which direction is open and which is closed?

I tried to post a photo, but couldnt figure that out. A picture is worth a thousand words but ill try to do it with less words than that. mount the device at the top of the tank, if the tank is full the float is up and the circuit is open...(In my case the alert light is off) . If the water level drops, the float drops and the circuit is closed and my alert light is on

What is the length of the leads on this switch?

I didnt measure the leads, but Id say 8"

what is the "closed" position (aka circuit continuity)?

When the tank is full continuity is open or broken, when the tank is low continuity is closed or made. Travel is aprox. 1 1/4 inch.

Can I use it in a hot water tank?? 203 F

I installed mine in the coolant expansion tank in my car. and it works there, but its only been a week, so I cant say long term

Devmo Mini Indicator Vertical Water Level Sensor Stainless Steel 45mm

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Description

💡 Elevate Your Monitoring Game!

🌍 VERSATILE USE - Adaptable for various environments—works with different liquids, pressures, and temperatures.
♻️ ECO FRIENDLY - Mercury-free design ensures safety and sustainability.
🔒 HIGH RELIABILITY - Count on consistent performance with a lightweight and simple working principle.
🔄 DUAL INSTALLATION - Install at the top or bottom of your tank to monitor water levels as they rise or fall.
🔧 EASY INSTALLATION - Effortlessly set up your liquid level controller with a straightforward design.

The DEVMO Mini Indicator Vertical Water Level Sensor is a compact, stainless steel float switch designed for reliable liquid level detection in various environments. Weighing only 59 grams, it features a simple installation process and can be mounted at either the top or bottom of a tank, making it a versatile choice for both residential and industrial applications.

Specifications

ASIN	B07T18PGJ4
Best Sellers Rank	#126,337 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #126 in Water Pump Accessories
Brand	DEVMO
Brand Name	DEVMO
Current Rating	0.5 Amps
Current rating	0.5 Amps
Customer Reviews	4.3 out of 5 stars 40 Reviews
Item Weight	0.06 Kilograms
Item weight	0.06 Kilograms
Manufacturer	DEVMO
Material	Stainless Steel
Material Type	Stainless Steel
Maximum Supply Voltage	100 Volts (DC)
Maximum supply voltage	100 Volts (DC)
Model	WS-xxxx
Mounting Type	Flange Mount
Output Type	NPN, PNP, Push-Pull
Sensing Distance	45 Millimeters
Specific Uses For Product	electronic, electrical, chemical, water treatment, and drainage applications for level control and alarm
Style	Modern
Style Name	Modern
UPC	796753378526
Unit Count	1.0 Count
Upper Temperature Rating	125 Degrees Celsius

Reviews

C**L

Works as expected

Very neat, does what I need it to do. The length of the leads is sufficient to reach a terminal block nearby. I connected it to a relay board with leds and I could see (and hear) how it switched consistently as I moved it up and down in a glass of water.

5.01.2025

R**N

Works great

Works perfectly

14.05.2026

J**T

Simply what I needed

Laboratoire pharma , prix super

9.11.2024

Z**Y

Easy to wire with optional mounting and lasted a good while.

Worked very well and I wired it inverted (an option). Lasted longer than other switches until the lime water here finally took it out. I recommend this switch.

19.04.2026

A**M

PERFECT replacement for Doyon QUF350

we bought this as a replacement for Doyon QUF350 and it worked right away.

7.04.2024

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