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Vivosun 3-in-1 Water & Soil Testing Combo

Official VIVOSUN Dealer Model: WEB-COMBO-PH
  • Digital pH meter with plus or minus 0.1 accuracy and one-touch calibration.
  • TDS and EC measurements up to 9999 with plus or minus 5 percent accuracy.
  • Dual 7.8 inch probes for testing deep into the root zone.
  • 2-year warranty
  • View More Details

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are checking your runoff because you keep hitting nutrient lockout and want to stop it before leaves yellow.
  • You are testing your source water before mixing because small fluctuations in your ppm lead to inconsistent feeding.

  • The battery-free soil tester is a lifesaver when you need a quick check and do not want to hunt for fresh AAAs.
  • We recommend keeping a small jar of distilled water handy to rinse the pH probe between every single reading.

  • Gardeners who switched to this combo say they caught pH drift early enough to adjust feedings without losing biomass.
  • Users report that the backlit screens make reading their reservoir levels much easier in dark grow rooms.

Vivosun 3-in-1 Water & Soil Testing Combo

Nutrient lockout, pH drift, and over-watering are hard to catch by eye. By the time leaves yellow or curl, the problem has usually been building for days. The Vivosun Water & Soil Testing Combo gives you three dedicated meters in one kit so you can check both your water and your root zone before symptoms appear. The kit includes a digital pH meter with ±0.1 accuracy, a 4-mode TDS/EC/temperature tester, and a battery-free analog soil tester.

The Vivosun pH tester reads 0.00–14.00 pH and calibrates with one touch using the included buffer powder packs. The 3-in-1 TDS tester measures total dissolved solids (0–9999 ppm) and electrical conductivity (0–9999 µS/cm) with ±5% accuracy. It shows water temperature on the same screen, and you can cycle through four display modes to read ppm or µS/cm alongside °C or °F. Both digital testers use large backlit LCD screens that stay readable in dim grow rooms. The TDS tester's HOLD button locks a reading on screen so you can record it.

For soil growers, the 3-in-1 soil tester slides between moisture, pH, and light modes. Its color-coded dial shows at a glance whether your medium is dry, moist, or wet, and whether it's acidic or alkaline. The dual 7.8″ probes reach into the root zone, and the tester needs no battery. The Vivosun combo covers hydroponic reservoirs, soil beds, RO systems, aquariums, pools, spas, and household water checks.

Features

🎯
±0.1 pH Accuracy

Reads the full 0.00–14.00 pH range with one-touch automatic calibration using included buffer packs.

💧
4-Mode TDS/EC Tester

Measures TDS and EC to 9999 at ±5% accuracy, paired with °C or °F readings.

🌱
Battery-Free Soil Tester

Slide between moisture, pH, and light modes; color-coded dial and 7.8″ probes need no batteries.

🔆
Backlit LCD Screens

Large backlit displays on the digital pH and TDS testers stay readable in dim grow rooms.

📌
Hold & Memory Functions

Lock readings for easy logging, and keep settings after unexpected power interruptions.

🔄
Multi-Use Applications

Test hydroponic reservoirs, soil, RO systems, aquariums, pools, spas, and household water.

Specifications

Specification Value
pH Tester – Measuring Range 0.00–14.00 pH
pH Tester – Accuracy ±0.1 pH
pH Tester – Calibration One-touch automatic (buffer powder packs included)
pH Tester – Display Backlit LCD
TDS Tester – TDS Range 0–9999 ppm (1 ppm resolution, ±5% accuracy)
TDS Tester – EC Range 0–9999 µS/cm (1 µS/cm resolution, ±5% accuracy)
TDS Tester – Temperature Range 0.1–80°C / 32–176°F (0.1 resolution, ±1 accuracy)
TDS Tester – Display Modes ppm & °C, ppm & °F, µS/cm & °C, µS/cm & °F
TDS Tester – Operating Temperature 0.1–80°C / 32–176°F
TDS Tester – Controls ON/OFF, MODE, HOLD/CAL
TDS Tester – Display Backlit LCD
TDS Tester – Power Supply 1× 3V CR2032 button cell
Soil Tester – Modes Moisture, pH, Light (3-position slide switch)
Soil Tester – Moisture Scale 1–10 relative (1–3 Dry, 4–7 Moist, 8–10 Wet)
Soil Tester – pH Scale 3.5–8 pH (3.5–7 Acidic, 7–8 Alkaline)
Soil Tester – Light Scale 0–2000 lux (relative intensity)
Soil Tester – Display Analog dial, color-coded
Soil Tester – Power No battery required
Soil Tester – Dimensions 10.8″ × 1.8″ (7.8″ probe length)

Warranty

Vivosun backs the Water & Soil Testing Combo with 2 years of after-sale service.

Frequently Asked Questions

What does the Vivosun Water & Soil Testing Combo include? +

The combo includes three testers: a digital pH meter, a 3-in-1 TDS/EC/temperature tester, and an analog 3-in-1 soil tester for moisture, pH, and light. Buffer powder packs are also included for calibrating the pH meter.

How do I calibrate the Vivosun pH tester? +

Mix the included buffer powder packs into solution, then use the one-touch automatic calibration function. The meter calibrates itself to the buffer, so no manual adjustment is needed.

What's the difference between TDS and EC readings? +

EC (electrical conductivity) measures how well your solution conducts electricity, reported in µS/cm. TDS (total dissolved solids) converts that value to an estimated concentration in ppm. Press MODE on the Vivosun TDS tester to switch between ppm and µS/cm, with temperature shown in °C or °F.

Does the soil tester need batteries? +

No. The 3-in-1 soil tester is an analog meter that needs no battery. Push the probes into the soil, set the slide switch to moisture, pH, or light, and read the color-coded dial.

How do I read the soil tester's moisture and pH scales? +

In moisture mode, 1–3 (red) means dry, 4–7 (green) means moist, and 8–10 (blue) means wet, so you know when it's time to water. In pH mode, the dial reads 3.5–7 as acidic and 7–8 as alkaline.

What battery does the TDS tester use? +

The Vivosun 3-in-1 TDS tester runs on a single 3V CR2032 button cell. These are widely available and easy to replace.

Can I use this kit for hydroponics? +

Yes. The pH meter and TDS/EC tester are well suited to monitoring hydroponic reservoirs, with ranges up to 14.00 pH and 9999 ppm TDS. Regular checks help you catch pH drift and nutrient imbalances early.

What else can I test besides grow water and soil? +

The water testers work for drinking water, RO systems, aquariums, swimming pools, and spas. They measure pH, TDS, EC, and temperature, giving you a quick read on water quality wherever you use them.

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Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

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