Question 1

Does the entire cable detect water or just the tip on the end?

Accepted Answer

The sensor cable of the YoLink Water Leak Sensor 2 detects water along the length of the cable. For more information, please kindly refer to the following guide http://www.yosmart.com/support/YS7904-UC/docs/instruction

Question 2

I plan to submerge v3 type of the sensor in the sump pump. I wonder if the "dirty" water will corrode/damage the sensor?

Accepted Answer

It is possible for the probe cable to get a build-up that can slow the response time, particularly slow drying (as the gunk on it might hold moisture). For this application, I recommend wiring our sensor to a float switch. It will work great, even in a dirty water environment.

We do not suggest any particular model. Most of them are interchangeable by flipping the float around 180° but you want one that has closed contacts when in the water-detected/high position, for it to give you a "water detected" indication on the app. It is possible to work with the opposite (open) and get the desired response and notifications in automation settings but the app will display it as no-water when you have water at the float.

Eric with YoSmart

Question 3

How many sensors can i "pair" with one hub? i have 3 basements that i need to monitor. or do i need a hub for each sensor?

Accepted Answer

128 pairs!

You will need a hub at each building, but unless you have a very large building, or a lot of RF obstructions, you should be fine with just one hub.

Eric with YoSmart

Question 4

Will laying this cable on a conducting metal surface trigger the alarm? I.e. inside a water heater pan?

Accepted Answer

No, the metal will not impact its operation. Do keep in mind, the sensor body should not get wet. That has to stay outside the pan. You might consider instead our Water Leak Sensor 1. You can look at customer-submitted photos and find several instances of this sensor being placed in a water heater or air conditioner pan.

https://www.amazon.com/dp/B07Z7QWJBP?ref=myi_title_dp&th=1

ASIN	B08P1WD66X
Best Sellers Rank	#11,138 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Water Detectors & Alarms
Brand	YoLink
Brand Name	YoLink
Customer Reviews	4.5 out of 5 stars 944 Reviews
Item Dimensions	3.27 x 0.59 x 1.22 inches
Item Highlight	Cable Leak Detection, App, Email and Text Alerts, Works with Alexa/IFTTT, LoRa YoLink Protocol Up to 2034 Feet, Hub Required
Item dimensions L x W x H	3.27 x 0.59 x 1.22 inches
Manufacturer	YOSMART
Material	Plastic
Material Type	Plastic
Maximum Supply Voltage	3 volts_of_direct_current
Measuring Range	32°F - 122°F
Model	YS7904-UC
Mounting Type	Wall Mount
Number of Items	1
Output Type	Digital
Part Number	YS7904-UC
Sensing Distance	0.25 miles
Specific Uses For Product	Amateur, Inside, Professional
Style	Without Hub
Style Name	Without Hub
UPC	850024791091
Unit Count	1 Count
Upper Temperature Rating	122 °F
Warranty Description	2 Years

Water Leak Sensor 2, 105 dB Alarm, YS7904G

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