Digital TDS EC Meter Water Quality Tester Pen with Backlight LCD Display for Pools & Aquariums

Ensure your water is clean, safe, and properly balanced with this Digital TDS EC Meter Water Quality Tester Pen. Engineered for rapid, multi-parameter liquid testing, this pocket-sized monitor accurately measures Total Dissolved Solids (TDS in ppm), Electrical Conductivity (EC in $\mu\text{S/cm}$), and real-time Temperature (°C/°F). Equipped with Automatic Temperature Compensation (ATC), it automatically adjusts for fluid thermal changes to deliver stable, high-precision readings every time. The dual-color backlit LCD display provides instant visual feedback, illuminating green for optimal purity levels and turning red when high dissolved solids are detected. Perfect for checking drinking water, reverse osmosis (RO) systems, hydroponic reservoirs, freshwater aquariums, and swimming pools.

Key Features

• 3-in-1 Multi-Metric Testing: Simultaneously tests TDS, EC, and Temperature with high-sensitivity titanium alloy probes.

• Dual-Color Backlit LCD Screen: Intuitively indicates water purity with a green backlight for safe levels and red for elevated dissolved solids.

• Automatic Temperature Compensation (ATC): Compensates for temperature variations to ensure consistent measurement accuracy.

• Mode Switch & Data Hold: Easy button controls allow seamless toggling between TDS, EC, °C, and °F, with a hold function to lock readings.

• Ultra-Portable Pocket Pen Design: Compact, lightweight body with a protective probe cap easily slips into pockets or toolkits for on-the-spot testing.

Why Choose Our Digital TDS EC Meter

Relying on chemical test drops or expired test strips is time-consuming, expensive, and leaves room for visual error. Standard water meters often lack backlit screens, making them difficult to read in dim aquarium cabinets or outdoor pool areas. This digital TDS EC pen combines rapid multi-parameter testing, dual-color backlit clarity, automatic temperature compensation, and single-button simplicity—giving your drinking water safety, aquarium maintenance, and hydroponic nutrient management an instant professional upgrade.

Perfect For

• Monitoring filtration efficiency in home reverse osmosis (RO) units, tap water, and well water systems

• Testing nutrient solution concentrations for hydroponics, indoor plant cultivation, and greenhouse crops

• Maintaining proper water chemistry in freshwater aquariums, fish tanks, reef setups, and koi ponds

• Checking swimming pool, hot tub, and spa water quality

• Gifting as a practical home maintenance tool, aquarium hobbyist gift, or hydroponic grower accessory

Specifications

• Testing Metrics: TDS (0–9990 ppm) / EC (0–9990 $\mu\text{S/cm}$) / Temperature (°C/°F)

• Probe Material: Titanium Alloy Probe

• Display: Dual-Color Backlit LCD Screen

• Features: Automatic Temperature Compensation (ATC), Data Hold, Auto-Off Function

• Ideal Uses: Digital TDS EC Water Pen, Aquarium Water Quality Tester, Hydroponic PPM Meter