# Level switch — ELS-A

> For the process industry, in laterally mounted external chamber

- Catalog code: els
- Model: ELS-A
- Category: Level measurement › Float switches
- Product page: https://avigan.com.ua/wika/en/products/els
- Price: on request
- Supplier: AVIGAN (TOV VIKA Prylad), official WIKA partner in Ukraine

## Overview

The level switch model ELS can be used for turbulent liquid levels. In addition to a long service life, it offers a simple functional principle. Learn more.

## Applications

- Mounting on engines, tanks, vessels or enclosures, where, due to a lack of space, installation within them is not possible
- Use for turbulent liquid levels such as in oil sumps in large engines, gearboxes etc.
- Pump and level control and monitoring of distinct filling levels
- Chemical, petrochemical industry, natural gas, offshore, shipbuilding, machine building, power generating equipment, power plants
- Process water and drinking water treatment

## Special features

- Freely selectable switch position through fixing the float switch at the required level
- Large range of application due to the simple, proven functional principle
- For harsh operating conditions, long service life
- Operating limits: Operating temperature: T = -30 ... +150 °C Operating pressure: P = Vacuum up to 40 bar Limit density: ρ ≥ 600 kg/m 3
- Operating temperature: T = -30 ... +150 °C
- Operating pressure: P = Vacuum up to 40 bar
- Limit density: ρ ≥ 600 kg/m 3

## Specifications

| Parameter | Value |
|---|---|
| model | ELS-A |
| product family | ELS |
| short description | Float switch for process industry with external chamber, lateral installation, suitable for harsh operating conditions and turbulent liquid levels. |
| subcategory | Float switch with external chamber |
| certifications | RoHS; EAC; DNV GL; Bureau Veritas; CE |
| explosion protection | II 1 GD EEx ia IIC PTB 02 ATEX 2073; Ex ib; II 1 GDEEx ia IIC PTB 02 ATEX 2073; II1GDEExiaIICPTB02ATEX2073 |
| ambient temp | -30 … 150 °C |
| ip rating | IP65 |
| languages in datasheet | en |
| technology | float |
| output signal | change-over contact; AC ≤ 230 V; 40 VA; 1 A; DC ≤ 230 V; 20 W; 0.5 A; NAMUR |
| process connections | Compression fitting with ferrule GE10-LR, galvanised steel; Compression fitting with ferrule GE10-LR, brass; Flange connection; Threaded nipple; Threaded bushing; Compression fitting with ferrule GE10-LR, stainless steel |
| wetted parts material | Aluminium AlMg5; Red bronze Rg5; Stainless steel 1.4571; Titanium 3.7035; Buna (NBR) |
| process temp | -30 … 150 °C |
| process pressure max bar | 40 |
| electrical connection | Connection housing, aluminium 64 x 58 x 34 mm, cable entry in direction of process connection |

## Datasheet tables

| Logo | Description | Country |
|---|---|---|
|  | EU declaration of conformity ■ Low voltage directive ■ RoHS directive | European Union |
|  | EAC EMCdirective and low voltage directive No.RU Д-DE.A301.B.00815 | Eurasian Economic Community |
|  | DNV GL Ships, shipbuilding (e.g. offshore) No.TAA00001YK | International |
|  | Bureau Veritas Ships, shipbuilding No. 30168/B0 BV | International |

| 1 | Model ELS-A |
|---|---|
| External chamber | Aluminium AlMg5 |
| Electrical connection | Connection housing, aluminium 64 x 58x34mm Cable entry in the direction of the process connection (other alignment on request) |
| Process connection | Compression fitting with ferrule GE10-LR, galvanised steel (other sizes on request) |
| Max. operating pressure | 1 bar Special version: 6 bar |
| Guide tube | Material: Stainless steel 1.4571 Diameter:12mm |
| Float | Material: Stainless steel 1.4571, Buna (NBR) or titanium 3.7035 Float diameter: 40 ...52mm Float selection depending on process conditions (see page 6) |
| Temperature range | -30 ...+150 °C |
| Switching function | Change-over Switch position fixed (centred, see drawing) |
| Max. number of contacts | 1 change-over |
| Switching power, change-over | AC ≤ 230 V; 40 VA; 1 A DC ≤ 230 V; 20 W;0.5 A |
| Mounting position | Vertical ±30° |
| Ingress protection | IP65 per IEC/EN 60529 |

