APERA Instruments PH20 pH meter – Your reliable partner for precise pH measurements! Whether for hydroponics, water treatment or swimming pools – with this hand-held measuring device you will always make the right decision. Perfectly matched for use with the DrainMaster Drip Stand.
🔬 Precision to the point: Experience stable measurements in the range from 0.0 to 14.0 pH. The PH20 impresses with its waterproof housing (IP67), ideal for humid environments.
🌡️ Smart design: The automatic temperature compensation (ATC) ensures accurate results from 0-50°C. The large LCD displays pH value and temperature simultaneously. Automatic switch-off after 8 minutes saves battery life.
💼 Everything included: calibration solutions, batteries and a carrying strap are included in the practical carrying case. Everything you need for your measurements, compact and ready to hand.
🌏 Quality and reliability: APERA Instruments, an ISO 9001:2015 certified manufacturer, brings over 30 years of experience to the development of this pH meter. With the 2-year manufacturer’s warranty (6 months on the electrode) you are on the safe side.
💧 Compatibility: Ideal for use with the DrainMaster Drip Stand. Measurement technology that suits your green lifestyle.
🌟 PH20 – Not just a measuring device, but a statement for precision and quality. Get the APERA Instruments PH20 pH meter now and experience accuracy that exceeds your expectations!
We are an authorized dealer of APERA Instruments Germany and you can be sure that you will receive a new original product from us.
- pH
- Measuring range: 0 to 14.0
- Resolution: 0.1
- Accuracy: ±0.1
- Calibration: Automatic 1 to 3-point calibration
- Temperature compensation: 0 to 50 °C (automatic)
- Temperature
- Measuring range: 0 to 50 °C
- Resolution: 0.1 °C
- Accuracy: ±0.5 °C
- Further information
- System supply: 4 × AAA batteries
- Operating time: Up to 1000 hours
- Housing protection class: IP67 (waterproof and floatable)
- Dimensions: 40×31×178 mm (with case 190×165×40 mm)
- Weight: 107 g (with case 448 g)
A complete set contains:
- PH20 measuring device
- 4 x AAA batteries
- Calibration solutions (pH 4.00; pH 7.00 per 50 ml)
- Carrying strap
- Carrying case
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Calibration Solutions, pH & EC Meters
-10%Regular price: 52,30 €47,08 €Includes 19% MwSt.plus shippingAdd to cart -
Calibration Solutions, pH & EC Meters
-10%Regular price: 37,10 €33,40 €Includes 19% MwSt.plus shippingAdd to cart
Frequently Asked Questions
How accurate is the Apera PH20?
The PH20 measures pH from 0.0 to 14.0 with an accuracy of ±0.1 pH. That is more than enough for checking irrigation water and runoff in growing, where target windows such as 5.8 to 6.2 matter rather than the second decimal place. Automatic temperature compensation (ATC) corrects for temperature effects between 0 and 50 °C, so cold tap water and warm nutrient solution both read reliably. If you need ±0.01 pH for lab-grade work, step up to the PH60 from the premium series.
Do I need to calibrate the PH20, and how often?
Yes, like every pH meter. The matching calibration solutions (pH 4.01 and 7.00) are included in the box. Calibration takes about two minutes: dip the electrode into the buffer and the meter recognises the value automatically. For daily use in a grow we recommend calibrating every one to two weeks, and always before an important measuring session. Store the electrode wet, ideally in 3M KCl storage solution, and it will stay accurate for much longer.
Is the PH20 waterproof?
Yes. The housing is IP67 rated: it survives dust and temporary submersion down to one metre, and it even floats. If it drops into your reservoir, nothing happens. That makes it a perfect match for the humid environment of a grow tent or for measuring directly in a DrainMaster drip tray. After measuring, rinse the electrode briefly with distilled water and put the cap back on.
What is included in the box?
Everything you need to start measuring right away: the PH20 itself, calibration solutions (pH 4.01 and 7.00), four AAA batteries and a lanyard, all packed in a sturdy carrying case. Thanks to the 8-minute auto-off, the batteries last for months. Refill bottles of calibration solution (250 ml) are available in our shop.
Why measure pH when growing at all?
pH determines which nutrients your plant can actually absorb. Outside the target window (roughly 6.0 to 6.8 in soil, 5.8 to 6.2 in coco and hydro), individual nutrients lock out even though they are present in the solution, and you get deficiency symptoms despite feeding. Measuring both irrigation water and runoff, for example with the DrainMaster drip-tray system, reveals such problems before the plant shows them.
PH20 vs. PH60: which one should I buy?
The PH20 is the value model: ±0.1 pH accuracy, 0 to 14 range, fixed electrode. The PH60 is the premium class: ±0.01 pH, -2 to 16 range, a replaceable PH60-E electrode and a three-colour display. For hobby grows the PH20 is fully sufficient. The PH60 pays off if you want maximum precision or plan to use the meter for many years, because you simply replace a worn electrode instead of buying a new device.
Not sure which meter fits? → Read the full Apera comparison: PH20 vs PH60 vs EC20 vs EC60 vs PC60-Z
