A5 Portable 4-in-1 TDS EC Temperature Water Quality Meter
A5 Portable 4-in-1 TDS EC Temperature Water Quality Meter
A5 Portable 4-in-1 TDS, EC & Temperature Water Quality Meter
Take the guesswork out of water quality with the A5 Portable TDS & EC Meter. This compact, pen-style digital tester gives you instant, accurate readings of Total Dissolved Solids (TDS), Electrical Conductivity (EC), and water temperature — all in one easy-to-use device. Whether you're monitoring drinking water, a hydroponic nutrient solution, an aquarium, a pool, or an RO filtration system, the A5 delivers reliable results in seconds. Made in Mainland China.
Key Features
- 4 Display Modes in One Device – Switch between µS/cm & °F, ppm & °F, µS/cm & °C, or ppm & °C with a single press of the SHIFT button. Always read results in your preferred units.
- Wide Measurement Range – TDS: 0–9999 ppm | EC: 0–9999 µS/cm | Temperature: 0–80 °C (32–176 °F)
- One-Button Operation – Auto-calibrated design means no technical knowledge required. Dip, press, read — results stabilize in seconds.
- HOLD Function – Press the HOLD button to lock the reading on screen. Remove the meter from the water and review the result at your leisure — ideal for side-by-side comparisons of different water sources.
- Backlit Digital Display – Clear, easy-to-read screen even in low-light environments.
- Auto Shut-Off – Powers down automatically after 3 minutes of inactivity, extending battery life.
- Compact & Lightweight Pen-Style Design – Slips easily into a pocket, bag, or tool kit. Always ready when you need it.
- CE & RoHS Certified – Meets international safety and environmental standards.
- Battery Included – Comes with a CR-2032 battery so you're ready to test right out of the box.
What Does Each Parameter Measure?
- TDS (Total Dissolved Solids) – Measures the total concentration of dissolved substances in water (mg/L or ppm). A reading of 0–50 ppm indicates high-purity water ideal for drinking. Use this to assess water cleanliness for drinking, cooking, and everyday household use.
- EC (Electrical Conductivity) – Measures the water's ability to conduct an electric current (µS/cm). Essential for monitoring nutrient strength in hydroponic systems and for maintaining healthy aquarium water chemistry.
- Temperature – Displays water temperature in °C or °F simultaneously, ensuring your TDS and EC readings are contextually accurate.
How to Use
- Remove the electrode protective cap.
- Press the ON/OFF button and immerse the meter tip into the water (do not exceed the immersion line).
- Wait for the reading to stabilize, then press HOLD to lock the value on screen.
- Remove the meter and read the result at your convenience.
- Wipe the electrode clean, power off, and replace the protective cap for storage.
Application Scenarios
- Drinking Water – Test tap water, well water, bottled water, and filtered water to verify purity.
- RO & Water Purification Systems – Monitor filter performance and know exactly when to replace membranes.
- Hydroponics & Plant Cultivation – Maintain optimal nutrient solution strength for thriving plant growth.
- Aquariums & Fish Tanks – Monitor water chemistry to create a safe, balanced environment for aquatic life.
- Swimming Pools & Spas – Check water balance and ensure safe, comfortable swimming conditions.
Technical Specifications
| Model | A5 |
| TDS Range | 0–9999 ppm (mg/L) |
| EC Range | 0–9999 µS/cm |
| Temperature Range | 0–80 °C / 32–176 °F |
| Display | Digital LCD with Backlight |
| Battery | CR-2032 (included) |
| Certification | CE, RoHS |
| Origin | Mainland China |
What's in the Box
- 1 × A5 Portable TDS & EC Meter
- 1 × CR-2032 Battery
- 1 × User Manual
For more information on drinking water quality standards, visit the EPA National Primary Drinking Water Regulations.
Frequently Asked Questions
Q: What is a good TDS reading for drinking water?
A: Generally, a TDS reading of 0–50 ppm is considered excellent and indicates very high-purity water. Readings up to 300 ppm are typically acceptable for drinking water. The A5 TDS meter makes it easy to check your tap, filtered, or bottled water instantly.
Q: Can I use this TDS EC meter for hydroponics?
A: Absolutely. The A5 water quality tester measures both TDS (ppm) and EC (µS/cm), which are the two most important parameters for managing nutrient solution strength in hydroponic and aquaponic systems. Simply dip the meter into your reservoir for an instant reading.
Q: How do I switch between °C and °F or ppm and µS/cm?
A: Press the SHIFT button on the A5 meter to cycle through all four display modes: ppm & °C, ppm & °F, µS/cm & °C, and µS/cm & °F. This flexibility makes the meter suitable for users worldwide and for various testing applications.
Q: How long does the battery last, and is it replaceable?
A: The A5 meter uses a standard CR-2032 coin cell battery (included). The auto shut-off feature — which powers the device off after 3 minutes of inactivity — significantly extends battery life. When the battery runs low, it can easily be replaced with any standard CR-2032 battery available at most stores.
Q: Is the A5 water quality tester waterproof?
A: The A5 is designed for water testing with a defined immersion line on the electrode tip. Do not submerge the meter body above this line. Always replace the protective cap after use and store in a dry location to maintain accuracy and longevity.