door sensor
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Price range
Great£9.92–£32.22cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Great£15.34avg listing price — sweet spot $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Conversion
Good4.6%search→purchase rate — share of searches ending in a sale
Returns
Good2.9%return rate — above 5% kills the launch gate
Review moat
Good1,416.55avg incumbent reviews — the moat a new listing must climb
Growth
Bad-15.7%90-day search growth — must beat 0% to launch
Competition
Bad79%top-5 click share — a locked-up shelf
Market size
Bad£66K£66K/yr · 94K searches
Brand share
Bad100%top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, door sensor is a £66K/yr Amazon United Kingdom market (94K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Jan–Feb–Oct–Nov–Dec. Verdict: Skip it — 35/100.
Data updated Jul 22, 2026 · scored weekly · How we score niches
door sensor market data
- Units sold / yr
- 4K–5K
- avg 250–500/product
- Revenue / yr
- £61K–£77K
- units × avg price
- Conversion rate
- 4.6%
- Avg BSR
- #11
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 45%
- Out of stock
- 10.0%
- Avg brand age
- 44 months
- Avg seller age
- 175 days
Competition & brand share
The top 5 products capture 79% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 falling
Sellers
36
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
79%
Top 20: 100%
Open market
0%
- Tapo66%
- Aqara23%
- SONOFF6%
- SanJie3%
- SENCKIT2%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -15.7% search growth over the last 90 days.Peak months: Jan, Feb, Oct, Nov, Dec · busiest ÷ quietest = 3.5×
Top door sensor search terms
- door sensor25K/yr
- tapo door sensor16K/yr
- tapo alarm8K/yr
- aqara door sensor8K/yr
- tapo alarm system7K/yr
- door sensor that alerts your phone5K/yr
- smart door sensor5K/yr
- tapo t1105K/yr
- door contact sensor3K/yr
- contact sensor4K/yr
Top door sensor 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
Tapo T110 Smart Door Alarm Window Door Alarm Sensor with Real-Time Monitoring Instant Notifications Smart Home Automation Battery Included Hub Required Works with Tapo Devices Alexa Google Home
Tapo£10.334.5★899 rev
Aqara Zigbee Door and Window Sensor Wireless Mini Contact Sensor for Alarm System and Smart Home Automation Compatible with Apple HomeKit Home Assistant Alexa Aqara Hub Required
Aqara£12.574.5★5,905 rev
SONOFF SNZB-04P Zigbee Door Window Sensor Send Alert to Your Smartphone for Home Security Compatible with Alexa/Google Home SONOFF Zigbee Bridge Required Batteries Included
SONOFF£10.064.4★620 rev
Aqara Zigbee Door and Window Sensor 3Pack Wireless Mini Contact Sensor for Alarm System and Smart Home Automation Compatible with Apple HomeKit Home Assistant Alexa Aqara Hub Required
Aqara£32.224.5★1,509 rev
Tapo H200 Smart Hub with Alarm & Chime Works with Switches Buttons Sensors Cameras and Video Doorbells Connect Up to 64+4 Devices 19 Ringtones Low-Power Wireless Local microSD Storage
Tapo£21.764.5★854 rev
Newest
by launch date
SANJIE Wireless Door Open Alarm Sensor Chime 600FT Operating Range 55 Ringtones 5 Volume Level with LED Indicator Door Alarm for Home Store Office Security When Opens 1 UK Plug-in Receiver 1 Sensor
SanJie£14.14193 rev
Tapo H200 Smart Hub with Alarm & Chime Works with Switches Buttons Sensors Cameras and Video Doorbells Connect Up to 64+4 Devices 19 Ringtones Low-Power Wireless Local microSD Storage
Tapo£21.76854 rev
SONOFF SNZB-04P Zigbee Door Window Sensor Send Alert to Your Smartphone for Home Security Compatible with Alexa/Google Home SONOFF Zigbee Bridge Required Batteries Included
SONOFF£10.06620 rev
Aqara Door and Window Sensor P2 Matter over Thread Requires Thread Border Router Contact Sensor with Remote Alarm and Local Automation Supports Apple Home Google Home Alexa and SmartThings
Aqara£21.021,050 rev
Tapo S200B Smart Button One-Click Alarm Lighting Control Customized Actions Smart Doorbell Magnetic Mounting Battery Included Easy Installation Multiple Locations Control Tapo Hub Required
Tapo£9.92747 rev
Trending
90-day click momentum
Tapo T100 Smart Motion Sensor Motion Detectors Wide Range Detection Instant Alerts Hands-Free Motion-Activated Lighting Energy Saving Hub Required Battery Included(Packaging may vary)
Tapo£12.374.5★
Tapo S200B Smart Button One-Click Alarm Lighting Control Customized Actions Smart Doorbell Magnetic Mounting Battery Included Easy Installation Multiple Locations Control Tapo Hub Required
Tapo£9.924.5★
Aqara Zigbee Door and Window Sensor 3Pack Wireless Mini Contact Sensor for Alarm System and Smart Home Automation Compatible with Apple HomeKit Home Assistant Alexa Aqara Hub Required
Aqara£32.224.5★
SONOFF SNZB-04P Zigbee Door Window Sensor Send Alert to Your Smartphone for Home Security Compatible with Alexa/Google Home SONOFF Zigbee Bridge Required Batteries Included
SONOFF£10.064.4★
SANJIE Wireless Door Open Alarm Sensor Chime 600FT Operating Range 55 Ringtones 5 Volume Level with LED Indicator Door Alarm for Home Store Office Security When Opens 1 UK Plug-in Receiver 1 Sensor
SanJie£14.144.3★
What buyers say about door sensor
What buyers praise and complain about, mined from review topics.What buyers love
“easy to install”
“Great quality and easy installation”
“The system connects”
“good price”
“it paired with my doorbell easily”
“Do the job”
“Easy to use”
“Perfect for keeping track of home security”
“Best compact product for ita price”
“Great Sensor”
What buyers complain about
“and they conflicted with each other, giving false readings and regularly disconnecting”
“its small”
“Too expensive”
“It's very strange that it doesn't support the latest version of the Tapo D130”
“I had trouble setting it up on my iPhone”
“and plugged it in it is so low in sound”
“When it's intended to alert for a break-in or door left open alarm then it's totally worthless when it only works randomly and intermittently”
“Not reliable and therefore no good”
“Bulky and would have been better as flat device with 3 buttons”
“Also found the app didn't work very well on double click”
Top return reasons
Common questions
- Is door sensor profitable to sell on Amazon United Kingdom?
- The niche generates £66K/yr across 11 tracked products. 90-day search growth is -15.7%. Flapen's verdict: Skip it (35/100).
- How competitive is the door sensor niche?
- 5 brands and 36 sellers compete. The top 5 products take 79% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in door sensor?
- Top complaints mined from reviews: Connectivity-Overall, Size-Overall, Value For Money. The return rate is 2.9%.
- When does demand for door sensor peak?
- Demand peaks in Jan–Feb–Oct–Nov–Dec; the busiest month runs 3.5× the quietest.
- What does it cost to enter the door sensor niche?
- Listings span £9.92–£32.22; the average listing price is £15.34 (sweet spot $15–$100). The average incumbent carries 1,417 reviews — the moat a new listing must climb.