How can it claim to measure water temp inside an aquarium without touching the water? Seems utterly useless.

The back of these thermometers is black so it absorbs the infra red radiation from the water through the glass into the sensor of the thermometer. I have got one of these thermometers but I don't find them very accurate. Particularly the air temperature reading part. This reading is greatly influenced by the warm water in the aquarium. I prefer the cheaper thermometers that go in the water.

Should it go more to the top or bottom of the glass please? Thanks x

I doesn't matter were it goes but I won't get it as when I had one it didn't hold its temperature after couple of weeks

How does it work does some part go into the tank

It sticks on to the side of the tank. There is a sensore on it and it is fairly accurate,I have one on each of my tanks.

Does this thermometer have a alarm to alert when the temperature goes above a certain temperature or below a certain temperature? any ideas which do?

This unit does not have an alarm alert - Hagen does not have a model with an alarm I am afraid.Kind regards. Anguel Iordanov

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🌡️ Stay ahead of pet health with precision and ease!

HYGIENIC AND DURABLE - Easy wipe-clean plastic surface with insulated protection for long-lasting use.
BUILT FOR LARGE BREEDS - Specifically designed to deliver accurate readings for adult large pets.
NO BATTERIES NO HASSLE - Ready to use anytime without worrying about power interruptions.
TRUSTED SAFETY STANDARD - FDA-approved to ensure reliable and safe temperature monitoring.
PRECISION MEETS PORTABILITY - Slim, lightweight form factor fits perfectly in your hand or kit.

The FL wireless 2-in-1 Digital Thermometer is a compact, lightweight, and FDA-approved device designed specifically for adult large breed pets. Featuring an insulated plastic body for durability and hygiene, it requires no batteries, ensuring hassle-free, on-demand temperature monitoring.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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AR$52735

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Product Dimensions	1.27 x 6.6 x 12.45 cm; 36.29 g
Item model number	11193
Breed Recommendation	Large Breeds
Pet Life Stage	Adult
Outer Material	Plastic
Colour	black
Number of Items	1
Quantity	1
Care Instructions	Wipe Clean
Special features	Insulated
Batteries required	No
Batteries Included	No
Specification Met	FDA
Item Weight	36.3 g

FL wireless 2-in-1 Digital Thermometer

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