Combo Meter

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The BlueLab METCOM is a nearly perfect instrument (at least in the short term). It does what it's expected to, within it's limitations. BlueLab doesn't claim it to be any more or less than it delivers. PH seems very accurate. I calibrate often and it never seems to need it, despite the fact the probes are in a nutrient tank 24/7 (I do give the probe a day a week or so in Kcl solution to hopefully keep it healthy). The TDS meter is fine for it's intended use - nutrient solution maintenance, but isn't precise enough to gauge the quality of raw/RO/DI water, you'll want a cheap pen for that, I use a Membrane Solutions TDS pen and it seems quite accurate down in the sub teen TDS levels (less than 20 bucks and comes with a nice magnetic case). The Thermometer is slow to respond (built into the TDS probe and has high mass) and ok as a very rough idea, but mine is about 3 degrees F high and it only reads full degrees (no tenths). Here my goto is the VEE GEE Scientific 83110 which is a great thermometer (see my review on that). The BlueLab thermometer is plenty accurate and repeatable to tell if you have a chiller problem or such. I don't like not having a comparison/backup for everything, so I just ordered a "2 in 1 Temperature pH Monitor" (Amazon of course) for about forty bucks (20 less than a probe from BlueLab), review in a month or so. (it's 7/21) This unit lets you check in on your Hydro system anytime you wish with the press of a button per reading, 3 hits and I've got PH, TDS and Temp, and I know it's all OK or if I need to look into a problem. No rinsing, opening tanks, checking calibration or any of that pen stuff, and zero risk you'll drop the pen in. The whole PH pen thing is just a PIA and discourages frequent checks. The pens are less precise in general unless you spend almost as much as you will for this handy device, and the probes are often not replaceable. Ph probes by design have a limited life. Always keep litmus paper or a dropper kit on hand, JIC. BlueLab products are moderately priced, very reliable and fairly accurate (but highly repeatable). That fits the needs of a lot of users. If you are a fit, this is a great solution, I am, and I will be using BlueLab instruments in the future.

Good product. Better then the ph pens. There’s a limited amount of tests a ph tester can perform as they leach a liquid from inside. The pens reserve of test fluid is much smaller then the ph tester on this model. The ph probes are fragile and if you ever break one (which you probably will) the replacements are only 70$ for this model vs $120 for a ph pen. More upfront but also more features that plants care about such as water temp (not to cold, not to hot or your plants go into shock) and saturated nutrients measured in EC and ppm in both the 500/700 scale. You can also pick up a quality storage case by bluelab for only $40 to help protect your investment. Trust me after breaking my last ph pen from a clumsy drop you will want both a replaceable ph style probe type meter and the storage case to go along w/ it. Blue lab is the only water testing product that any good hydro store will recommend. You get what you pay for and if your doing hydro or organic growing an accurate ph is the difference between lifeless unproductive plants vs vigorous high yielding guerillas. Don’t forget to acquire some ph test storage solution as this is not included. Don’t bother getting any calibration fluid. Your local hydro store most likely will perform this for you at no cost. Be sure to calibrate at least every month/two months for accuracy.

will never go back, brilliant solution that makes the metering process easy.

Das Bluelab METCOMPLUS Combo Meter Plus hat mich absolut überzeugt. Es misst zuverlässig pH-Wert, Leitfähigkeit und Temperatur. Für jeden, der Hydroponik, Indoor-Anbau oder anspruchsvolle Pflanzenpflege betreibt, ist es ein nützliches Messgerät. Die Handhabung ist sehr einfach, die Kalibrierung unkompliziert und das Display übersichtlich. So lassen sich alle Messwerte schnell und präzise ablesen, was die Kontrolle der Nährstoffzufuhr deutlich erleichtert. Besonders praktisch ist, dass das Gerät sowohl für Wasserlösungen als auch für Bodentests verwendet werden kann – mann muss nur das entsprechende Messmodul anstecken. Die Verarbeitung wirkt robust und langlebig, das Gerät liegt gut in der Hand und fühlt sich professionell an. Wer auf exakte Messungen angewiesen ist und das Beste für seine Pflanzen möchte, wird mit diesem Combo Meter voll zufrieden sein. Absolut empfehlenswert für Hydroponik, Indoor-Gärten oder jeden Hobbygärtner, der auf Präzision und Qualität setzt. Ich würde es jederzeit wieder kaufen!