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Best flush PIR sensor for one dry-room job

Updated: 23 October 2026

A search for the best flush PIR sensor often lands on a trade detector at roughly £27 to £33 including VAT, That is a different product from the nine amazon.co.uk rows here, about £9.99 to about £21.99. Best means best for one stated dry-room job. Stars are amazon.co.uk counts, not a lab rank. The full table is on the [Flush PIR sensor](/hub/electronic-surveillance/flush-pir-sensor) page. Peter F., DIY and tools editor, updated this on 20 October 2026 from those listings. There was no lab test. A qualifying purchase can earn a commission at no extra cost to you.

A search for the best flush PIR sensor often lands on a trade detector at roughly £27 to £33 including VAT, That is a different product from the nine amazon.co.uk rows here, about £9.99 to about £21.99.

Our top picks

SEBSON SEBSON IR_ES_A flush

Best overall

SEBSON SEBSON IR_ES_A flush
9.4/10about £13.99
View offer
Sensky Sensky BS041 recessed

Best value

Sensky Sensky BS041 recessed
9.0/10about £12.99
View offer
SEBSON SEBSON IR_ES_B swivelling

Alternative

SEBSON SEBSON IR_ES_B swivelling
8.8/10about £17.99
View offer
On this page
  1. 1.What best can mean here
  2. 2.Hallway and a stated hole
  3. 3.Doorway and a small head
  4. 4.Rows to leave for a dry ceiling

What best can mean here

The largest review sample is SEBSON IR_ES_A, at 4.5 from 1,819 reviews and about £13.99. IR_BS_A is 4.5 from 1,505 at the same price. IR_ES_E is 4.4 from 206, Sensky is 4.3 from 45, IR_ES_FA is 3.7 from 19, and the Zquqwa is 4.3 from 6. A high count is an amazon.co.uk sample. It does not fill in the hole or the timer cap. A Timeguard or CP Electronics unit is context, not an eleventh row. Why a blank cut-out stays blank is on the flush PIR sensor buying guide.

Hallway and a stated hole

For a dry hallway, when you already know the hole, IR_ES_A (B0789BYSK1) has the most reviews: flush, 6 m, 360 degrees, 600 W LED, IP20, and 10 seconds to 15 minutes. The cut-out is not stated. Skip it if you need that hole printed, a swivel, or an earth terminal. Reviews mention doorway triggers and tape on the lens. For a stated 63–66 mm hole, IR_ES_E (B0DMT4GMBN) is about £14.99, 4.4 from 206: Ø63–66 mm, 8 m, 1,000 W LED, and 10 seconds to 30 minutes. IP is not in the saved table. Skip it if you need a sensitivity pot. Reviews say detection often waits until you are underneath, and one UK review reported a failure inside 12 months.
SEBSON SEBSON IR_ES_A flush

Testsieger

SEBSON SEBSON IR_ES_A flush
9.4/10about £13.99
View offer

Doorway and a small head

For a doorway you can aim away from, IR_ES_B (B0789XFS9F) is the swivel, about £17.99, 4.2 from 1,394: silver, IP20, 3–8 m, 600 W LED. The cut-out is not stated. One review reported a bit over 100 V AC across open relay contacts. For a small head, IR_BS_A (B07H2CXKDD) is about £13.99, 4.5 from 1,505. Time stops at 8 minutes in steps, lux is only 10 or 2,000, and the listing prints both 360 and 120 degrees. Skip it for a 15-minute WC delay. This comparison keeps a 400 W energy-saving load and leaves the cut-out unstated.

Rows to leave for a dry ceiling

Sensky BS041 (B0G9391L3S) is about £12.99, 4.3 from 45, with a 65–70 mm opening and a dry-indoor line that excludes bathrooms. Skip it when the lamp load has to be a number: wattage and range in metres are not printed. IR_ES_C is about £14.99, 4.2 from 376, with the cut-out unstated. Skip it if you wanted a standard 63 mm sensor. IR_ES_FA (B0G4N5G6VK) is about £21.99, 3.7 from 19, IP54, 2 to 6 m, and 1,000 W LED. Skip it if the timer must follow the dial: two UK reviews say it did not. The Zquqwa (B0FNR3P4N5) is about £9.99, 4.3 from six reviews, and one text says it tripped a consumer unit. That is not best value. Bathroom zones stay on PIR sensor bathroom zones.

Common questions

Which flush PIR in this set has the most amazon.co.uk reviews?
IR_ES_A, B0789BYSK1, at 4.5 from 1,819 reviews and about £13.99. IR_BS_A is next at 1,505 reviews for the same shelf price. The count is an amazon.co.uk sample, not a lab score, and it does not fill in the missing cut-out on either listing.
Which listing actually prints the hole size?
IR_ES_E prints Ø63–66 mm. Sensky BS041 prints 65–70 mm. The other kept rows leave the cut-out unstated. A reviewer’s guess, including about 70 mm on the swivel, is not the listing hole. Trade detectors at 63–64 mm are a different product.
Which one can I aim away from a doorway?
IR_ES_B, the silver swivelling head at about £17.99. IR_ES_A reviews include doorway triggers and tape on the lens, which is a workaround rather than an aim control. IR_ES_E reviews say detection often waits until you are underneath, and a review says it has no sensitivity pot.
Which one is the small head, and what timer limit comes with it?
IR_BS_A. The saved head is Ø18 x 25 mm, with the switch body behind it. Time stops at 8 minutes in steps, and lux is only 10 or 2,000. That is enough for a short dry-room pass and too short if you wanted 15 minutes in a WC. The listing also prints both 360 degrees and 120 degrees.
Is the £9.99 sensor the best value?
Not on this sample. The Zquqwa has 4.3 from six reviews, a 300 W LED cap, no stated cut-out, and one review that says it tripped a consumer unit. A lower price with a printed 65–70 mm hole is the Sensky at about £12.99, and that listing still omits the wattage. Best value needs that limit in the same sentence.
Is the IP54 model the one to buy for outside?
Only if you accept the limits. IR_ES_FA is the only row that claims IP54 and an outdoor use, at about £21.99 and 3.7 from 19 reviews. Two UK reviews say the timer did not follow the setting. The cut-out is unstated, and the claim is not a bathroom-zone approval.
Why do trade sites show a different best flush PIR?
Because that query often returns a Timeguard, CP Electronics, or Danlers unit with a stated 50 Hz supply and a 63 mm class of hole, at a higher price than this amazon set. Those pages do not rank these nine rows. Use them as a reminder that best without a job is a different shop, not as an extra product in this table.

Related pages

Flush or surface mount PIR sensor

How to install a flush PIR sensor

Flush PIR sensor

PIR sensor bathroom zones and a flush ceiling switch

A flush PIR sensor: the figures that decide the fit

Sources

Public UK sources from the research digest. Shelf prices, stars and review counts are the figures stored with these nine amazon.co.uk listings. No laboratory test was carried out. October 2026.

  1. Approved Document P, 2013 (retrieved 22 October 2026)
  2. GOV.UK: building work, replacements and repairs (retrieved 22 October 2026)
  3. GOV.UK: Electrical Equipment (Safety) Regulations 2016 (retrieved 22 October 2026)
  4. SELECT bathroom zones guide, 2022 (retrieved 22 October 2026)
  5. IET: section 701, locations containing a bath or shower (retrieved 22 October 2026)
  6. Danlers CEFL PIR user guide (retrieved 22 October 2026)
  7. Autenco flush PIR data sheet (retrieved 22 October 2026)
  8. Lighting Industry Association: inrush currents (retrieved 22 October 2026)