What does the Aqua Master P160 Pro Combo Meter measure?
The P160 Pro measures pH, EC, PPM (700 scale), TDS (in PPT), and temperature in liquids. It’s perfect for nutrient tanks, reservoirs, buckets, aquariums, and runoff samples. It helps prevent issues like nutrient lockout by keeping your pH and EC levels in range.
What’s the difference between EC, PPM, and TDS on this meter?
EC is the raw conductivity reading. PPM is a converted value using the 700 scale (so it may differ from other meters), and TDS is shown in parts per thousand (PPT), not ppm. For the most accurate comparisons, rely on EC.
What are the measurement ranges and accuracy for the Aqua Master P160 Pro?
It measures pH 0.0–14.0 (±0.1), EC 0.0–19.9 mS/cm (±2%), PPM 0–1999 (700 scale), TDS 0.00–19.99 PPT, and temperature 0–50°C (±0.5°C). Automatic temperature compensation (ATC) helps stabilize EC readings as water temperature changes.
Is the Aqua Master P160 Pro waterproof and durable?
Yes—it’s IP67 rated for waterproofing and floats if dropped. It also includes auto shut-off, a low battery indicator, and uses AG-13/LR44 batteries. Most kits include a hard case and calibration solutions to get started.
How do I calibrate the Aqua Master P160 Pro?
For pH, use automatic 2-point calibration with pH 7.0 first, then pH 4.0. For EC, it uses manual calibration via a small screw—1413 µS/cm is the common standard, but you can calibrate with 2.77 or 3.0 EC solutions if closer to your typical range.
How often should I calibrate, and what’s the right way to do it?
Calibrate monthly, or more often if testing daily or using organics. Always pour calibration liquid into a clean cup, rinse between steps, and discard used solution—never reuse or dip into the bottle.
What’s the correct way to get accurate readings?
Mix your nutrients fully, test EC first, adjust, then pH last. Swirl gently to remove bubbles and avoid placing the meter near air stones or dosing outlets. Wait for stable numbers before recording a reading.
Can I test straight concentrates with the Aqua Master P160 Pro?
No—avoid measuring undiluted pH adjusters or nutrient concentrates. They can damage the electrode and return false readings. Always test in well-mixed, diluted solutions.
Does the Aqua Master P160 Pro have a replaceable electrode?
Yes—it uses a replaceable pH/EC electrode. If readings drift, stabilise slowly, or fail to calibrate even after cleaning, it’s likely time for a replacement. Just swap the probe and recalibrate to get back on track.
How should I store the Aqua Master P160 Pro when not in use?
Even with a dry-storage design, it’s best to keep the cap clean and use KCl storage solution if possible. Avoid storing in plain or distilled water, and don’t let the cap area dry out completely.
How do I clean the Aqua Master P160 Pro electrode?
Rinse with clean water, use a proper electrode cleaner if needed, rinse again, then recalibrate. A short soak in storage solution can help revive slow or neglected sensors. Clean more often if you're using organic nutrients.
Why does my pH drift while EC stays stable?
pH sensors are more sensitive and need regular cleaning, calibration, and proper storage. EC probes are generally more forgiving unless they get crusted with salts or biofilm.
What’s the best place in a reservoir to take readings?
Test in well-mixed water away from air stones or dosing outlets, where bubbles and concentrated additives won’t skew your results. Always wait for the numbers to settle before trusting them.
What’s the simplest routine to keep the P160 Pro accurate?
Rinse after each use, calibrate regularly, store the cap clean with KCl solution if possible, and clean the probe when readings get slow. Consistent maintenance means consistent results.
What are common mistakes when using the Aqua Master P160 Pro?
Skipping calibration, reusing dirty calibration fluid, storing the electrode dry, and trusting unstable numbers are the biggest issues. The meter is precise—but only if you take care of it.
