legionella testing kit
Worth a lookShows low returns (0.7%), but a small market ($59K/yr) keeps it on the watch list.
Returns
Incredible0.7%return rate — above 5% kills the launch gate
Avg price
Incredible£34.78avg listing price — sweet spot $15–$100
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Review moat
Great215.65avg incumbent reviews — the moat a new listing must climb
Conversion
Good6.8%search→purchase rate — share of searches ending in a sale
Price range
Good£5.04–£135.68cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Okay76%top-5 brand share — brands hold most of the demand
Competition
Okay65%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
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
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.No pronounced peak months · busiest ÷ quietest = 1.4×
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.
All 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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£22.084.4★114 rev
CEM Instruments 3 in 1 Clamp Probe & Infrared Thermometer for Legionella Water Testing Plumbers Air Conditioning & HVAC Service Engineers
CEM Instruments£49.803.9★135 rev
Martindale THERMOKITLGN Legionella Testing Thermometry Kit Yellow
Martindale£123.374.4★38 rev
ETI ETI860-860 Legionnaires Thermometer Kit
ETI£135.684.4★23 rev
BOMATA Waterproof IPX7 Thermometer for Water Liquid Candle and Cooking. Instant Read Food Thermometer with Long Probe for Cooking Meat BBQ! T101 Black
BOMATA£6.804.5★2,379 rev
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£20.951 rev
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£63.66114 rev
TONIXY Thermometer Legionella Testing Kit Thermocouple 6802 II With 4 Probes For BGA HVAC Testing -50C To 1300C Range Large LCD Display
TONIXY£15.934 rev
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£8.4720 rev
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£15.12138 rev
Trending
90-day click momentumAQUANEXO 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£15.124.3★
Digital Thermometer Legionella Testing Kit 6802 II Dual Channel Thermocouples Temperature Meter Gauge with 2 K-Type Probes LCD Display
CookiBlend£20.955.0★
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£63.664.4★
Water Testing Kits for Drinking Water 125 Strips 18 in 1 Home Water Test
HOVIRAN£12.714.1★
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£5.953.1★
What buyers say about legionella testing kit
What buyers praise and complain about, mined from review topics.What buyers love
“Good value for money”
“This little piece of kit is absolutely ideal”
“Works as it should”
“Easy to use”
“Works super well”
“solid waterproof build”
“Works fine happy with the product fudge came out perfectly”
“Great price easy to carry”
“Absolutely solid”
“Clean, neat, easy to use and above all, accurate”
What buyers complain about
“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”
“It doesn't work very well It shifts and flickers between farenehigh and celcius and then stops going up in temperature - very temperamental”
“Not worth the cost”
“Broken after 4 months”
“poor quality”
“You cannot submerge it in water”
“Mine doesn't work over an induction hub”
“When the hub is on, the display goes completely haywire, rapidly changing readings and switching between C and F”
“Even a strong farmer can't open it”
Top return reasons
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.