-in ATC ensures accurate readings regardless of sample temperature variations.

Backlit LCD Display

Large easy-to-read screen with data hold function works perfectly in dark grow rooms or labs.

Wide Measurement Ranges

Covers pH 0-14, TDS 0-19990ppm, EC 0-19990μS/cm, temp 0.1-60°C for all applications.

Common Applications of 4-in-1 Meter

Hydroponics Nutrient Monitoring

Precisely measure nutrient solutions to optimize plant growth and maximize yields in Sri Lankan farms.

Pool & Spa Water Testing

Maintain perfect pH, TDS, and EC balance for crystal clear water and equipment protection.

Aquarium Water Quality Control

Monitor parameters essential for healthy fish, corals, and aquatic plant environments.

Technical Specifications of the Yieryi 4-in-1 Meter

pH Range

0.00 to 14.00 pH

TDS Range

0-19990 ppm

EC Range

0-19990 μS/cm

Temperature Range

0.1-60.0°C (32.0-140.0°F)

Accuracy

±0.01 pH; ±2% TDS/EC; ±0.5°C

Resolution

0.01 pH; 1 ppm; 1 μS/cm; 0.1°C

Calibration

3-point pH automatic (4.00/6.86/9.18); TDS/EC at 1413 μS/cm

Temperature Compensation

Automatic (ATC)

Waterproof Rating

IP67 (fully submersible)

Power Supply

3 × 1.5V LR44 button cells

Auto Shut-off

5 minutes