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+86 189 8978 2810

1 Inch Thread Stainless Steel Float Level Switch (Double Ball)

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1-inch threaded stainless steel double float switch

Standard rod-type liquid level controller

Upper and lower liquid level control

Corrosion-resistant stainless steel construction

Imported reed switch, high sensitivity

Laser welded, leak-proof design

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Application

Water Tanks & Storage Systems

Liquid level monitoring and control for water tanks, reservoirs, and storage equipment.

Water Heating & Solar Systems

Automatic level detection for water heaters and solar water applications.

Home Appliances & Water Devices

Level control solutions for water purifiers, drinking machines, humidifiers, and refrigeration equipment.

Industrial & Mechanical Systems

Reliable liquid level monitoring for industrial equipment, automotive systems, and machinery.

Agricultural Irrigation Systems

Automatic water level control for irrigation and agricultural water management applications.

Description

Description Background

The 1-inch threaded stainless steel double float level switch is a reed switch type liquid level controller designed for precise upper and lower liquid level detection in tanks and containers. It features a standard stainless steel rod structure with a 1” threaded connection (one-inch thread specification) for easy and compatible installation.

With a double float design, it enables more accurate liquid level control compared to single float models, making it suitable for upper and lower level monitoring applications. Made of high-quality stainless steel, it provides excellent corrosion resistance, high durability, and stable performance.

With laser welding technology, imported reed switch, and strict sealing design, it ensures reliable operation, long service life, and excellent waterproof performance without leakage.

Features

01DEPENDABLE
Made from high-quality stainless steel, offering excellent corrosion resistance, long service life, and stable performance in demanding environments.
Stainless Steel Construction for Long Service Life
Stainless steel construction provides long service life and stable performance
02EFFICIENT
Advanced seamless laser welding provides smooth, strong joints with excellent sealing performance, enhanced structural integrity, and long-term durability.
Precision Laser Welding for Durable Sealing
Precision laser welding with smooth, burr-free welds and a secure leak-resistant bottom
03SECURE
Designed to withstand temperatures up to 120°C, ensuring stable and reliable performance in high-temperature liquid applications and demanding industrial environments.
High-Temperature Resistant Design
High-Temperature Resistant Design
04CONVENIENT
Designed with durable materials and reliable construction for stable performance and extended service life, reducing maintenance and replacement costs.
Long Service Life
Long Service Life

Technical Details

Product Type:

Float Level Switch

Product Model:

G1-100-2 G1-150-2 G1-200-2 G1-250-2 G1-300-2 G1-350-2 G1-400-2 G1-450-2

Material:

Stainless Steel (304/316 Optional)

Size:

See attached drawing

Type:

1 Inch Thread Stainless Steel Float Level Switch (Double Ball)

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)

Thread Size:

1 inch (1” BSP/NPT Optional)

Installation Type:

Threaded Mounting

Protection Level:

IP65 or Higher

Accessories

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

What is a 1-inch thread stainless steel float level switch used for?

This float switch is mainly used for liquid level detection and automatic control in tanks, reservoirs, industrial containers, water treatment systems, and pump control systems. It can be used for: Pump control Overflow protection Dry-run protection Alarm systems Automatic liquid level monitoring The 1-inch threaded design provides stronger installation stability and is suitable for larger tanks or industrial equipment.

What material is the float switch made of?

The float ball and float body are made of SU304 stainless steel, offering: Excellent corrosion resistance High mechanical strength High temperature resistance Long service life For more demanding environments, 316 stainless steel customization is also available.

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 the float switch directly control pumps or solenoid valves?

No. Because the internal reed switch carries only a small current, it should not directly control high-power loads such as: Water pumps Solenoid valves AC contactors Large alarms Recommended solution: Solenoid valves or alarms → use a small relay Water pumps → use relay + AC contactor Direct connection may burn the reed contacts.

What are the typical technical specifications?

Typical specifications include: Max Contact Rating: 10VA / 50VA Max Switching Voltage: 100V AC/DC or 220V AC/DC Max Switching Current: 0.5A / 1.5A Max Breakdown Voltage: 110V AC/DC or 300V AC/DC Temperature Rating: -30°C to +120°C Actual specifications may vary depending on the selected model.

What are the advantages of the 1-inch thread design?

Compared with smaller threaded models, the 1-inch thread design provides: Stronger installation stability Better sealing performance Higher mechanical strength Better suitability for large tanks Easier compatibility with industrial pipelines This makes it suitable for industrial liquid level control applications.

Can the rod length and thread size be customized?

Yes. ELECALL supports: Rod length customization Thread size customization Float quantity customization Cable length customization OEM / ODM production Non-standard customization is supported for different installation requirements.

What liquids are suitable for this float switch?

Suitable for: Water Light oil Cooling liquid Industrial liquids Chemical media compatible with stainless steel Not recommended for: Heavy sludge Liquids with large floating debris Because floating objects may affect switching stability.

What should buyers confirm before purchasing?

Buyers should confirm: Liquid type Working temperature Working pressure Installation direction Thread size Rod length Cable length NO or NC logic Quantity Customization requirements Clear specifications help avoid installation problems later.

What are the advantages of the double-ball model?

Compared with single-ball models, double-ball float switches provide: Larger liquid level differential More stable switching Better pump protection Reduced frequent start/stop This is especially useful for automatic pump control systems.

When should buyers choose the double-ball model?

Choose double-ball if: A larger liquid level difference is required Pump start/stop control is needed Frequent motor starting should be avoided The tank has enough installation space Double-ball models help improve system stability and extend pump lifespan.

Can float spacing be customized in double-ball models?

Yes. The float spacing can be customized according to the required liquid level differential and installation structure. This helps improve control stability for different industrial systems.

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