pH & Conductivity Starter Pack by Bluelab — Complete pH, EC & Temperature Testing Kit
BL-MTR-PENSTP
Pairs well with
The Bluelab pH and Conductivity Starter Pack puts the two measurements every grower needs in one box: pH tells you whether your plants can actually absorb their food, EC tells you how much food is in the water. You get the Bluelab pH Pen, the Bluelab Conductivity Pen, and the full Probe Care Kit with everything needed to hydrate, calibrate, clean and store both pens — plus access to the Bluelab Grow Book. One purchase, complete reservoir control from day one.
What's in the Box
pH and temperature meter, double-junction probe
EC, ppm 500 (TDS), ppm 700 and temperature meter
pH 7.0, pH 4.0 and KCl storage solution sachets, 2.77 EC standard solution, probe cleaners, cleaning instruments and cups
Access to Bluelab's growing guide, built from 30+ years of experience
Specifications
0.0–14.0 pH, ±0.1 pH accuracy at 25°C
Double-junction, not replaceable
Manual 2-point (pH 7.0 first, then 4.0 or 10.0), 30-day calibration reminder on screen
0.0–10.0 EC / 0–5000 ppm (500) / 0–7000 ppm (700), ±0.1 EC accuracy
Factory calibrated — manual calibration optional
0–50°C on both pens, Automatic Temperature Compensation
Fully waterproof, backlit LCD, hold function, auto off — both pens
1 x AAA alkaline per pen (approx. 350 hours each)
1-year limited warranty on both pens
Bluelab, New Zealand
- Bluelab's manual puts it bluntly: if it dries, it dies. Before first use, stand the pH Pen upright in a small container with enough KCl storage solution (included in your care kit) to submerge the probe tip, and soak for at least 24 hours. Never use RO, distilled or deionised water — pure water kills the probe.
- Every week, add 3–5 drops of KCl solution into the wetting seal inside the storage cap, and always rinse the probe in fresh water before recapping after use.
- The Conductivity Pen needs none of this — no glass bulb, no hydration. Just rinse it after each use and clean the probe face fortnightly with the included cleaner or an unscented cream cleanser like Jif.
Getting Started
Pairs Well With
Restock pH 7.0/4.0 sachets, KCl storage solution and 2.77 EC standard when the care kit runs out.
pH Up & DownOnce you can measure pH, you need to adjust it — dosing solutions in the Water Control range.
NutrientsBase nutrients and additives — dial in exact EC targets instead of feeding blind.
Starter KitsSetting up a full grow? Browse complete starter kits for tents, lighting and nutrients.
Frequently Asked Questions
Is the starter pack ready to use out of the box?
Partly. The Conductivity Pen is factory calibrated and ready immediately. The pH Pen needs a minimum 24-hour hydration soak in the included KCl storage solution, then a 2-point calibration with the included pH 7.0 and 4.0 sachets before its first reading.
What's included in the Probe Care Kit?
The pH and Conductivity care kit contains pH 7.0, pH 4.0 and KCl storage solution sachets, 2.77 EC standard solution, probe cleaners, cleaning instruments and plastic cups — everything to hydrate, calibrate, clean and store both pens.
Is the pH Pen's probe replaceable?
No. The pH Pen uses a fixed double-junction probe. If you want a pen with a replaceable probe, look at the Bluelab pH PenPlus — when its probe eventually wears out you screw in a new one instead of replacing the pen.
Are the pens waterproof?
Yes, both pens are fully waterproof and float, provided the battery cap is fastened down with no gap between cap and body.
Is the pack better value than buying the pens separately?
Yes. The pack costs only a few dollars more than the two pens alone and includes the full Probe Care Kit — the KCl storage solution and pH calibration sachets the pH Pen must have before its first reading, plus the 2.77 EC standard, probe cleaners and cups. Buy the pens bare and you're purchasing those solutions separately anyway.
How often does the pH Pen need calibrating?
Calibrate before first use, after every clean, after changing the battery, and whenever the check mark disappears from the screen — it fades 30 days after the last calibration as a built-in reminder. Always 2 points: pH 7.0 first, then 4.0 or 10.0.
Measure the Fundamentals From Day One
Two Bluelab pens, full care kit, 1-year warranty on both. Free shipping over $499*.