Other Storage Fluids — Measuring Instruments > pH & EC Control > Calibration Fluids for pH and EC Meters

Essentials CF Standard 2.8ms 30ml is a buffered solution / calibration fluid for instruments that measure electrical conductivity (EC).

• accuracy: ±0.01 EC
• value: 2.8 µS/cm at 25°C
• volume: 30 ml
• single-use

🔹 pH 7.01 Calibration Solution - 300 ml is specially formulated for calibrating pH meters, ensuring accurate and precise measurements. With its stable pH level of 4.01 at 25°C, it is ideal for checking and adjusting measuring instruments used in hydroponics, aquariums, laboratories, and other applications.

🔹 Detailed specifications:

• Volume: 300 ml
• pH value: 7.01 at 25°C
• Application: Calibration of pH meters
• Composition: Complies with international standards for calibration solutions
• Manufacturer: Wather Masters

🔹 Recommendations and instructions for use:

1. Pour a small amount of the solution into a clean container.
2. Immerse the pH meter electrode in the solution.
3. Calibrate according to the manufacturer's instructions for your pH meter.
4. After use, discard the used solution and do not return it to the original packaging to avoid contamination.

✅ Benefits of use:

• Accuracy: Ensures precise pH measurements.
• Easy to use: Convenient for use both in laboratory and field conditions.
• Compatibility: Suitable for most pH meters on the market.
• Durability: Stable pH value, ensuring reliable calibration of your instruments.

Growth Technology pH Probe Refill & Storage Solution is a specialised solution for maintaining, refilling and storing pH electrodes with liquid electrolyte. Regular use of the solution helps maintain accurate measurements, extends electrode life and prevents the sensitive measuring membrane from drying out.

Every pH electrode needs proper maintenance to provide accurate and reliable measurements. Growth Technology pH Probe Refill & Storage Solution is specially developed for pH probes and electrodes with liquid electrolyte, allowing both replenishment of the internal solution and proper storage between measurements.

During normal use, the electrolyte level in pH electrodes gradually decreases. Regular topping up with a suitable solution helps maintain correct electrode operation and ensures consistent measurement accuracy.

In addition to being a refill solution, the product also serves as a pH probe storage solution. When the electrode is not in use, its glass tip should remain immersed in a suitable liquid. This prevents the membrane from drying out and significantly extends the measuring instrument's service life.

The formula contains diluted potassium chloride (KCl), which maintains the electrode in optimal condition and helps preserve its sensitivity and accuracy even during prolonged use.

Technical specifications

✔️ Manufacturer: Growth Technology

✔️ Product type: pH probe refill and storage solution

✔️ Pack size: 300 ml

✔️ Main ingredient: Diluted potassium chloride (KCl)

✔️ Suitable for pH electrodes with liquid electrolyte

✔️ Maintains the correct electrolyte level

✔️ Prevents the electrode from drying out

✔️ Improves measurement accuracy

✔️ Extends pH probe life

✔️ Suitable for laboratory, hydroponic and horticultural applications

❌ Not suitable for gel-filled probes

Benefits

✔️ Maintains maximum pH-measurement accuracy

✔️ Protects electrodes from drying out

✔️ Extends probe service life

✔️ Suitable for both storage and refilling

✔️ Reduces the risk of incorrect readings

✔️ Easy to use

✔️ Suitable for all hydroponic and gardening systems using pH meters with liquid electrolyte

Application

Suitable for:

• pH meters

• pH electrodes with liquid electrolyte

📋 Instructions for use

For storage: Immerse the pH electrode tip in a small amount of solution when the device is not in use. This keeps the membrane moist and prevents loss of accuracy.

For refilling: Follow your pH meter manufacturer’s instructions and top up the electrolyte as needed to maintain the correct level in the electrode.

💡 Urban Botaniks tip: Never store a pH electrode in distilled or reverse-osmosis water. This can damage the membrane and significantly reduce measurement accuracy. For maximum probe life, always use a specialised storage solution such as Growth Technology pH Probe Refill & Storage Solution. 🧪🌱

Buffer solution for calibrating pH measuring devices – pens, monitors and controllers.

