5-in-1 Water Quality Meter: TDS EC pH Salinity Temp Tester Pen

ALLOYSEED 5-in-1 Digital Water Quality Tester Pen

Get instant, accurate readings across five essential water quality metrics with the ALLOYSEED 5-in-1 Water Quality Meter. Whether you're monitoring your aquarium, swimming pool, spa, garden, or home water supply, this compact pen-style tester delivers fast, reliable results right at your fingertips.

Why Choose This Water Quality Tester?

• 5 Measurements in 1 Device: Simultaneously measures TDS (Total Dissolved Solids), EC (Electrical Conductivity), pH, Salinity, and Temperature — eliminating the need for multiple tools.
• IP67 Waterproof: Fully waterproof to IP67 standards, so you can dip it directly into water without worry.
• Clear Green-Backlit Display: The large 33×24mm digital screen with green backlight ensures easy reading in any lighting condition.
• Pen-Shaped Portable Design: Lightweight at just 150g, with a compact form factor (183×37×37mm) that fits in your pocket, lab coat, or tackle bag.
• Fast & Stable Readings: Advanced sensors deliver stable measurements within seconds for efficient, professional-grade monitoring.
• Premium ABS Construction: Durable, high-quality ABS body built to withstand regular use in homes, labs, pools, and outdoors.
• Battery Included: Powered by 3× LR44/AG13 1.5V button batteries — included right out of the box, so you're ready to test immediately.

Measurement Ranges & Accuracy

• TDS: 0–1000 ppm
• EC: 0–10,000 µS/cm
• pH: 0.01–14.00 pH
• Salinity: 0.00–25.00% (±0.1% for 0.01–5.00%; ±1% for 5.01–25.00%)
• Sea Water Salinity: 10.1–200.0 ppt

Perfect For

• 🐠 Aquariums & fish tanks
• 🏊 Swimming pools & hot tubs / spas
• 🌱 Home gardens & hydroponic farms
• 🔬 Laboratories & scientific research
• 🏡 Home drinking water monitoring
• 🌊 Marine & saltwater environments

Specifications

What's in the Box

• 1× ALLOYSEED 5-in-1 Water Quality Tester
• 1× User Manual

Note: Due to differences in monitor settings and lighting, the actual color may vary slightly from images. Please allow ±1–2cm measuring deviation due to manual measurement.

For more information on water quality standards and safe water testing practices, visit the U.S. Environmental Protection Agency – Ground Water and Drinking Water resource page.

Frequently Asked Questions

Q: What does the 5-in-1 water quality tester measure?

A: This ALLOYSEED water quality meter measures five key parameters in one device: TDS (Total Dissolved Solids, 0–1000 ppm), EC (Electrical Conductivity, 0–10,000 µS/cm), pH (0.01–14.00), Salinity (0.00–25.00%), and Water Temperature — making it a comprehensive tool for aquariums, pools, spas, gardens, and home water testing.

Q: Is this water quality tester pen waterproof?

A: Yes! The tester features an IP67 waterproof rating, meaning it can be fully submerged in water up to 1 meter for up to 30 minutes, making it safe to dip directly into pools, aquariums, or any water source for accurate readings.

Q: Does the water quality meter come with batteries?

A: Yes, the device is powered by 3× LR44/AG13 1.5V button batteries, which are included in the package. You can start testing water quality immediately after unboxing.

Q: Can I use this meter to test saltwater or marine aquarium water?

A: Absolutely. The meter includes a dedicated sea water salinity measurement range of 10.1–200.0 ppt, making it an excellent choice for marine aquarium hobbyists and saltwater pool monitoring.

Q: How do I read the results on this water quality tester?

A: The tester features a large 33×24mm digital display with a green backlight, making results easy to read in bright sunlight or low-light environments. Simply submerge the probe end in water and the readings stabilize within seconds.