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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[Large Floating Pool Thermometer] eLander Pro Water Thermometers

[Large Floating Pool Thermometer] eLander Pro Water Thermometers

Product ID: 525230455

Details

Age Range (Description)
Adult
Brand
eLander
Colour
White
Included Components
Floating Pool
Special Feature
Large Display

📏Large 7.3-inch display

🌡️Accurate temp readings ±1°F

🛡️Shatter-resistant durable glass

€ 30.55

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌊 Dive into perfect pool temps with precision and style!

BOLD CLEAR DISPLAY - Oversized analog dial ensures effortless reading from across the pool—no squinting required.
UNIVERSAL COMPATIBILITY - Designed for all pools, spas, hot tubs, aquariums, and fish ponds—your all-in-one water temp solution.
EFFORTLESS USE STORAGE - Comes with a long string for easy retrieval and compact storage—poolside convenience at its best.
INSTANT POOLSIDE PRECISION - Quick, reliable temperature readings in both Fahrenheit and Celsius to keep your swim perfect.
BUILT TO LAST SWIM AFTER SWIM - Premium shatter-resistant glass withstands outdoor elements and accidental drops.

The eLander Pro Large Floating Pool Thermometer delivers fast, accurate water temperature readings up to 120°F (50°C) with a large, easy-to-read analog display. Crafted from durable, shatter-resistant glass, it’s designed for all outdoor and indoor pools, spas, hot tubs, aquariums, and fish ponds. Featuring a quick 500ms response time and dual Fahrenheit/Celsius scales, it ensures you maintain the ideal swim environment effortlessly.

Specifications

ASIN	B01GHM6XEQ
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#242,762 in Garden & Outdoors ( See Top 100 in Garden & Outdoors ) #119 in Indoor-Outdoor Thermometers
Brand	eLander
Brand Name	eLander
Colour	White
Display Type	Analog
Global Trade Identification Number	00701979997550
Immersion Depth	1.2E+2 Centimetres
Included Components	Floating Pool Thermometer
Indoor Outdoor Usage	Outdoor
Item Length	7.3 Inches
Manufacturer	eLander
Model Name	A15-EL
Model Number	A15-EL
Outer Material	Glass
Outer Material Type	Glass
Part Number	A15-EL
Power Source Type	Battery Powered
Product Care Instructions	Hand Wash Only
Resolution	1 degree fahrenheit
Response Time	500 Milliseconds
Reusability	Reusable
Special Feature	Large Display
Special Features	Large Display
Specification Met	CE
Style Name	Poolside
UPC	701979997550
Unit Count	1.0 Count
Upper Temperature Rating	120 Degrees Fahrenheit

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Fantastic experience overall. Will recommend to friends and family.

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