• preset accurate and stable pH value: 4.0
• suitable for Bluelab®
• volume: 300 ml

pH measuring devices must be calibrated regularly. Follow the instructions supplied with the device.

For 2-point calibration, use pH Buffer 4 and pH Buffer 7, unless the instructions state otherwise. Store the probe in Growth Technology pH probe storage solution.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

🔹 pH Calibration Solution 4.01 - 300 ml is specially formulated for calibrating pH meters, ensuring accurate and precise measurements. With its stable pH level of 4.01 at 25°C, it is ideal for checking and adjusting measuring instruments used in hydroponics, aquariums, laboratories, and other applications.

🔹 Detailed specifications:

• Volume: 300 ml
• pH value: 4.01 at 25°C
• Application: Calibration of pH meters
• Composition: Complies with international standards for calibration solutions
• Manufacturer: Wather Masters

🔹 Recommendations and instructions for use:

1. Pour a small amount of the solution into a clean container.
2. Immerse the pH meter electrode in the solution.
3. Perform calibration according to the manufacturer's instructions for your pH meter.
4. After use, discard the used solution and do not return it to the original container to avoid contamination.

✅ Benefits of use:

• Accuracy: Provides precise pH measurements.
• Easy to use: Convenient for use in both laboratory and field conditions.
• Compatibility: Suitable for most pH meters on the market.
• Durability: Stable pH value, ensuring reliable calibration of your instruments. 

Buffer solution for calibrating pH-measuring devices - pens, monitors and controllers.

• pre-set, accurate and stable pH value: 7.0
• suitable for Bluelab®
• volume: 300 ml

pH measuring devices must be calibrated regularly. Follow the instructions supplied with the device.

For 2-point calibration, use pH Buffer 4 and pH Buffer 7, unless the instructions state otherwise. Store the probe in Growth Technology pH probe storage solution.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Water Master pH Probe Refill & Storage Solution KCl 300 ml is a professional solution based on potassium chloride (KCl), designed for the proper storage and maintenance of pH probes and electrodes. It keeps the sensitive membrane constantly hydrated, prevents it from drying out and helps maintain the accuracy and long service life of pH measuring instruments.

Proper storage of the pH probe is an essential part of its maintenance. If the glass electrode dries out, its sensitivity gradually decreases, leading to inaccurate measurements, slower response and a shorter service life. Water Master pH Probe Refill & Storage Solution was developed specifically to prevent this problem by keeping the electrode constantly hydrated and ready for use.

The solution is suitable both for storage and for topping up electrolyte in compatible refillable pH probes. After measurement, the electrode should be rinsed with clean or distilled water, then the protective cap should be filled with a small amount of the KCl solution so that the probe tip remains constantly moist.

Water Master KCl Storage Solution is compatible with most pH testers and pH meters using a glass electrode, regardless of the manufacturer. Regular use reduces measurement drift, facilitates calibration and significantly extends the life of the electrode.

Technical specifications

✔️ Manufacturer: Water Master

✔️ Type: Storage and refill solution for pH probes

✔️ Main ingredient: Potassium chloride (KCl)

✔️ Capacity: 300 ml

✔️ Purpose: Storage and maintenance of pH electrodes

✔️ Suitable for most pH meters with a glass electrode

✔️ Prevents the electrode from drying out

✔️ Improves measurement accuracy and stability

✔️ Suitable for home and professional use.

🔧 Applications

Suitable for:

• pH testers

• pH meters

• pH probes

• Hydroponic systems

• Coco substrates

• Soil growing

• Aquaponics

• Aquariums

• Laboratories

• Water quality monitoring.

📋 Instructions for use

1. After completing a measurement, rinse the pH probe with clean or distilled water.
2. Pour a small amount of KCl Storage Solution into the electrode's protective cap.
3. Fit the cap so that the electrode tip remains in constant contact with the solution.
4. If using a refillable probe, top up the solution according to the manufacturer's instructions.
5. Replace the used solution regularly – do not return used liquid to the bottle, to avoid contamination.

⚠️ Important: Never store a pH electrode in distilled or deionised water. This can damage the sensitive membrane and reduce measurement accuracy. Always use a dedicated KCl solution for storage.

