Solar or wireless pool thermometer
Updated: October 2026
You can already see the pool from the patio, or you cannot, and that is the whole solar or wireless pool thermometer decision. A solar float puts the number on the water, where you look when you are outside. A wireless set puts a receiver indoors, so you can check a covered tub without walking out in a dressing gown. The extra box is also an extra way to fail: another battery, and a link that UK reviews often say dies inside a season. Prices for every row stay on the [pool thermometer comparison](/hub/swimming-pools/pool-thermometer). This page does not reopen analogue floats or scoops, and it does not set the hot-tub maximum. Shelf figures are from this set, and Amazon links from the main table are affiliate links.
You can already see the pool from the patio, or you cannot, and that is the whole solar or wireless pool thermometer decision. A solar float puts the number on the water, where you look when you are outside.
You can already see the pool from the patio, or you cannot, and that is the whole solar or wireless pool thermometer decision. A solar float puts the number on the water, where you look when you are outside. A wireless set puts a receiver indoors, so you can check a covered tub without walking out in a dressing gown. The extra box is also an extra way to fail: another battery, and a link that UK reviews often say dies inside a season. Prices for every row stay on the pool thermometer comparison. This page does not reopen analogue floats or scoops, and it does not set the hot-tub maximum. Shelf figures are from this set, and Amazon links from the main table are affiliate links.
Our top picks
| Badge | Product | Where you read it | Power | Stated range | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Baldr Baldr solar float | LCD on the water, no receiver | Solar plus a cell | Review cites −20°C to 50°C | 8.6 | about £19.99 | View offer |
 PoolPrime PoolPrime dual screen | Two faces on the water | Solar, 1 AAA, USB-C | −9°C to 80°C on both lines | 8.0 | about £25.99 | View offer | |
 Inkbird Inkbird IBS-P01R | Indoor monitor | 4 AAA | Sensor −40°C to 70°C | 7.2 | about £29.59 | View offer |
On this page
Solar, if you will look at the pool
Choose a solar float when you will stand where you can see the screen. In this set the plain Baldr is the large-review example: £19.99, 4.2 from 1,937 reviews, an LCD to a tenth of a degree, a nylon tether in the box, and IPX8 printed with no depth and no time. The first 50 stored reviews are from the United Kingdom. People found it easy to read in a pool, a pond or an ice bath. Several also say the unit stopped after a few months or under a year. You are buying a deck display with a known life complaint, not a permanent instrument. There is no receiver. A bullet that uses the word wireless does not change the contents of the box.
The dual-screen solar floats are the same job with two faces and a charge cable. The Baldr dual screen is £25.99, 4.2 from 654 reviews, IPX7 up to 1 metre, with 1 AA and a USB-C cable included. Its bullet says −9°C to 80°C, and the technical upper rating says 50°C. Keep both. The PoolPrime dual screen is the same £25.99, 4.1 from 613 reviews, also IPX7 to 1 metre, with 1 AAA and a USB-C cable, and both the bullet and the technical line print up to 80°C. A UK review said its nylon cord perished in six to eight weeks of strong sun. Another note in that file is drift after five months and a blank display. Solar on these pages means a panel plus a cell you can top up, not a battery-free object.
Shade, covers and the cheap rows
A panel under a winter cover, or against a fence through a grey week, can go blank because the cell is flat. That is a charge problem, not proof the pool has no temperature. Give it daylight before you call it dead. The cheap solar rows are not the answer to that problem. The WEQNGIU is £9.49 with two reviews, one of which says water passed the seal in two days. The Mupkvy is £9.99 with three reviews, one of which reports rust after seven days and a float that would not stay upright. A large screen and a cord, on a listing with hundreds of reviews, is the solar side of this choice. Two reviews are a gamble.
Wireless, if the reading has to be indoors
Choose wireless when the point is not walking outside. Four sets in this comparison list a receiver or a monitor. They do not share one distance. The Inkbird IBS-P05R prints 300 metres or 980 feet, IP68, −40°C to 70°C, a receiver and a light, at £59.49 with 4.0 from 115 reviews. The Inkbird IBS-P01R prints 90 metres, a sensor from −40°C to 70°C, a monitor from −10°C to 60°C at ±1.0°C, and up to three sensors claimed, at £29.59 with 3.8 from 250 reviews and 4 AAA batteries required. The Aottom prints 50 metres or 164 feet and IP68 at £17.99, with 3.4 from 189 reviews. The Longzhuo prints both 100 metres and 60 metres, plus 433 MHz, at £21.99 with 3.1 from 44 reviews.
Those metres are open-page claims. They are not a test through your walls. One IBS-P01R review said the link worked through a thick stone wall. That is one garden. Do not stretch it to the 300 metre bullet on the light-up Inkbird, and do not treat Aottom’s “Wi Fi, Wireless” line as a home-network setup. The bullets do not say you join the house Wi-Fi. You get a receiver that listens for the float.
