Level switch

Name: Level switch
Brand: WIKA

For the process industry, in laterally mounted external chamber

Output

change-over contact

Protection

IP65

RoHSEACDNV GLBureau VeritasCEEx ibII1GDEExiaIICPTB02ATEX2073

Price

On request

Depends on configuration

Request a quote

+38 (067) 285-77-70·info@avigan.com.uaViberTelegram

Description

In an external chamber (bypass chamber), a float with a permanent magnet moves on a guide tube in relation to the liquid level, following the principle of communicating vessels. Within the guide tube is fitted a reed contact (inert gas contact), which is energised, through the non-magnetic walls of the float and guide tube, by the approach of the float magnet. By using a magnet and reed contact the switching operation is non-contact, free from wear and needs no power supply. The contacts are potential-free.

for further approvals see page 2

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

Identification

Model	ELS-A
Product family	ELS
Subcategory	Float switch with external chamber

Process conditions

Process connection	Compression fitting with ferrule GE10-LR, galvanised steelCompression fitting with ferrule GE10-LR, brassFlange connectionThreaded nippleThreaded bushingCompression fitting with ferrule GE10-LR, stainless steel
Process temperature	−30…+150 °C
Max process pressure	40 bar
Measurement technology	float

Electrical characteristics

Output signal	change-over contact · AC ≤ 230 V; 40 VA; 1 A · DC ≤ 230 V; 20 W; 0.5 A · NAMUR
Electrical connection	Connection housing, aluminium 64 x 58 x 34 mm, cable entry in direction of process connection

Materials

Wetted parts material

Aluminium AlMg5, Red bronze Rg5, Stainless steel 1.4571, Titanium 3.7035, Buna (NBR)

Operating environment

Ambient temperature	−30…+150 °C
IP rating	IP65

Certifications and approvals

Certifications	RoHSEACDNV GLBureau VeritasCE
Explosion protection	II 1 GD EEx ia IIC PTB 02 ATEX 2073Ex ib

Additional details

Datasheet languages

Tables from datasheet

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

	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

	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

	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

View all (8)

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