---
title: "Bluelab Ph Pen — $419K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/bluelab-ph-pen"
last_updated: "2026-08-09T13:11:58.124Z"
locale: en
meta:
description: "Niche score 38/100 · $419K/yr market · 60K searches/yr · $159.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 38/100 · $419K/yr market · 60K searches/yr · $159.86 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Bluelab Ph Pen — $419K/yr Amazon US Niche (2026) - Flapen"
---
# **bluelab ph pen**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 56Growth 27Conversion 53Competition 17Returns 41Price range 18Avg price 55Brand share 0Review moat 56Quality gap 67
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****$419K**
$419K/yr · 60K searches
**Review moat**
**Good****1,276.27**
avg incumbent reviews — the moat a new listing must climb
**Avg price**
**Good****$159.86**
avg listing price — sweet spot $15–$100
**Conversion**
**Good****4.4%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Okay****3.7%**
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–$352.72**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Bad****80%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
top-5 brand share — brand-locked demand
**Signals**[** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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.
1K750Spike '24Holiday '24Prime Day '25Spike '25Black Friday '25 seasonDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.3×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/bluelab-ph-pen/trend)
## **Top bluelab ph pen search terms**
- **bluelab ph pen**24K/yr+5.9%2.9% conv. - **blue lab ph pen**17K/yr+13.5%2.7% conv. - **bluelab**9K/yr-14.9%1.6% conv. - **bluelab ph meter**5K/yr-22.0%3.0% conv. - **blue lab**4K/yr-5.8%2.6% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/bluelab-ph-pen/search-terms)
## **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.
0%15%$63K30%$126K45%$189K60%$252K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Bluelab pH Pen - 0.1 pH Accurate Durable Double Junction Probe Waterproof & Floats Auto Temperature Compensation Easy Calibration - Made in NZ**Bluelab**$94.80**4.4★4,774 rev](https://www.amazon.com/dp/B005POOJHG) [2**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**$112.97**4.3★233 rev](https://www.amazon.com/dp/B0CCXMNGST) [3**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**$113.89**4.4★28 rev](https://www.amazon.com/dp/B0GT1TTM6G) [4**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**$352.72**4.1★51 rev](https://www.amazon.com/dp/B0CCQ3SHBW) [5**Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement Waterproof Pens and Probe Care Kit**Bluelab**$189.66**4.4★1,208 rev](https://www.amazon.com/dp/B0CFZXMF53)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**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**$113.89**28 rev3mo ago](https://www.amazon.com/dp/B0GT1TTM6G) [**Bluelab OnePen - a 3-in-1 Temperature EC/PPM and pH Meter Lightning Fast Readings - Bluetooth Data Sharing & in-App Tracking - Replaceable Probe**Bluelab**$244.71**79 rev1y ago](https://www.amazon.com/dp/B0DF71QDNJ) [**Bluelab PENSTP pH and Conductivity Starter Pack - Precision Nutrient Solution Management Kit with Temperature Measurement Waterproof Pens and Probe Care Kit**Bluelab**$189.66**1,208 rev2y ago](https://www.amazon.com/dp/B0CFZXMF53) [**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**$112.97**233 rev2y ago](https://www.amazon.com/dp/B0CCXMNGST) [**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**$352.72**51 rev2y ago](https://www.amazon.com/dp/B0CCQ3SHBW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$113.89**4.4★**▲ 280%**](https://www.amazon.com/dp/B0GT1TTM6G) [**Bluelab pH Pen - 0.1 pH Accurate Durable Double Junction Probe Waterproof & Floats Auto Temperature Compensation Easy Calibration - Made in NZ**Bluelab**$94.80**4.4★**— 10%**](https://www.amazon.com/dp/B005POOJHG) [**Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit Replaceable Probe 0.01 pH Accuracy Lcd display**Apera Instruments**$79.25**4.5★**— 0%**](https://www.amazon.com/dp/B01ENFOIQE) [**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**$112.97**4.3★**— 2%**](https://www.amazon.com/dp/B0CCXMNGST) [**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**$43.50**4.7★**— 2%**](https://www.amazon.com/dp/B01GQVSQGG)
**~~View all trending →~~**
## **What buyers say about bluelab ph pen**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Ease Of Use**23%
*“Easy to operate”*
**Quality-Overall**11%
*“The build quality is excellent”*
**Display-Overall**10%
*“very easy to read the display”*
**Water Resistance**8%
*“completely waterproof”*
**Value For Money**8%
*“Definitely worth the money”*
**Durability**6%
*“It's easy to us and durable”*
**Strength**4%
*“Solid and accurate”*
**Instructions/User Manual/Troubleshooting**3%
*“Clear instructions”*
**Efficiency**2%
*“Seems to work well and well engineered”*
**Design-Overall**2%
*“Seems to work well and well engineered”*
### **What buyers complain about **
**Value For Money**27%
*“ends up expensive”*
**Functionality-Overall**13%
*“it will not work”*
**Quality-Overall**12%
*“quality control let this pass”*
**Durability**11%
*“Dont last long”*
**Thickness**3%
*“know that glass is thin”*
**Ease Of Use**2%
*“It took some getting used to”*
**Measurement/Reading Accuracy**1%
*“This is when I notice the cheaper meters are very inaccurate”*
**Water Resistance**1%
*“The water is very cold here when it first comes out of the tap”*
**Assembly/Installation**1%
*“it took me an hour to set this meter up before I could get to my samples”*
**Instructions/User Manual/Troubleshooting**1%
*“Almost like its not written in the instructions”*
### **Top return reasons **
**Functionality-Overall**24%
**Measurement/Reading Accuracy**15%
**Product Condition**13%
**Value For Money**11%
**Advertised Vs Actual Product**7%
**Defective Material/Parts**5%
**Compatibility-Overall**5%
**Display-Overall**3%
**Connectivity-Overall**2%
**Durability**2%
## **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.
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