Five Readings and Swappable Probes with the Aqua Master H600 Pro Handheld Meter
The Aqua Master H600 Pro is a handheld meter that reads pH, EC, PPM, TDS and temperature through two separate plug-in probes, accurate to ±0.1 pH and ±2% on EC. It calibrates itself, reminds you when it's due, holds a reading on screen and comes in a carry case with a 9V battery, ready to go.
Why You Need It
On a pen meter, the pH and EC sensors live and die together. pH glass wears out long before an EC sensor does, so when it goes, you're replacing parts that were working fine.
The H600 Pro keeps them apart. The pH probe plugs in on a BNC connector (a twist-lock plug) and the EC probe on a small pin connector, so a worn probe is a quick swap, not a new meter. It also takes Aqua Master's substrate probes if you want to test straight into your media later.
Is the H600 Pro Right for Your Setup?
- Several reservoirs or a busy grow room: a bigger screen, a HOLD button and probes on cables make repeat testing quicker.
- Testing coco or soil directly? Choose the H600 Pro Substrate Meter, which comes with spike probes.
- Just want a quick pocket check? The P110 Pro2 Combo Pen fits in a pocket and stores dry.
How the H600 Pro Works
The meter reads both probes and shows each value at the press of a button. ATC (automatic temperature compensation) corrects readings from 0 to 50°C. pH calibrates automatically at two points (4.0 and 7.0), EC at one point (1.413 mS/cm), and a reminder pops up 30 days after your last calibration.
Key Benefits
- Separate probes: replace a worn pH probe without touching the EC probe.
- Five readings: pH, EC, PPM, TDS and temperature from one meter.
- Automatic calibration: it recognises the buffer and sets itself for pH and EC.
- HOLD button: freeze a reading so you can lift the probe and write it down.
- Substrate ready: accepts Aqua Master spike probes for testing coco, compost and grow bags.
- Waterproof probes: IP67 rated, so they can be fully dunked.
- Carry case included: keeps the kit together and the glass in one piece.
Contains
- 1 x H600 Pro handheld meter
- 1 x pH probe with BNC connector
- 1 x EC probe with small pin connector
- 1 x Carry case and 9V battery
Not included: calibration solutions and KCl storage solution.
H600 Pro Specifications
| pH | 0.1 to 14.0 pH, ±0.1 pH |
|---|---|
| EC | 0.0 to 19.9 mS/cm, ±2% of full scale |
| TDS | 0 to 19.99 ppt |
| PPM | 0 to 1,999 (700 scale) |
| Temperature | 0 to 50°C, ±0.5°C |
| Calibration | pH automatic 2-point (4.0 and 7.0), EC automatic 1-point (1.413 mS/cm) |
| Waterproof rating | Probes IP67, meter IP62 (splash resistant) |
| Power | 1 x 9V battery, included |
| Size and weight | 210 x 120 x 60mm, 430g |
| Warranty | 1 year meter, 6 months probes |
How To Use the H600 Pro
- Soak the pH probe: before first use, stand it in tap water for at least 12 hours.
- Calibrate: pH in 7.0 then 4.0 buffer, EC in 1.413 solution. The meter recognises each and sets itself.
- Test: dip both probes, let the numbers settle and hit HOLD if you need to note them.
- Adjust: set EC first, then pH, because nutrients move pH.
- Store: rinse, add a few drops of KCl storage solution to the pH probe cap and keep the meter dry.
Top tip: Feed charts quoting PPM need care. The H600 Pro uses the 700 scale, and plenty of charts use 500, so the same tank can look 40% stronger or weaker depending on the chart. Work in EC and you'll never get caught out.
FAQs
Can I drop the H600 Pro in the reservoir?
Keep the meter out of the water. The probes are IP67 and fully waterproof, but the meter body is IP62, which means splash resistant only.
What happens above 1,999 PPM?
That's the top of the PPM range on the 700 scale, roughly EC 2.8. Above that, read EC instead, which goes up to 19.9 mS/cm.
Can I test coco or soil with it?
Yes, with the substrate spike probes, sold separately in our Aqua Master replacement probes range.
Need help choosing? Call our growing experts on 01782 749955 or visit One Stop Grow Shop Stoke at Fenton Trade Park.
A meter you repair, not replace. Browse our full range of pH and EC meters.
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