Can the entire sensor unit be submerged in the pool? Not just the cable part?

No, just the cable. We have plans to make a floating sensor for pools, but until then, you need to put the sensor where it will not be submerged. This is not a fully company-encouraged solution but some customers put these in a tupperware style sealed container, drill a hole for the probe, caulk that up, and leave it to float in the pool or hot tub. It's a little DIY and not the best solution but I wanted to share that with you in case that might be an option for you. Enjoy! Eric with YoSmart

Can this be used to measure temp inside a chest freezer? Will signal get out of the chest freezer?

I have this YoLink model inside my chest freezer and refrigerator: Smart Wireless Temperature / Humidity Sensor Wide Range (-22 to 158 degrees) for Freezer Fridge Monitoring Pet Cage/Tank Monitoring Smartphone Alerts, Works with Alexa IFTTT, 2 Pack - Hub Included The model you’re asking about, I have one outside and one in my garage. The model in my freezer and refrigerator works great. If you already have a hub, I don’t see why the model you’re asking about wouldn’t work inside a freezer.

How to replace the two AAA batteries?

Remove 4 small rubber "pads" at the corners. Remove 4 small Phillips screws. Remove cover. Replace batteries. Reinstall.

Can I put this inside a water reservoir to detect when the water reaches a certain height?

We actually have a Water Level Monitoring Sensor that would be much better for your application. It comes with a water-sensitive probe, and the sensor can also work with standard float switches. It's not available now, but before too long we'll also offer a float switch as an accessory. Check it out! https://www.amazon.com/dp/B0BJPWL9L1?ref=myi_title_dp

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YoLink Temperature Sensor with Probe, YS8004

YoLink Temperature Sensor with Probe, YS8004

Product ID: 344896727

Details

Age Range (Description)
Adult
Brand
YoLink
Color
White
Connectivity Technology
LoRa
Display Type
Digital
Included Components
1 YoLink 1

💧Waterproof for fluid & surface use

📶1/4 mile LoRa wireless range

🌡️Extreme temp range -40°F to 221°F

€ 75.62

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Sold byAmazon BelgiumDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌍 Stay ahead of the curve with YoLink’s ultra-reliable, long-range temp sensor!

PLUG PLAY SIMPLICITY - Lightning-fast QR code setup via app—add devices in minutes, no tech headaches.
VERSATILE MONITORING MASTER - Track temps from pools to pipes, fridges to livestock water with one sensor.
INSTANT ALERTS ZERO DOWNTIME - Get real-time SMS, push, email, or siren notifications for off-normal temps.
SMART BATTERY LIFE DATA BACKUP - Choose 2- or 5-year battery options; stores data offline and syncs when reconnected.
UNMATCHED LONG RANGE CONNECTIVITY - LoRa tech delivers reliable data up to 1/4 mile—no WiFi needed, no dead zones.

The YoLink Weatherproof Temperature Sensor with Probe offers extreme high/low temperature monitoring (-40°F to 221°F) across diverse applications including water, air, and surfaces. Utilizing LoRa wireless technology, it provides a robust 1/4 mile range without WiFi, ensuring reliable connectivity even in challenging environments like freezers or underground. The sensor supports fast, hassle-free setup via QR code scanning and delivers instant notifications through multiple channels. With waterproof design, replaceable batteries (2- or 5-year options), and internal data storage for offline periods, it’s engineered for professional-grade remote temperature management.

Specifications

ASIN	B08Z3XH313
Additional Features	Waterproof
Age Range (Description)	Adult
Age Range Description	Adult
Best Sellers Rank	#27,114 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Temperature Probes & Sensors
Brand	YoLink
Brand Name	YoLink
Color	White
Connectivity Technology	LoRa
Customer Reviews	4.4 out of 5 stars 871 Reviews
Display Type	Digital
Immersion Depth	0.98 inches
Indoor Outdoor Usage	Outdoor
Item Length	2.44 inches
Manufacturer	YoSmart
Model	YS8004-UC
Model Name	Weatherproof Wireless Smart Temperature Sensor w/Probe LoRa 1/4 Mile Extreme Long Range
Number of Batteries	2 AAA batteries required. (included)
Outer Material	Plastic
Part Number	YS8004-UC
Power Source	Battery Powered
Product Care Instructions	Wipe Clean
Resolution	0.1°F or 0.1°C
Response Time	500 milliseconds
Reusability	Reusable
Special Feature	Waterproof
Specification Met	Industry Standards
Style Name	Without Hub
UPC	850024791046
Unit Count	1 Count
Upper Temperature Range	221 °F

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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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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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€ 75.62

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered 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 Belgium.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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