| 1 | Model ELS-B |
|---|---|
| External chamber | Red bronze Rg5 |
| Electrical connection | Connection housing, aluminium 64 x 58x34mm Cable entry in the direction of the process connection (other alignment on request) |
| Process connection | Compression fitting with ferrule GE10-LR, brass (other sizes on request) |
| Max. operating pressure | 6 bar |
| Guide tube | Material: Stainless steel 1.4571 Diameter:12mm |
| Float | Material: Stainless steel 1.4571, Buna (NBR) or titanium 3.7035 Float diameter: 40 ...52mm Float selection depending on process conditions (see page 6) |
| Temperature range | -30 ...+150 °C |
| Switching function | Change-over Switch position fixed (centred, see drawing) |
| Max. number of contacts | 1 change-over |
| Switching power, change-over | AC ≤ 230 V; 40 VA; 1 A DC ≤ 230 V; 20 W;0.5 A |
| Mounting position | Vertical ±30° |
| Ingress protection | IP65 per IEC/EN 60529 |

| 1 | Model ELS-S |
|---|---|
| External chamber | Stainless steel 1.4571 |
| Electrical connection | Connection housing, aluminium 64 x 58x34mm Cable entry in the direction of the process connection (other alignment on request) |
| Process connection | ■ Flange connection ■ Threaded nipple ■ Threaded bushing ■ Compression fitting with ferrule GE10-LR, stainless steel (other sizes on request) |
| Max. operating pressure | Chamber end top Ø100 = 1 bar Chamber end top Ø130 = 40 bar The maximum pressure is also limited by the float. |
| Guide tube | Material: Stainless steel 1.4571 Diameter:12mm |
| Float | Material: Stainless steel 1.4571, Buna (NBR) or titanium 3.7035 Float diameter: 40 ...52mm Float selection depending on process conditions (see page 6) |
| Temperature range | -30 ...+150 °C |
| Switching function | Change-over Switch position fixed (centred, see drawing) |
| Max. number of contacts | 1 change-over |
| Switching power, change-over | AC ≤ 230 V; 40 VA; 1 A DC ≤ 230 V; 20 W;0.5 A |
| Mounting position | Vertical ±30° |
| Ingress protection | IP65 per IEC/EN 60529 |

| Material | Version | Suits guide tube Ø inmm | Ø A inmm | B inmm | Ø C inmm | Max. operating pressure in bar | Max. operating temp. in °C | Limit density 85 %in kg/m 3 | Order no. |
|---|---|---|---|---|---|---|---|---|---|
| Stainless steel 1.4571 | V52A | 12 | 52 | 52 | 15 | 40 | 300 | 770 | 5462 |

| Material | Version | Suits guide tube Ø inmm | Ø A inmm | B inmm | Ø C inmm | Max. operating pressure in bar | Max. operating temp. in °C | Limit density 85 %in kg/m 3 | Order no. |
|---|---|---|---|---|---|---|---|---|---|
| Stainless steel 1.4571 | V44A | 12 | 44 | 52 | 15 | 16 | 300 | 780 | 9681 |
| Titanium 3.7035 | T44A | 12 | 44 | 52 | 15 | 16 | 300 | 600 | 9744 |
| Buna (NBR) | B40A | 12 | 40 | 30 | 15 | 3 | 80 | 580 | 9728 |

| Contact protection relays | Contacts | Input | Power supply | Approval number | Order no. |
|---|---|---|---|---|---|
| KFD2-ER-1.6 | 1 x change-over AC 250 V, 2 A | 2 x contacts | DC 20 ...30V | - | 112941 |
| KFD2-SR2-Ex2.W | 2 x change-over AC 253 V, 2 A | 2 x contacts | DC 20 ...30V | II 1 GDEEx ia IIC PTB 02 ATEX 2073 | 112944 |
| KFA6-ER-1.6 | 1 x change-over AC 250 V, 2 A | 2 x contacts | AC 230V | - | 112942 |
| KFA6-SR2-Ex2.W | 2 x change-over AC 253 V, 2 A | 2 x contacts | AC 230V | II 1 GDEEx ia IIC PTB 02 ATEX 2073 | 112943 |

| RC element | Capacitance | Resistance | Voltage | Order no. |
|---|---|---|---|---|
| B3/115 | 0.33 µF | 470 Ohm | AC 115V | 110446 |
| B3/230 | 0.33 µF | 1,000 Ohm | AC 230V | 110460 |

## Documents

- [ds_lm3003_en_co_3f22fc](https://avigan.com.ua/wika/docs/wika/ds_lm3003_en_co.pdf) — PDF, 595 KB, en