Growth Technology PH Probe Refill & Storage – 300ml
- Growth Technology – Professional quality products for professional results
- Specially designed to care for your pH probe when not in use
- Helps to ensure accurate readings
- Maintains pH probe lifespan
- Easy to use – simply wet electrodes before storage or use in the probe cap
- Can be used with virtually any brand of pH meter
- A must-have for serious growers
If your pH probe dries out during storage, it’s accuracy and lifespan are likely to be drastically reduced. Keep your pH probe in good condition by wetting and storing the probe in Growth Technology’s specially designed storage solution.
Growth Technology pH probe cleaner is a special storage solution containing dilute potassium chloride. By storing your pH meter probes in the storage solution, the probes will be kept wet and in good condition. Keeping your pH meter probes wet is essential for accurate readings and maintaining the lifespan of your pH probes.
This should be a regular procedure to ensure the best results from the meter.
Always shake the bottle well before use.
After using your pH meter, clean the ends (preferably using Growth Technology’s pH Probe Cleaner) and then wet the probe in pH Probe Refill and Storage Solution. Depending on the meter, you may be able to pour a little storage solution into the protective probe cap before storing in order to keep the probe wet. Rinse the probe and shake dry before using and discard any used solution.
Do not return any used solution to the bottle as this will contaminate the remaining solution.
Conversions: 1 Teaspoon = 5mL | 1 Tablespoon = 15 mL | 1 Ounce = 30mL | 1 Cup = 240 mL
Often the pH meters are used in applications, which require regular cleaning of the electrode. These applications involve very hard waters, dirty samples like soil slurries, viscous materials or samples with high oil and protein content. We do not recommend these procedures for persons unfamiliar with or unable to use safe techniques involving these chemicals: Detergents, HCl (Hydrochloric Acid), and NaOH (Sodium Hydroxide).
How a pH meter works
When one metal is brought in contact with another, a voltage difference occurs due to their differences in electron mobility. When a metal is brought in contact with a solution of salts or acids, a similar electric potential is caused, which has led to the invention of batteries. Similarly, an electric potential develops when one liquid is brought in contact with another one, but a membrane is needed to keep such liquids apart.
A pH meter measures essentially the electrochemical potential between a known liquid inside the glass electrode (membrane) and an unknown liquid outside. Because the thin glass bulb allows mainly the agile and small hydrogen ions to interact with the glass, the glass electrode measures the electrochemical potential of hydrogen ions or the potential of hydrogen. To complete the electrical circuit, also a reference electrode is needed. Note that the instrument does not measure a current but only an electrical voltage, yet a small leakage of ions from the reference electrode is needed, forming a conducting bridge to the glass electrode. A pH meter must thus not be used in moving liquids of low conductivity (thus measuring inside small containers is preferable).
The pH meter measures the electrical potential (follow the drawing clock-wise from the meter) between the mercuric chloride of the reference electrode and its potassium chloride liquid, the unknown liquid, the solution inside the glass electrode, and the potential between that solution and the silver electrode. But only the potential between the unknown liquid and the solution inside the glass electrode change from sample to sample. So all other potentials can be calibrated out of the equation.
Caring for a pH meter depends on the types of electrode in use. Study the manufacturer’s recommendations. When used frequently, it is better to keep the electrode moist, since moisturising a dry electrode takes a long time, accompanied by signal drift. However, modern pH meters do not mind their electrodes drying out provided they have been rinsed thoroughly in tap water or potassium chloride. When on an expedition, measuring seawater, the pH meter can be left moist with sea water. However, for prolonged periods, it is recommended to moist it with a solution of potassium chloride at pH=4 or in the pH=4.01 acidic calibration buffer. pH meters do not like to be left in distilled water.
Note that a pH probe kept moist in an acidic solution, can influence results when not rinsed before inserting it into the test vial. Remember that a liquid of pH=4 has 10,000 more hydrogen ions than a liquid of pH=8. Thus a single drop of pH=4 in a vial measuring 400 drops of pH=8 really upsets measurements! Remember also that the calibration solutions consist of chemical buffers that ‘try’ to keep pH levels constant, so contamination of your test vial with a buffer is really serious.
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About Growth Technology
The Nutrient Company
Growth Technology has been developing innovative horticultural products since it was founded in 1985. The company has a wide range of products but nutrient solutions have always been the core of the business. In recent years there has been an increasing focus on orchids, chillies and other specialist plants – creating products for enthusiasts who understand the need for them.
Plant nutrients and propagation are at the heart of what we do. Our plant nutrition is both plant-specific and system specific ensuring that we continue to push the boundaries of what is possible within the confines of your own garden and beyond. Whether you’re a professional or a hobbyist with a passion for plants, our groundbreaking products will help your garden to truly achieve its potential. Whether you are a soil, coco or hydroponic grower, our products ensure perfect plants with bumper crops – this is what we specialise in.
Growth Technology prides itself on providing exclusive products of the highest quality, accompanied with great service, delivery and support. The company has its headquarters based in a 60,000 square foot facility on Great Western Way, just outside Taunton in Somerset.