ELA Float Level Switch Series: Reliable Cable-Type Level Control for Tanks, Ponds and Pump Applications

Reliable level control is essential in tanks, reservoirs, wastewater systems, pump stations and residential water storage applications. In many liquid level applications, the level switch must be simple, economical, easy to install and suitable for operation in particulate or difficult environments without jamming.

The ELA Float Level Switch Series is designed for these requirements. With cable-type float operation, IP68 protection options, different float materials, multiple contact ratings and filling or emptying control capability, ELA provides practical level control solutions for industrial facilities and residential applications.

What Is the ELA Series?

ELA is a cable-type float level switch product family used for tank, depot and wastewater plant level control in industrial facilities and dwellings.

The product family includes several models such as ELA 100, ELA 200, ELA 305s, ELA 400, ELA 500, ELA 600 and ELA 600/GSM. These models are designed for different liquid densities, temperatures, pressures, cable materials, float dimensions and control requirements.

The catalog states that ELA operates without problems in particulate environments thanks to its mechanical design, and there is no jamming. This makes it suitable for applications where simple and reliable level switching is required.

Application Areas

ELA float level switches can be used in many water and liquid level applications. Typical application areas include fish ponds, swimming pools, groundwater, wastewater pools, treatment pools, plunger pump applications, hydrophores and residential water tanks.

The series can also be used with different liquids depending on model and material compatibility. The catalog lists usable fluids such as water, wastewater, diesel, fuel oil, glycerine, gas, nitric acid 10%, acetic acid 10%, formaldehyde 40%, lactic acid 10%, hydrochloric acid 10% and sulfuric acid 30%.

Main Advantages

The ELA series offers three main advantages: easy installation, reliable operation and economical use.

Its cable-type float design allows straightforward installation in tanks and pits. The switching operation is mechanical and simple, making the product practical for pump control, filling control and emptying control applications.

Operating Principle

ELA float level switches work according to the angle change of the float body. As the liquid level rises or falls, the float changes position. When the float reaches the required tilt angle, the internal contact changes state.

Depending on wiring and installation, the switch can be used for filling, emptying, minimum level control or maximum level control.

The catalog diagrams show NO/NC contact behavior, differential area and SPDT or SPST switching structures depending on model.

ELA 100: Mini Float Level Switch

The ELA 100 is a compact float level switch suitable for liquid applications with minimum density of 0.75 g/cm³.

It has a 10° differential angle, maximum working temperature of 60 °C and maximum working pressure of 5 bar. The float material is PVC, and the float dimensions are 19 mm diameter x 150 mm length.

The cable material is 3 x 0.3 mm² silicone, contact capacity is 0.1 A / 60 VDC / AC, and contact structure is 1 x NO/NC. Protection class is IP68, and the process type is filling or emptying. The weight is 32 g for 3 m cable.

ELA 200: PU Float for Min/Max Control

The ELA 200 is a polyurethane float level switch used for liquid level detection with minimum liquid density of 0.75 g/cm³.

It has a 10° differential angle, maximum working temperature of 60 °C, maximum working pressure of 5 bar and IP68 protection class.

The float dimensions are 26 mm diameter x 50 mm length, and the cable is 3 x 0.3 mm² silicone. The standard contact capacity is 0.1 A / 60 VAC, with optional 4 A / 240 VAC or 10 A / 120 VAC. The contact is 1 x NO/NC.

ELA 200 is suitable for minimum or maximum control, with optional filling and emptying control.

ELA 305s, ELA 306s and ELA 307s: Stainless Steel Float Options

The stainless steel models are suitable for applications requiring stronger mechanical durability and higher temperature capability.

ELA 305s has a liquid density range of 0.6–1.4 g/cm³, a 10° differential angle, maximum working temperature of 120 °C and maximum working pressure of 10 bar. The float material is 304 stainless steel, and the float dimensions are 115 mm diameter x 180 mm length.

Its cable is 3 x 1 mm² silicone, contact capacity is 10 A / 120 VAC, and contact structure is 1 x NO/NC. Protection class is IP68, and it is suitable for filling and emptying. Weight is 750 g for 3 m cable.

ELA 306s and ELA 307s are also stainless steel models. They are designed for liquid density range of 0.8–1.2 g/cm³, maximum working temperature of 120 °C and maximum working pressure of 10 bar. ELA 306s has 80 mm diameter x 158 mm length, while ELA 307s has 65 mm diameter x 152 mm length.

These models offer different differential angle options such as 10°, 25° and 65°, depending on ordering configuration. Their contact structure is 1 x NO standard or NC optional, and protection class is IP68.

ELA 400: PP Float with 90° Differential Angle

The ELA 400 is a polypropylene float level switch for liquid applications with density range of 0.75–1.2 g/cm³.

