---
title: "Legionella Testing Kit — £59K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/business-industry-science/legionella-testing-kit"
last_updated: "2026-07-31T10:27:07.365Z"
locale: en
meta:
description: "Niche score 54/100 · £59K/yr market · 25K searches/yr · £34.78 avg price. A small market ($59K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £59K/yr market · 25K searches/yr · £34.78 avg price. A small market ($59K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Legionella Testing Kit — £59K/yr Amazon UK Niche (2026) - Flapen"
---
# **legionella testing kit**
**Worth a look**
Shows low returns (0.7%), but a small market ($59K/yr) keeps it on the watch list.
Market size 15Growth 23Conversion 74Competition 33Returns 96Price range 65Avg price 95Brand share 48Review moat 89Quality gap 90
**Returns**
**Incredible****0.7%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£34.78**
avg listing price — sweet spot $15–$100
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Great****215.65**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****6.8%**
search→purchase rate — share of searches ending in a sale
**Price range**
**Good****£5.04–£135.68**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****76%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****65%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-4.0%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****£59K**
£59K/yr · 25K searches
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=uk&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United Kingdom niche tracking, legionella testing kit is a £59K/yr Amazon United Kingdom market (25K searches/yr). The top 5 brands hold 76% of demand. Verdict: Worth a look — 54/100.
Data updated Jul 21, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **legionella testing kit market data**
- **Units sold / yr**
- **2K–2K**
- avg 100–250/product
- **Revenue / yr**
- **£52K–£70K**
- units × avg price
- **Conversion rate**
- **6.8%**
- **Avg BSR**
- **#71**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **76%**
- **Out of stock**
- **2.9%**
- **Avg brand age**
- **47 months**
- **Avg seller age**
- **199 days**
## **Competition & brand share**
The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▲rising
**Sellers**
**22**
**Top-5 brand share**
**76%**
Top 20: 100%
**Top-5 click share**
**65%**
Top 20: 100%
**Open market**
**18%**
- HydroHawk43% - CEM Instruments10% - Martindale9% - ETI8% - BOMATA7% - CookiBlend6% - Open — no brand owns it (8 brands, 18%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -4.0% search growth over the last 90 days.
600400Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.4×
[**Open Trend **](https://flapen.com/research/uk/business-industry-science/legionella-testing-kit/trend)
## **Top legionella testing kit 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%10%£6K20%£12K30%£18K40%£24K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 17 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**HydroHawk Legionella Swab Test for Water Outlets - Single-Use Legionella Testing Kit for Legionella pneumophila SG1. Water Testing Kits for Pools Air Con Units Hot Tubs Shower Heads Taps & Hoses**HydroHawk**£22.08**4.4★114 rev](https://www.amazon.co.uk/dp/B0DBM1GMMG) [2**CEM Instruments 3 in 1 Clamp Probe & Infrared Thermometer for Legionella Water Testing Plumbers Air Conditioning & HVAC Service Engineers**CEM Instruments**£49.80**3.9★135 rev](https://www.amazon.co.uk/dp/B07CJZGRRX) [3**Martindale THERMOKITLGN Legionella Testing Thermometry Kit Yellow**Martindale**£123.37**4.4★38 rev](https://www.amazon.co.uk/dp/B08LNYC5R9) [4**ETI ETI860-860 Legionnaires Thermometer Kit**ETI**£135.68**4.4★23 rev](https://www.amazon.co.uk/dp/B00Q1FCJ48) [5**BOMATA Waterproof IPX7 Thermometer for Water Liquid Candle and Cooking. Instant Read Food Thermometer with Long Probe for Cooking Meat BBQ! T101 Black**BOMATA**£6.80**4.5★2,379 rev](https://www.amazon.co.uk/dp/B0CP3WKL7Z)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Digital Thermometer Legionella Testing Kit 6802 II Dual Channel Thermocouples Temperature Meter Gauge with 2 K-Type Probes LCD Display**CookiBlend**£20.95**1 rev6mo ago](https://www.amazon.co.uk/dp/B0GGRL263S) [**HydroHawk Legionella Swab Test for Water Outlets - Pack of 3 Single-Use Legionella Testing Kit for Legionella pneumophila SG1. Water Testing Kits for Pools Hot Tubs Shower Heads Taps & Hoses**HydroHawk**£63.66**114 rev10mo ago](https://www.amazon.co.uk/dp/B0FRSX7H1B) [**TONIXY Thermometer Legionella Testing Kit Thermocouple 6802 