bluelab ph pen
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Market size
Good$419K$419K/yr · 60K searches
Review moat
Good1,276.27avg incumbent reviews — the moat a new listing must climb
Avg price
Good$159.86avg listing price — sweet spot $15–$100
Conversion
Good4.4%search→purchase rate — share of searches ending in a sale
Returns
Okay3.7%return rate — above 5% kills the launch gate
Growth
Okay+1.6%90-day search growth — must beat 0% to launch
Price range
Bad$43.50–$352.72cheapest to priciest tracked listing — scored on the share inside $15–$100
Competition
Bad80%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, bluelab ph pen is a $419K/yr Amazon United States market (60K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 38/100.
Data updated Jul 14, 2026 · scored weekly · How we score niches
bluelab ph pen market data
- Units sold / yr
- 2K–2K
- avg 100–250/product
- Revenue / yr
- $240K–$320K
- units × avg price
- Conversion rate
- 4.4%
- Avg BSR
- #48
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 3.5%
- Avg brand age
- 62 months
- Avg seller age
- 164 days
Competition & brand share
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.Brands
2 falling
Sellers
9
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
80%
Top 20: 100%
Open market
0%
- Bluelab96%
- Apera Instruments4%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 93 weeks — +1.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.3×
Top bluelab ph pen search terms
- bluelab ph pen24K/yr
- blue lab ph pen17K/yr
- bluelab9K/yr
- bluelab ph meter5K/yr
- blue lab4K/yr
Top bluelab ph pen products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 11 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bluelab pH Pen - 0.1 pH Accurate Durable Double Junction Probe Waterproof & Floats Auto Temperature Compensation Easy Calibration - Made in NZ
Bluelab$94.804.4★4,774 rev
Bluelab pH Pen Meter and Probe Care Kit pH with Calibration Supplies Storage Solution & Brush Reliable Digital Tester for pH Temperature in Growing Solutions Optimal Plant Health and Yield
Bluelab$112.974.3★233 rev
Bluelab pH PenPlus Replaceable Probe pH & Temperature Meter IP68 Waterproof Backlit Display Easy 2-Point Calibration Includes Calibration & KCl Storage Solution Made in NZ
Bluelab$113.894.4★28 rev
Bluelab Guardian Monitor Wi-Fi for Real-time pH Temperature and Conductivity (TDS) Measurements in Water with Calibration 3 in 1 Digital Nutrient Meter for Hydroponic Systems and Indoor Plant Grow
Bluelab$352.724.1★51 rev
Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement Waterproof Pens and Probe Care Kit
Bluelab$189.664.4★1,208 rev
Newest
by launch dateBluelab pH PenPlus Replaceable Probe pH & Temperature Meter IP68 Waterproof Backlit Display Easy 2-Point Calibration Includes Calibration & KCl Storage Solution Made in NZ
Bluelab$113.8928 rev
Bluelab OnePen - a 3-in-1 Temperature EC/PPM and pH Meter Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe
Bluelab$244.7179 rev
Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement Waterproof Pens and Probe Care Kit
Bluelab$189.661,208 rev
Bluelab pH Pen Meter and Probe Care Kit pH with Calibration Supplies Storage Solution & Brush Reliable Digital Tester for pH Temperature in Growing Solutions Optimal Plant Health and Yield
Bluelab$112.97233 rev
Bluelab Guardian Monitor Wi-Fi for Real-time pH Temperature and Conductivity (TDS) Measurements in Water with Calibration 3 in 1 Digital Nutrient Meter for Hydroponic Systems and Indoor Plant Grow
Bluelab$352.7251 rev
Trending
90-day click momentumBluelab pH PenPlus Replaceable Probe pH & Temperature Meter IP68 Waterproof Backlit Display Easy 2-Point Calibration Includes Calibration & KCl Storage Solution Made in NZ
Bluelab$113.894.4★
Bluelab pH Pen - 0.1 pH Accurate Durable Double Junction Probe Waterproof & Floats Auto Temperature Compensation Easy Calibration - Made in NZ
Bluelab$94.804.4★
Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit Replaceable Probe 0.01 pH Accuracy Lcd display
Apera Instruments$79.254.5★
Bluelab pH Pen Meter and Probe Care Kit pH with Calibration Supplies Storage Solution & Brush Reliable Digital Tester for pH Temperature in Growing Solutions Optimal Plant Health and Yield
Bluelab$112.974.3★
Bluelab pH 4.0 & 7.0 Calibration Solution Kit - pH Meter & pH Pen Calibration for Balanced Nutrient Solution NIST Traceable | Hydroponics Gardening & Growing Tents (500 ml/ 16.9 Fl Oz Each)
Bluelab$43.504.7★
What buyers say about bluelab ph pen
What buyers praise and complain about, mined from review topics.What buyers love
“Easy to operate”
“The build quality is excellent”
“very easy to read the display”
“completely waterproof”
“Definitely worth the money”
“It's easy to us and durable”
“Solid and accurate”
“Clear instructions”
“Seems to work well and well engineered”
“Seems to work well and well engineered”
What buyers complain about
“ends up expensive”
“it will not work”
“quality control let this pass”
“Dont last long”
“know that glass is thin”
“It took some getting used to”
“This is when I notice the cheaper meters are very inaccurate”
“The water is very cold here when it first comes out of the tap”
“it took me an hour to set this meter up before I could get to my samples”
“Almost like its not written in the instructions”
Top return reasons
Common questions
- Is bluelab ph pen profitable to sell on Amazon United States?
- The niche generates $419K/yr across 11 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +1.6%. Flapen's verdict: Skip it (38/100).
- How competitive is the bluelab ph pen niche?
- 2 brands and 9 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in bluelab ph pen?
- Top complaints mined from reviews: Value For Money, Functionality-Overall, Quality-Overall. The return rate is 3.7%.
- When does demand for bluelab ph pen peak?
- Demand is steady year-round — the busiest month runs 1.3× the quietest.
- What does it cost to enter the bluelab ph pen niche?
- Listings span $43.50–$352.72; the average listing price is $159.86 (sweet spot $15–$100). The average incumbent carries 1,276 reviews — the moat a new listing must climb.