💡 Tip from Urban Botaniks: Combine this solution with Water Master pH Probe Cleaner: clean the probe first, then store it in the KCl solution. This will ensure maximum measurement accuracy and significantly extend the life of the pH electrode.

Calibration solution for conductivity (EC) measuring devices – pens, monitors and controllers.

• preset EC value: 1.413 mS/cm
• suitable for Bluelab®
• volume: 300 ml

Electrical conductivity (EC) meters must be calibrated regularly. Follow the instructions supplied with the meter. After use, always rinse the probe with clean water and dry it with a tissue.
The Bluelab Truncheon EC meter does not require calibration! However, it should be checked regularly with this solution. If the reading is low or different from 2.76 mS/cm, the probe tip must be cleaned carefully; also check the batteries.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Calibration solution for electrical conductivity (EC) meters – pens, monitors and controllers.

• preset EC value: 2.76 mS/cm
• suitable for Bluelab®
• volume: 300 ml

Electrical conductivity (EC) meters must be calibrated regularly. Follow the instructions supplied with the meter. After use, always rinse the probe with clean water and dry it with a tissue.
The Bluelab Truncheon EC meter does not require calibration! However, it should be checked regularly with this solution. If the reading is low or different from 2.76 mS/cm, the probe tip must be cleaned carefully; also check the batteries.

Storage conditions:

1. Store in a cool place!
2. Keep out of reach of children!

Growth Technology pH Probe Cleaner is a specialised cleaning solution developed for safe and effective cleaning of pH probes and electrodes, suitable for BLuelab and Milwaukee. It removes accumulated mineral salts, nutrient residues and organic contaminants that can affect measurement accuracy. Regular use extends the life of pH electrodes and maintains maximum measurement accuracy.

Every pH electrode gradually becomes contaminated during use, especially when measuring nutrient solutions, water with high mineral content or organic solutions. Deposits on the sensitive membrane can lead to a slower response, inaccurate measurements and difficult calibration.Growth Technology pH Probe Cleaner was developed specifically to safely remove these contaminants without damaging the electrode's sensitive structure.

Regular cleaning restores the probe's response speed, improves measurement accuracy and reduces the need for premature electrode replacement. The manufacturer recommends that, after each cleaning, the probe be recalibrated using pH 7.0 and pH 4.0 buffer solutions to ensure the most accurate results.

Growth Technology pH Probe Cleaner is suitable for all Bluelab pH probes and pH meters, including Milawaukee and those from other manufacturers.

Technical specifications

✔️ Manufacturer: Growth Technology

✔️ Type: Cleaning solution for pH probes

✔️ Capacity: 300 ml

✔️ Intended use: Cleaning pH and EC electrodes

✔️ Safe for glass pH electrodes

✔️ Removes mineral deposits and organic contaminants

✔️ Improves measurement accuracy

✔️ Extends the service life of pH probes

✔️ Suitable for regular maintenance of measuring instruments.

Benefits

✔️ Effectively cleans pH and EC electrodes

✔️ Improves probe response speed

✔️ Restores measurement accuracy

✔️ Extends the life of pH electrodes

✔️ Reduces the risk of incorrect readings

✔️ Suitable for all Bluelab and Milwaukee pH instruments

✔️ Easy and safe to use

✔️ Ideal for regular maintenance of measuring equipment.

📋 Instructions for use

1. Rinse the pH probe with clean water.
2. Apply a small amount of Growth Technology pH Probe Cleaner to a soft brush or directly onto the electrode.
3. Carefully clean the glass membrane without applying excessive pressure.
4. Rinse thoroughly with clean water.
5. Store the probe in pH Probe Refill and Storage.
6. Before the next use, calibrate with pH 7.0 and pH 4.0 buffer solutions.

⚠️ Important: Never store a pH electrode in distilled or deionised water. After cleaning, use pH Probe Refill and Storage to prevent the sensitive membrane from drying out and maintain measurement accuracy.

💡 Urban Botaniks tip: Clean the pH probe regularly, especially when working with nutrient solutions high in minerals. Combining pH Probe Cleaner, pH Probe Refill and Storage and regular calibration significantly extends the electrode's life and ensures reliable measurements with every use.