II With 4 Probes For BGA HVAC Testing -50C To 1300C Range Large LCD Display**TONIXY**£15.93**4 rev10mo ago](https://www.amazon.co.uk/dp/B0FPBFS61T) [**HydroHawk 50 x 6-in-1 Pool Spa & Hot Tub Test Strips Water Testing Kit for Chlorine Bromine pH Alkalinity Cyanuric Acid & Hardness. Fast Accurate Easy-To-Use Testing Kit**HydroHawk**£8.47**20 rev1y ago](https://www.amazon.co.uk/dp/B0FHHTS81V) [**AQUANEXO 21 Parameters 125 + 20 Drinking Water Test Strips + 2 x Coliform Bacteria Test pH Test Strips Water Tester Drinking Water Water Hardness Measure Drinking Water Hardness Test Strips**AQUANEXO**£15.12**138 rev1y ago](https://www.amazon.co.uk/dp/B0F1D177SN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AQUANEXO 21 Parameters 125 + 20 Drinking Water Test Strips + 2 x Coliform Bacteria Test pH Test Strips Water Tester Drinking Water Water Hardness Measure Drinking Water Hardness Test Strips**AQUANEXO**£15.12**4.3★**▲ 269%**](https://www.amazon.co.uk/dp/B0F1D177SN) [**Digital Thermometer Legionella Testing Kit 6802 II Dual Channel Thermocouples Temperature Meter Gauge with 2 K-Type Probes LCD Display**CookiBlend**£20.95**5.0★**▲ 207%**](https://www.amazon.co.uk/dp/B0GGRL263S) [**HydroHawk Legionella Swab Test for Water Outlets - Pack of 3 Single-Use Legionella Testing Kit for Legionella pneumophila SG1. Water Testing Kits for Pools Hot Tubs Shower Heads Taps & Hoses**HydroHawk**£63.66**4.4★**▲ 114%**](https://www.amazon.co.uk/dp/B0FRSX7H1B) [**Water Testing Kits for Drinking Water 125 Strips 18 in 1 Home Water Test**HOVIRAN**£12.71**4.1★**▲ 88%**](https://www.amazon.co.uk/dp/B0D1QW36GJ) [**HydroHawk Legionella Logbook for Rental Properties 50 Test Record Sheets & Instructions Ideal for Landlords and Property Managers. for Use with HydroHawk Legionella Testing Kit**HydroHawk**£5.95**3.1★**▲ 52%**](https://www.amazon.co.uk/dp/B0F8R2FH1W)
**~~View all trending →~~**
## **What buyers say about legionella testing kit**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Value For Money**21%
*“Good value for money”*
**Quality-Overall**21%
*“This little piece of kit is absolutely ideal”*
**Advertised Vs Actual Product**21%
*“Works as it should”*
**Ease Of Use**12%
*“Easy to use”*
**Efficiency**6%
*“Works super well”*
**Water Resistance**4%
*“solid waterproof build”*
**Functionality-Overall**3%
*“Works fine happy with the product fudge came out perfectly”*
**Portability**3%
*“Great price easy to carry”*
**Strength**2%
*“Absolutely solid”*
**Ease Of Cleaning**1%
*“Clean, neat, easy to use and above all, accurate”*
### **What buyers complain about **
**Functionality-Overall**18%
*“Its already malfunctioning, when i turn it on it flickers back and forth between c and f and doesn't stop, doesn't give a reading at all”*
**Heating**18%
*“It doesn't work very well It shifts and flickers between farenehigh and celcius and then stops going up in temperature - very temperamental”*
**Value For Money**17%
*“Not worth the cost”*
**Durability**14%
*“Broken after 4 months”*
**Quality-Overall**9%
*“poor quality”*
**Water Resistance**5%
*“You cannot submerge it in water”*
**Compatibility-Overall**5%
*“Mine doesn't work over an induction hub”*
**Display-Overall**5%
*“When the hub is on, the display goes completely haywire, rapidly changing readings and switching between C and F”*
**Ease Of Use**3%
*“Even a strong farmer can't open it”*
### **Top return reasons **
**Functionality-Overall**41%
**Defective Material/Parts**12%
**Quality-Overall**5%
**Display-Overall**5%
**Heating**5%
**Durability**4%
**Certifications**4%
**Touch/Button Controls**3%
**Battery Life**3%
**Value For Money**2%
## **Common questions**
- **Is legionella testing kit profitable to sell on Amazon United Kingdom?**
- The niche generates £59K/yr across 17 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is -4.0%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the legionella testing kit niche?**
- 14 brands and 22 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 76% of demand.
- **What do buyers complain about in legionella testing kit?**
- Top complaints mined from reviews: Functionality-Overall, Heating, Value For Money. The return rate is 0.7%.
- **When does demand for legionella testing kit peak?**
- Demand is steady year-round — the busiest month runs 1.4× the quietest.
- **What does it cost to enter the legionella testing kit niche?**
- Listings span £5.04–£135.68; the average listing price is £34.78 (sweet spot $15–$100). The average incumbent carries 216 reviews — the moat a new listing must climb.
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