SKU: 94563297220

Neptune System 4" Liquid Level Sensor With Clip Mount

Sale price$80.10 Regular price$89.00
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Description

Neptune System 4" Liquid Level Sensor With Clip MountLLS 4 The 4 LLS is the smallest of the four sensor offerings. It is the perfect fit for small reservoirs for small sumps, ATO reservoirs and additive containers. This can be a great solution to double check that liquid additions of your additives match your dosing solution over a period of time. For example, if you dosed 250 mL additives over two weeks and you know each inch is 100 mL, then the additive reservoir liquid level would have decreased

LLS-4

The 4″ LLS is the smallest of the four sensor offerings.  It is the perfect fit for small reservoirs for small sumps, ATO reservoirs and additive containers.  This can be a great solution to double check that liquid additions of your additives match your dosing solution over a period of time.  For example, if you dosed 250 mL additives over two weeks and you know each inch is 100 mL, then the additive reservoir liquid level would have decreased exactly by 2.5″.

Never before offered in the aquarium industry the LLS Sensors allow for the measurement of water depth in inches or centimeters.  Available in four different sizes- 4″, 15″ 23″ and 35″ each sensor has a special place in helping understand the water level in the sump, aquarium, reservoirs, and other liquid-holding containers.  No longer does one need to physically look to observe how much water level is above or below a specific point, but now simply open the Apex Fusion App and observe.

The LLS sensor can connect to any available FMM port in the Apex System.  Liquid will enter the plastic envelope around the thin material of the sensor.   Once the liquid is in contact with the sensor material the LLS uses a patented resistive sensing technology to accurately and reliably measure the liquid level in a container.

Included with each LLS sensor is a clip that allows for the mounting of the sensor to the side of the sump, aquarium or container.  Have a Euro braced sump?  Don’t worry you can simply mount the LLS sensor to a baffle inside the sump.

Later in 2022 Neptune Systems will release a magnetic version of this clip and a clip that mounts to a euro-braced sump or aquarium.

Generally the sensors respond to liquid level changes at a rate of about fifteen seconds per inch of water level change.  So if the water level was suddenly decreased three inches, then it could take up to forty-five seconds to reflect this change.  While quick depth level changes are uncommon in an aquarium, and, typically, changes  are reflected more quickly than this, for this reason, it is best practice not to use the LLS for immediate control needs— like auto top-off control.

Once calibrated the LLS is accurate to about two-tenths of an inch.

Liquid Level Sensor- 4″ (LLS-4)

The 4″ LLS is the smallest of the four sensor offerings.  It is the perfect fit for small reservoirs for small sumps, ATO reservoirs and additive containers.  This can be a great solution to double check that liquid additions of your additives match your dosing solution over a period of time.  For example, if you dosed 250 mL additives over two weeks and you know each inch is 100 mL, then the additive reservoir liquid level would have decreased exactly by 2.5″.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 94563297220

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J
Job
Port Orchard, US
★★★★★ 5
Great basic and timeless design
Size: 12 Little Kid, Color: Brown
These sandals are a great find! They’re super easy to get on and off thanks to the Velcro straps, which is a huge win for little ones learning to be more independent. The fit is adjustable and secure, so they stay in place well during all kinds of play. The cork-style footbed is comfortable and gives good support, and the overall design feels sturdy enough to handle everyday wear. They’re lightweight but still durable, and have held up really well so far. They also have a classic, versatile look that goes with just about everything, perfect for summer outfits. Overall, a reliable, comfortable sandal that’s great for active kids. Would definitely buy again!
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Reviewed in the United States on April 24, 2026
N
Nicole
Alexandria, US
★★★★★ 5
Great option for boys or girls
Size: 13 Little Kid, Color: Black, Size: 13 Little Kid, Color: Black
This is really more of a unisex option for a sandal. I have sandals that look like this, and both of my children have worn this style. I ordered these for my daughter, with the plan to pass them down to my son if they're not too worn when she outgrows them. The style is very minimalistic, so it goes with lots of outfits. All the straps are easily adjustable, so you can get a good fit. I would say the length is true to size, but the width is maybe a bit wide. Nevertheless, the adjustable straps really help them fit well. They feel really sturdy and I appreciate that the sole has cushion to it. My daughter has worn these every day since I got them out of the closet and they're holding up well.
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Reviewed in the United States on February 19, 2026
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Verified Purchase
Cliente Amazon
Whiting, US
★★★★★ 1
Velcro strap non durable.
Size: 10.5 Little Kid, Color: Oltremare
The Velcro strap stop working after using the shoes for only less than 2 month.
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Reviewed in the United States on July 19, 2025
C
Verified Purchase
Cliente Amazon
Draper, US
★★★★★ 1
Velcro strap non durable.
Size: 10.5 Little Kid, Color: Oltremare
The Velcro strap stop working after using the shoes for only less than 2 month.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 19, 2025
C
Verified Purchase
Cliente Amazon
Birmingham, US
★★★★★ 1
Velcro strap non durable.
Size: 10.5 Little Kid, Color: Oltremare
The Velcro strap stop working after using the shoes for only less than 2 month.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 19, 2025

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