What does the Aqua Master P110 Pro Combo Meter measure?
It measures pH, EC (electrical conductivity), and temperature in liquid solutions. It’s designed for use in hydroponic reservoirs, mixing tanks, aquariums, ponds, runoff samples, and more. It does not display PPM or TDS directly.
What are the measurement ranges and accuracy?
pH: 0.1–14.0 (±0.1), EC: 0.0–19.9 mS/cm (±2%), Temperature: 0–50°C (±0.5°C). It features automatic temperature compensation (ATC) to keep EC readings stable when water temperature changes.
Is the Aqua Master P110 Pro waterproof and durable?
Yes—it’s IP67 waterproof and floats if dropped. It has an auto shut-off after about 8 minutes, a low battery indicator, and uses three 1.5V AG-13 button batteries.
Does it need calibration out of the box?
It may come pre-calibrated, but it's best to calibrate it before first use—especially after shipping or storage. This ensures accuracy from day one.
How do I calibrate the Aqua Master P110 Pro?
Use 2-point automatic calibration for pH with fresh pH 7.0 and 4.0 solutions (in that order). For EC, it uses 1-point calibration with 1413 µS/cm. Stick to 1413 for calibration; other solutions can be used as a reference check.
How often should I calibrate, and what’s the right method?
Calibrate monthly—or more often if you test frequently or use organic nutrients. Always pour calibration solution into a clean cup, rinse between steps, and don’t reuse solution. Dipping into the bottle contaminates it.
Is the electrode replaceable, and how do I know when?
Yes—the electrode is replaceable. If readings drift, fail to calibrate, or take forever to stabilise even after cleaning, it’s time to replace. Swap the probe and recalibrate to restore accuracy.
Does it require storage solution or special care?
It’s designed for dry storage, but keeping the cap area clean and not letting salts crust over still matters. Using KCl storage solution can extend probe life even with a dry-storage design.
How do I get accurate readings?
Use a well-mixed sample, fully submerge the sensor, gently swirl to remove bubbles, and wait for the reading to stabilise. Measure EC first, adjust, then pH. Always recheck after mixing.
Why does pH drift or EC rise over time?
pH drifts while nutrients and adjusters equilibrate—especially in large tanks. EC can rise from evaporation or drop from top-ups. These are normal—monitor and adjust as needed.
Why does the meter take time to stabilise?
Cold water, sensor fouling, air bubbles, or a probe needing calibration can all slow reading stability. Clean and calibrate regularly to keep performance sharp.
Can I test directly in the reservoir, or should I use a sample cup?
Both work. Sample cups reduce contamination and are ideal when testing multiple tanks. Always test in a well-circulated area—not near air stones or dosing outlets.
Can it be used with organic nutrient systems?
Yes, but organics can coat sensors faster. Plan for more frequent cleaning and calibration checks if you’re running organic feeds or bio-based systems.
How should I clean the meter?
Rinse with clean water. If buildup is visible or readings go weird, use an electrode cleaner, rinse again, and recalibrate. Never scrape the probe or let salt crust dry on it.
What’s the best-practice routine for reliable readings?
Rinse before/after each use → measure in a mixed sample → keep the cap clean → calibrate pH (7 & 4) and EC (1413) monthly → clean the probe if readings slow or drift. Treat it right, and it’ll stay accurate.