It has a 90° differential angle, maximum working temperature of 80 °C and maximum working pressure of 2 bar. The float material is PP, and the float dimensions are 85 mm diameter x 155 mm length.

The cable material is 3 x 1 mm² rubber, contact capacity is 6 A / 250 VAC, and contact structure is 1 x NO/NC. Protection class is IP68 up to 20 m, and the switch is suitable for filling and emptying. Weight is 950 g for 5 m cable.

ELA 500: PP Float with PVC Cable

The ELA 500 is another polypropylene float model, designed for liquid density range of 0.75–1.2 g/cm³.

It has a 40° differential angle, maximum working temperature of 80 °C and maximum working pressure of 2 bar. Float dimensions are 96 mm diameter x 165 mm length.

The cable material is 3 x 0.75 mm² PVC, contact capacity is 6 A / 250 VAC, and contact structure is 1 x NO/NC. The protection class is IP68, and the process type is filling or emptying. Weight is 850 g for 5 m cable.

ELA 600: Four-Float Pump Control System

The ELA 600 is designed with four floats for more advanced filling and emptying control. It is suitable for liquid applications with minimum density of 0.75 g/cm³.

It has a 10° differential angle, maximum working temperature of 60 °C, maximum working pressure of 5 bar and PU float material. Each float has dimensions of 26 mm diameter x 150 mm length.

The cable is 3 x 0.3 mm² silicone, and the standard contact capacity is 0.1 A / 60 VAC, with optional 4 A / 240 VAC or 10 A / 120 VAC. The contact structure is 4 x NO/NC, and protection class is IP65.

The catalog diagram shows min, max, pump start/stop and pump stop/start levels, making ELA 600 suitable for pump automation and multi-point level control.

ELA 600/GSM: Remote Alarm Capability

The ELA 600/GSM combines four-float level control with a GSM alarm device installed inside the housing.

Its float-level specifications are similar to ELA 600, with minimum liquid density of 0.75 g/cm³, 10° differential angle, maximum working temperature of 60 °C, maximum working pressure of 5 bar, PU float material, 4 x NO/NC contacts and IP65 protection class.

The GSM alarm device supports GSM 900/1800 MHz dual band operation with internal antenna. It can send SMS and call alerts for Port1 alarm, Port1 OK, Port2 alarm and Port2 OK. With adapter use, it can also send SMS notifications for power failure and power restored.

The package includes 1 E-GSM alarm device, 1 x 12 V adapter, 2 x 12 V lithium batteries, 1 user manual and fixing screws with plugs. Battery life is more than 1 year under normal usage and 4 years with adapter, based on one alarm per day.

Electrical Connection and Pump Control

The catalog includes electrical connection diagrams for single-phase and three-phase pump control.

For single-phase maximum control, the diagram shows emptying operation. The pump starts at maximum level and stops when the float reaches the lower stop point. For single-phase minimum control, the diagram shows filling operation. The pump starts at minimum level and stops when the tank reaches the upper stop point.

Additional diagrams show filling and emptying control using multiple floats, contactors and signal lamps. These wiring examples make the ELA series suitable for pump start-stop automation, overflow prevention and dry-run protection.

Accessories and Ordering Options

The ELA series can be configured with several options. Available body materials include 304 stainless steel, 316 stainless steel, PVC, polypropylene and polyurethane.

Cable materials include PVC cable up to 60 °C, PVC cable up to 105 °C, silicone cable up to 200 °C, rubber cable up to 90 °C and steel shielded cable up to 350 °C.

Optional accessories include plastic housing with flange, aluminum housing with flange, E-GSM device, adapter threads 3/4 BSP and 1 BSP, Omron time relay and contactor.

Cable lengths include 3 m, 5 m, 10 m, 15 m and 20 m, with special lengths available on request.

Why Choose the ELA Series?

The ELA series is a strong choice for applications requiring simple, reliable and economical liquid level control. Its cable-type float design allows easy installation in tanks, ponds, pits and wastewater systems.

With different float materials, contact capacities, protection classes and cable options, the series can be adapted to a wide range of liquid level applications. The GSM version also provides remote alarm capability for installations where direct monitoring is difficult.

Conclusion

The ELA Float Level Switch Series provides practical cable-type level control for industrial and residential liquid applications. From compact models such as ELA 100 and ELA 200 to stainless steel models such as ELA 305s, multi-float pump control models such as ELA 600 and remote alarm versions such as ELA 600/GSM, the series offers flexible solutions for many level control requirements.

With easy installation, reliable operation, economical structure and compatibility with applications such as wastewater pools, treatment pools, hydrophores, residential tanks, swimming pools and pump systems, ELA is a dependable solution for filling, emptying and level control.