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+86 189 8978 2810

Stainless Steel Flange-Mounted Float Level Switch(double ball)

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Upgraded removable flange double-ball float level switch

Dual installation modes: 1-inch thread / DN25 flange

Dual-point level control (high and low level switching)

Suitable for automatic filling and draining systems

Secure installation with excellent sealing performance

High-quality corrosion-resistant stainless steel structure

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Application

Industrial Storage & Water Tanks

Liquid level monitoring and control for large storage tanks, reservoirs, and industrial containers.

Water Treatment Systems

Reliable level detection for water treatment equipment, filtration systems, and process water applications.

Chemical & Industrial Equipment

Suitable for chemical liquid storage, industrial machinery, and harsh operating environments.

Pump Control & Automation Systems

Automatic filling, draining, and pump start/stop control with stable level switching.

High/Low Level Alarm Systems

Dual-point level control for upper and lower limit detection in tanks, boilers, and pressure vessels.

Description

Description Background

The stainless steel removable flange float level switch is a reed switch type liquid level controller designed for reliable monitoring in industrial and commercial applications. Featuring a removable flange structure, it provides secure installation, excellent sealing performance, and strong vibration resistance, making it ideal for large tanks and industrial equipment.

With dual installation options of 1-inch threaded mounting and DN25 flange mounting, the switch offers flexible installation and convenient maintenance. The flange gasket sealing design effectively prevents leakage, while the double-ball structure enables upper and lower level control for automatic filling, draining, and alarm systems.

Made of high-quality stainless steel with imported reed switch components and laser welding technology, the product delivers excellent corrosion resistance, stable switching performance, and long service life. It is widely used in storage tanks, water treatment systems, chemical equipment, and industrial automation applications.

Features

01DEPENDABLE
The large Hirschmann-type connector provides ample wiring space and a secure connection. Precision-machined interfaces ensure reliable sealing to effectively prevent water ingress, while the accessible connector design makes inspection and maintenance easier.
Precision Machining · Leak-Proof Sealing · Easy Inspection
Large Hirschmann-type connector with precision-machined leak-proof sealing on stainless steel float level switch
02EFFICIENT
Equipped with a high-quality reed switch for fast and sensitive level detection, with excellent durability and a long service life.
High-Quality Reed Switch
High-Quality Reed Switch
03SECURE
IP68 Waterproof & Dustproof Fully sealed housing provides excellent protection against dust and water ingress, ensuring reliable operation in harsh and wet environments.
IP68 Dustproof and Waterproof
IP68 Dustproof and Waterproof
04CONVENIENT
Supports two installation options: 1" threaded connection or DN25 flange mounting, offering greater installation flexibility and convenience.
Removable Flange · Dual Mounting Options
Removable Flange · Dual Mounting Options

Technical Details

Product Type:

Float Level Switch

Product Model:

ES10010-FL

Material:

Stainless Steel (304/316 Optional)

Size:

See attached drawing

Type:

Stainless Steel Flange-Mounted Float Level Switch

Operating Temperature:

-30°C to +120°C

Max Contact Rating:

10VA (1A1) / 50VA (2A1)

Max Switching Voltage:

100V AC/DC (1A1) / 220V AC/DC (2A1)

Max Switching Current:

0.5A (1A1) / 1.5A (2A1)

Max Breakdown Voltage:

110V AC/DC (1A1) / 300V AC/DC (2A1)

Max Contact Resistance:

100mΩ (1A1 / 2A1)

Installation Type:

1 Inch Thread / DN25 Flange Mounting

Switch Type:

Imported Reed Switch

Protection Level:

IP65 or Higher

Flange Material:

Stainless Steel

Accessories

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

What is a flange mounted float level switch used for?

This flange mounted float level switch is used for liquid level detection and automatic control in industrial tanks, vessels, and closed containers. It is commonly used for: Pump control High/low level alarm Overflow protection Dry-run protection Industrial liquid level automation The flange mounting design provides a secure, leak-resistant installation, especially suitable for tanks requiring stronger sealing than threaded types.

What is the advantage of flange mounting?

Flange mounting offers: Strong and stable installation Better sealing performance Suitable for pressure or sealed tanks Reduced leakage risk More durable for industrial environments It is widely used in chemical, water treatment, and process control systems.

What material is the float switch made of?

The float switch is made of SU304 stainless steel, including the float ball and rod structure. It provides: Corrosion resistance High strength Good temperature resistance Long service life 316 stainless steel is available for more corrosive media.

Is it normally open (NO) or normally closed (NC)?

It supports both Normally Open (NO) and Normally Closed (NC), depending on the float orientation. The switching logic can be changed by reversing the float by 180°. Lower-Open Type (Default) ① When the liquid level rises, the float moves away from the reed switch position, and the switch turns OFF. ② When the liquid level falls, the float returns to the reed switch position, and the switch turns ON. Upper-Open Type ① When the liquid level rises, the float returns to the reed switch position, and the switch turns ON. ② When the liquid level falls, the float moves away from the reed switch position, and the switch turns OFF. Note The factory default is usually the lower-open type, but users can adjust it according to control requirements.

Can it directly control pumps or solenoid valves?

No — not recommended for direct load switching. The internal reed switch is designed for low-current signal applications and should not directly control inductive or high-power loads such as pumps or solenoid valves. Recommended solution: Control signal → relay or PLC input Pump or valve → relay / contactor / motor starter ⚠️ In low-power applications (small DC pumps or low-current valves), direct switching may be possible only if the load is within the switch rating. Direct connection may reduce lifespan or damage the reed contacts.

What are the advantages of flange mounted design compared to threaded type?

Compared with threaded installation, flange type provides: Higher sealing reliability Better pressure resistance Stronger mechanical stability Safer installation for large tanks Reduced risk of loosening or leakage

What liquids is it suitable for? Suitable for:

Suitable for: Water Oil Industrial liquids Chemical solutions compatible with stainless steel Cooling fluids Not suitable for: Heavy sludge High-viscosity fluids Liquids with large solid particles

Can rod length or flange size be customized?

Yes. Customization options include: Rod length Flange specification Float quantity Cable length Electrical output configuration OEM / ODM production

What should buyers confirm before ordering?

Before purchase, confirm: Liquid type Working temperature Working pressure Tank structure Flange standard and size Rod length Electrical logic (NO / NC) Cable requirements Quantity and customization needs

What is a double-ball float level switch used for?

This double-ball float level switch is used for liquid level detection and automatic start/stop control in industrial tanks, reservoirs, and process systems. It is especially suitable for: Pump start/stop control Automatic filling systems Automatic drainage systems Wastewater and industrial tank control Applications requiring a stable level differential (hysteresis control) Compared with single-ball models, the double-ball design provides two switching points, enabling more stable and reliable automation.

How does the double-ball design work?

The double-ball structure uses two float positions: One for upper level control One for lower level control This creates a liquid level differential (hysteresis), meaning the system will not switch on/off frequently when the liquid level fluctuates slightly. This helps improve system stability and protect pumps.

What is the main advantage of the double-ball structure?

The key advantages are: Larger liquid level differential Reduced pump cycling (prevents frequent ON/OFF) Improved system stability Longer pump lifespan Better automation control performance This makes it ideal for pump protection systems.

When should a double-ball model be selected?

Choose double-ball if: Pump start/stop control is required A stable liquid level range is needed Frequent switching must be avoided System stability is important Industrial automation control is required

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