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+86 189 8978 2810

EM15-221 High-Sensitivity Mercury Cable Float Level Switch

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High-sensitivity mercury float level controller

Automatic liquid level adjustment and pump control

Stable mercury switch with reliable conductivity

Suitable for sewage, oil, and weak chemical liquids

Easy installation with maintenance-free operation

Multiple cable lengths available for customization

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Application

Sewage & Wastewater Systems

Water Tanks & Reservoirs

Oil & Chemical Liquid Containers

Pump Control Systems

Industrial Storage Tanks

Description

Description Background

The EM15-221 Mercury Cable Float Level Controller is a high-sensitivity float switch designed for automatic liquid level control in tanks, pits, wells, sewage systems, and industrial liquid containers. Equipped with a mercury switch structure, it provides stable switching performance, reliable conductivity, and smooth operation for automatic pump and level control applications.

Featuring automatic adjustment, easy installation, and maintenance-free operation, the EM15-221 is built with a durable polypropylene float body that offers excellent corrosion resistance and stable buoyancy. The robust cable design ensures reliable performance in sewage, oil, weak acid, and weak alkali liquid environments.

Multiple controllers can be connected for advanced applications, including dry-run pump protection, dual-pump control, and multi-point liquid level management systems, making it ideal for long-term industrial operation.

Features

01DEPENDABLE
High-Quality Cable Construction – Equipped with a durable and flexible cable, providing excellent wear resistance, stable electrical performance, and reliable operation in various liquid level control applications.
High Quality Cable for Reliable Liquid Level Control
High quality cable used for float level switches with excellent durability and flexibility
02EFFICIENT
High-Sensitivity Mercury Switch – Features a sensitive mercury switch mechanism with fast response, accurate switching, and extended service life for reliable automatic level control.
Mercury Switch for Float Level Control Applications
Mercury switch component used in float level switches for automatic liquid level control
03SECURE
Up to 80°C Temperature Resistance – Designed to withstand temperatures up to 80°C, ensuring stable performance in high-temperature and humid environments.
Heat Resistant
HEAT RESISTANT
04CONVENIENT
Long Service Life & Reliable Performance – Built with high-quality components and a robust design to deliver long-lasting operation and consistent liquid level control performance.
Long Service Life
Long Service Life

Technical Details

Product Type:

Float Level Controller

Product Model:

EM15-221 Mercury Version

Material:

Polypropylene

Type:

Mercury Switch Type Float Level Controller

Operating Temperature:

0°C to +80°C

Working Voltage:

0~24V

Power Range:

<750W / 1500W

Control Range:

Liquid level difference >30cm

Contact Switch:

Mercury Switch

Float Ball Density:

0.69g/cm³

Lead Length:

5m / 10m / 20m (customizable)

Wire Diameter Specification:

0.5mm² / 1.0mm²

Installation Type:

Cable Suspended Type

Product Color:

Orange / Black (depending on model)

Applicable Liquids:

Sewage, oil, weak acid, weak alkali liquids

Accessories

We reserve the right to make technical alterations without prior notice.
wiring diagram

What type of switch does this product use?

The product uses a high-sensitivity mercury switch structure with stable conductivity and reliable switching performance.

What are the advantages of a mercury switch?

Mercury switches offer: High sensitivity Smooth switching action Stable electrical conductivity Reliable long-term operation

What environments is this product suitable for?

It is suitable for: Sewage and wastewater systems Oil tanks and liquid containers Weak acid and weak alkali liquids Water tanks and reservoirs Industrial liquid level control systems

Can it automatically control water pumps?

Yes. The float switch can automatically start or stop pumps according to liquid level changes.

Can multiple float switches be used together?

Yes. Multiple controllers can be connected together for dry-run protection, multi-point liquid level control, and dual-pump systems.

Is installation complicated?

No. The cable suspended structure makes installation simple and convenient.

Is the cable length customizable?

Yes. Standard cable lengths include 5m, 10m, and 20m. Custom lengths are also available.

Can it be used in corrosive liquid environments?

Yes. The polypropylene float body provides good resistance to sewage, oil, weak acid, and weak alkali liquids.

What is the recommended liquid level difference?

The recommended liquid level difference is greater than 40cm for stable operation.

Does it require a contactor?

When the load exceeds 12W, a contactor is recommended to improve safety and extend service life.

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