UK reviews on these rows describe the failure you are adding. On the IBS-P05R, reviewers liked an indoor check, then reported a link dead within 12 months, lights that would not run, and a battery that stayed low in weak sun. On the IBS-P01R, reviews describe failed transmitters and battery life that collapsed from about a week to under a day. On the Aottom, many UK reviews say it failed after about a month to four months, and the technical block does not even number the batteries. On the Longzhuo, stored UK reviews describe water past a rubber seal and a lost link within weeks or a few months. A receiver is not a free upgrade on a solar float.
The condition
If you can see the water, buy a solar float with a large screen and a cord, and accept that UK reviews include units which stop inside a year. In this set that is the plain Baldr when you want the biggest review file, or the PoolPrime when you want the 80°C line to match on both parts of the listing. Skip the Baldr dual screen if the clash between 80°C on the bullet and 50°C on the technical block bothers you. Skip the £9 solar listings with two or three reviews. You do not need the £59.49 light to know the temperature. The light is an extra, and the reviews say it does not always work.
If the reading has to be indoors, buy a set that lists a receiver, and buy it knowing the link is the part reviews say dies. Start with the IBS-P01R if you want the larger of the Inkbird review files and you will live with 4 AAA cells. Start with the Aottom only if £17.99 is the budget and a short life in the reviews is acceptable. Do not start with the Longzhuo if you wanted an IP code and a review count in the hundreds. The IBS-P05R is the one to add when you also want the light and you will pay the top price in the set.
Either way, place the float as the how to use a pool thermometer page describes, tethered and out of the skimmer. If you have not yet decided that digital is the job, the pool thermometer buying guide still comes first. A hot tub under a cover is a fair reason to want the indoor screen. The main table is where you check the penny price before you order.
Common questions
When is a solar float enough?
When you will look at the pool. A solar LCD, tethered, with a review count in the hundreds, answers a deck reading. The plain Baldr at £19.99 is that row in this set, with the caveat that UK reviews include units which stopped within months. A solar float is not enough when the cover stays on and you want the number in the kitchen. It is also not enough if the only solar listing you can afford has two reviews.
When do I need the indoor monitor?
When you will not walk outside to look, or the tub is covered and the float’s own screen is hidden. The box has to list a receiver. You then accept another set of batteries and a radio link. In the UK reviews stored for these ASINs, that link is a common thing to lose within months. Need is not the same as a longer range printed on the bullet.
Will solar work in a cloudy British week or under a cover?
Daylight charges the cell. A cover or a dull stretch can leave the screen blank because the cell is flat, which is a different fault from a leak. These dual-screen boxes include a USB-C cable for that reason. Put the panel in light, or charge it, before you replace the float. Do not expect a solar unit stored all winter under an opaque cover to wake up with a full cell on the first morning.
Why do the distances say 50 m, 90 m and 300 m?
Because each listing prints its own figure. Aottom says 50 metres, IBS-P01R says 90 metres, IBS-P05R says 300 metres, and Longzhuo prints both 100 metres and 60 metres. None of those lines says the distance is through brick. One review mentioned a stone wall on the 90 metre model. That single garden does not verify the 300 metre claim indoors.
Does wireless mean Wi-Fi?
Not on these bullets. Aottom’s technical line says Wi Fi, Wireless, and the bullets still describe a float and a monitor, not joining your home network. Inkbird’s technical lines mention Bluetooth while the bullets talk about metres of range. Longzhuo prints 433 MHz. Read the included receiver as a paired screen. Do not plan to open a phone app unless that listing actually describes one.
Is the £59 light-up Inkbird the one to start with?
Only if you want the light and you will pay the highest price here for a receiver. It is 4.0 from 115 reviews, with UK reports of a dead link, lights that would not run, and weak sun charging. A temperature does not require the lamp. If you only wanted the cheapest digital float, that is a solar listing with a real review base, not this Inkbird, and not a two-review solar disc at £9.49.
Related pages
Sources
Public UK sources for managed-pool temperature context, the hot-tub ceiling, cold-water shock, and mercury controls. Listings are the amazon.co.uk captures for these eleven ASINs, not a live reload on 17 October 2026. Prices on amazon.co.uk move.
- HSE, swimming pool safety (retrieved 17 October 2026)
- Hastings FOI on pool temperature (retrieved 17 October 2026)
- Wokingham FOI, swimming pool temperature (retrieved 17 October 2026)
- PWTAG, temperature cuts (retrieved 17 October 2026)
- GOV.UK, controls on mercury (retrieved 17 October 2026)
- GOV.UK, General Product Safety Regulations 2005 (retrieved 17 October 2026)
- RNLI, cold water shock (retrieved 17 October 2026)
- BISHTA, hot tub temperature and HSG 282 (retrieved 17 October 2026)