Can this used to test bath water?

Since it will register up to 120 degrees and is advertised for hot tubs, spas and pools, I’m guessing that it would be right for the job. I use it in my heated swimming pool and it works great!

how long does it take to get an accurate reading

As long as it takes to pull the thermometer out of the water and read it.

Can the top be taken off so it sinks? I'd like to tie it to the ladder and get the temp reading deeper.

Yes. The top provides buoyancy and press-fits onto the thermometer. Separating them and the thermometer sinks like rock. To add a line you will need an eye fastened to the thermometer, or as you indicate "tie it to the ladder". No problem.

Every one I've purchased lasts only a few months. The thermometer comes loose from the backing making it useless. Anyone have this experience?

I have not had an issue with mine. I have had it for 5 months. It is in my koi pond. Not sure if a chlorinated pool would cause this.

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eLander [Large Floating Pool Thermometer] Pro Water Thermometers, for Outdoor & Indoor Swimming Pools, Spas, Hot Tubs, Fish Ponds

eLander [Large Floating Pool Thermometer] Pro Water Thermometers, for Outdoor & Indoor Swimming Pools, Spas, Hot Tubs, Fish Ponds

Product ID: 345947947

Details

Brand
eLander
Special features
High Accuracy
Colour
White
Age range (description)
Adult
Included components
Floating Pool

📏Large 7.3-inch display

🌡️Accurate temp readings ±0.5°F

🛡️Shatter-resistant durable build

¥5389

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Description

🌊 Stay cool, stay precise — the pool thermometer that means business!

BUILT TO LAST - Crafted from premium shatter-resistant materials designed to withstand outdoor elements and accidental drops.
BOLD CLEAR DISPLAY - Oversized digital screen ensures you never squint to check the water temp, day or night.
EFFORTLESS MONITORING - Comes with a long string for easy retrieval and quick storage, making pool care hassle-free.
PRECISION AT A GLANCE - Instant, high-accuracy temperature readings in both Fahrenheit and Celsius to keep your pool perfect.
VERSATILE USE ANYWHERE - Ideal for pools, spas, hot tubs, fish ponds, and aquariums—your all-in-one water temp solution.

The eLander Pro Floating Pool Thermometer delivers fast, accurate water temperature readings up to 120°F (50°C) with a large, easy-to-read digital display. Built from durable, shatter-resistant materials, it’s designed for both indoor and outdoor use across pools, spas, hot tubs, and fish ponds. Battery-powered with a quick 500ms response time and a convenient long string for easy handling, it’s the essential tool for maintaining your perfect swim environment.

Specifications

ASIN	B01GHM6XEQ
Additional Features	High Accuracy
Age Range Description	Adult
Age range (description)	Adult
Brand	eLander
Brand Name	eLander
Color	White
Colour	White
Display Type	digital
Global Trade Identification Number	00701979997550
Immersion Depth	1.2E+2 Centimeters
Included Components	Floating Pool Thermometer
Included components	Floating Pool Thermometer
Indoor Outdoor Usage	Outdoor
Item Length	7.3 Inches
Manufacturer	eLander
Model	A15-EL
Model Name	A15-EL
Outer Material	Polyethylene or Polypropylene or Plastic
Outer material	Polyethylene or Polypropylene or Plastic
Part Number	A15-EL
Power Source	Battery Powered
Product Care Instructions	Hand Wash Only
Response Time	500 Milliseconds
Reusability	Reusable
Special features	High Accuracy
Specification Met	CE
Style Name	Poolside
UPC	701979997550
Unit Count	1.0 Count
Upper Temperature Range	120 Degrees Fahrenheit

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¥5389

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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