Bluelab OnePen
#6 in Pen testersFull review
A connected pen for serious hydroponic growers who want pH and nutrient readings logged to their phone. Most buyers get more for less from the Apera PC60.
Amazon $249$249
±0.05 pH2-pointEC/TDS
4 Bluelab ph meters ranked. Each one is scored and ranked against every brand in its type, so "#3 mid-size" means third of all mid-size ph meters here, not third among Bluelab's own.
Bluelab makes 4 current ph meters: 3 pen testers and 1 portable meters. Prices run from $89.95 for the Bluelab pH Pen to $279.99 for the Bluelab Combo Meter. Its best-rated model in each size: the Bluelab OnePen (#6 of 13 pen testers, rated 3.4) and the Bluelab Combo Meter (#7 of 8 portable meters, rated 3.1).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Bluelab ph meters 4
- Bluelab OnePen#6 pen testersFull review
A connected pen for serious hydroponic growers who want pH and nutrient readings logged to their phone. Most buyers get more for less from the Apera PC60.
Amazon $249$249±0.05 pH2-pointEC/TDS - Bluelab Combo Meter#7 portable metersFull review
A grower’s meter for checking pH and nutrient strength in reservoirs. It has the longest warranty here.
Amazon $279.99$279.99±0.1 pH2-pointEC/TDS - Bluelab pH PenPlus#12 pen testersFull review
The Bluelab pH Pen with a replaceable probe and a longer warranty, for growers who want a pen that lasts. Pick the Apera PH60 if you need finer resolution.
Amazon $115$115±0.1 pH2-pointNone - Bluelab pH Pen#13 pen testersFull review
A simple, tough pen for growers checking nutrient pH. The PenPlus costs a little more and adds a replaceable probe.
Amazon $89.95$89.95±0.1 pH2-pointNone
