Where the power comes from is the whole question
A touchless tap is a small electrical appliance sitting on a water supply, and the specification that decides everything is where its power comes from. Battery models — usually four AA cells or a 6 V lithium pack — install like an ordinary tap and need the cells changed; mains models need a socket under the basin, which most bathrooms do not have. Makers state a battery life in cycles or months, and that figure assumes a usage pattern you should read rather than trust. Then come the behaviours: sensing range, which decides whether the tap runs every time someone reaches for the soap, and run-on time, the seconds it keeps flowing after you move away. Many have no mixing at all — one temperature, set at the valves below. We compare power source and stated battery life, sensing range, run-on time, whether temperature is adjustable, and tap hole diameter.
Sensor tap · 4 × AA batteries — stated · 10–20 cm sensing range — stated · solid brass · temperature button
The only sensor tap in this catalogue that publishes its sensing range, and one of the two that state how it is powered — 10 to 20 cm, on four AA cells.
Best for: A basin where touchless operation is wanted, temperature control is needed and no socket exists.
≈ £79 / 79 €
Sensor tap · internal battery — stated · single supply, hot OR cold — stated · brass · 3/8 in connection
A battery sensor tap that states plainly what most of this shelf leaves you to discover: one hose, one supply, no mixing at all.
Best for: A cloakroom or a guest basin used for washing hands briefly, where mixing was never part of the plan.
≈ 82 €
Sensor tap · 4 × AA required, not supplied — stated · adjustable temperature — stated · solenoid valve · chrome
An electronic basin tap with mini buttons for temperature and a solenoid valve, powered by four AA cells the maker states are not included.
Best for: A basin where touchless operation and a chosen temperature are both wanted, and no socket exists.
≈ 85 €
Sensor tap · 6 V lithium CR-P2 — stated · run time 10, 20 or 30 s — stated · single supply · ComfortZone 100 mm
The only sensor tap here that publishes its run-on time — selectable at 10, 20 or 30 seconds — alongside its battery type and its working height.
Best for: A basin fed by a central thermostatic supply, or a cloakroom where cold water is enough, and where the run-on time is worth setting.
≈ 148 €
Sensor tap · adjustable temperature limiter — stated · quick-fit system · chrome · successor model noted by the maker
A touchless tap with an adjustable temperature limiter — the specification that decides whether a sensor tap suits a bathroom rather than only a cloakroom — from a range the maker states has a successor.
Best for: A bathroom basin where touchless operation is wanted and cold-only would not be acceptable.
≈ £165 / 159 €
