5-in-1 Combo Meter: pH/TDS/EC/Salinity/Temperature

 pH / EC / TDS / SALINITY / TEMP Meter – Professional 5-in-1 Tester

An advanced 5-in-1 multifunctional meter designed for precise monitoring of water and fertilizer solution parameters. The device combines the functionality of several testers, enabling quick and accurate measurement of key values without the need for separate devices.

Thanks to the use of a modern measuring probe and a digital data processing system, the meter ensures stable and repeatable results, which is crucial in crops requiring strict parameter control.

📊 Measurement functions:

• pH – measurement range: 0.00 – 14.00 pH
• EC (conductivity) – up to approx. 0 – 19999 µS/cm
• TDS – 0 – 9999 ppm
• Salinity – 0.00 – 25.00% (depending on model)
• Temperature – 0°C – 60°C

⚙️ Technical Specifications:

• pH accuracy: ±0.1 pH
• EC/TDS accuracy: ±2% of full scale
• Automatic temperature compensation (ATC)
• Easy-to-read LCD display with simultaneous value readout
• Fast response time (a few seconds)
• Unit selection (°C/°F, ppm/µS)
• Auto-off (battery saving)
• Power supply: batteries (usually 3×1.5V)
• Waterproof housing (depending on the model)

🧪 Design and operation:

The meter is equipped with an integrated electrode probe that measures the pH and conductivity of liquids. The high-quality electrode ensures good sensitivity and wear resistance during regular use.

The device uses automatic temperature compensation (ATC), which means that measurement results are adjusted for the current liquid temperature—this increases accuracy, particularly for EC and pH measurements.

The ergonomic pen-style housing allows for comfortable one-handed use, and the quick reading of results makes the meter ideal for both stationary and mobile work.

🌱 Applications:

• indoor and hydroponic cultivation
• fertilizer solution monitoring
• freshwater and saltwater aquariums
• water filtration systems (RO/DI)
• swimming pools, spas, and hot tubs
• drinking water quality control

💡 Why is it worth it?

Precise control of parameters such as pH, EC, and salinity directly impacts how plants absorb nutrients. This meter allows you to monitor conditions in real time and react quickly, eliminating the risk of fertilization errors.

It is a reliable, versatile tool for both beginners and more advanced users.

📖 User Manual – 5-in-1 pH / EC / TDS / SALINITY / TEMP Meter

🔧 First use:

1. Remove the protective cap from the probe.
2. If the electrode was dry, soak it in clean water for a few minutes.
3. Turn on the device using the ON/OFF button.
4. Select the measurement mode (pH / EC / TDS / SALINITY / TEMP).

🧪 How to take a measurement:

1. Immerse the tip of the meter in the liquid being tested (approx. 2–3 cm).
2. Gently move the device to remove air bubbles.
3. Wait a few seconds for the reading to stabilize.
4. Read the value from the display.
5. When finished, rinse the probe with clean water.

⚙️ pH Calibration (recommended before first use):

1. Prepare a calibration solution (e.g., pH 6.86 or 7.00).
2. Immerse the electrode in the solution.
3. Turn on calibration mode (CAL).
4. Wait until the device stabilizes the reading and confirms the calibration.
5. If necessary, repeat the process for other values (e.g., pH 4.00 / 9.18).

👉 Regular calibration = more accurate measurements.

🧼 Maintenance:

• Always rinse the probe after use
• Do not touch the electrode with your fingers
• Do not store the probe in a dry place

⚠️ Important tips:

• Do not submerge the entire device in water
• Do not use in heavily contaminated solutions without rinsing the probe after measurement

🧼 Storing the electrode (very important)

The pH electrode should not be stored dry —this can lead to a loss of measurement accuracy or damage to the probe.

👉 It is recommended to store the measuring tip in a special electrode solution (KCl).

Regularly maintaining the electrode at the proper humidity significantly extends its service life and ensures stable, accurate measurements.

❓ FAQ – Frequently Asked Questions

➤ Is the meter factory-calibrated?

Yes, but for accurate measurements, calibration before first use is recommended.

➤ Why does the reading "flicker"?

This is normal for the first few seconds. Wait a moment for the reading to stabilize. It may also be due to a dirty probe or lack of calibration.

➤ How often should the meter be calibrated?

With frequent use, it’s best to calibrate every 1–2 weeks. With occasional use, calibrate before an important measurement.

➤ Is the meter suitable for hydroponics?

Yes—it’s perfect for monitoring pH, EC, and TDS in nutrient solutions.

➤ Can I measure tap water or RO water?

Yes, the meter is suitable for both drinking water and filtered water (RO/DI).

➤ What do TDS and EC mean?

• EC refers to electrical conductivity (i.e., the amount of salts/fertilizers in the water)
• TDS is the conversion of this value to ppm (easier to interpret)

➤ Are salinity and EC the same thing?

Not exactly—they are related, but salinity directly indicates the salinity level (e.g., in %), which is particularly important in marine aquariums.

➤ How do you ensure measurement accuracy?

Calibrate the meter regularly and keep the probe clean—that’s the most important thing.