OLS-S

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WIKA · Level measurement · Family OLS

Optoelectronic level switch

Name: Optoelectronic level switch
Brand: WIKA

Optoelectronic level switch for detection of limit levels in liquids, independent of physical characteristics like refractive index, color, density, dielectric constant, and conductivity.

Range

0.025…0.96 m

Accuracy

±0.5 mm

Protection

IP66

EACCEEU declaration of conformityEMC directiveLow voltage directive

Price

On request

Depends on configuration

Request a quote

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Description

The model OLS optoelectronic level switch is used for the detection of limit levels in liquids. This is widely independent of physical characteristics such as refractive index, colour, density, dielectric constant and conductivity. Measurement is also done in small volumes.

The switches consist of an infrared LED and a phototransistor. The light of the LED is directed into a prism. So long as the sensor tip of the prism is in the gas phase, the light is reflected within the prism to the receiver. When the liquid in the vessel rises and wets approximately 2/3 of the glass tip, the infrared lightbeam into the liquid is interrupted and only a small portion reaches the receiver. This difference is evaluated by the electronics and triggers a switching operation.

Fig. left: Model OLS-H, high-pressure version Fig. centre: Model OSA-S, 19" plug-in card

Fig. right: Model OSA-S, polycarbonate add-on case

The instruments are very robust and designed for rough operating conditions.

The cable to the switching amplifier does not need any shield, enabling easy and economic cabling. The model OSA-S switching amplifier is operated with an intrinsically safe signal circuit. For the 19" plug-in card version, all operating elements, except for the switch for changing the alarm direction and the potentiometers for the time delay, can be accessed from the front. If incorporated in an add-on case, a transparent cover allows seeing the switching statuses.

Special features

Temperature ranges from -269 ... +400 °C
Versions for pressure ranges from vacuum to 500 bar
Special versions: High pressure, interface measurement
Signal processing is made using a separate model OSA-S switching amplifier

Identification

Model	OLS-S
Product family	OLS
Subcategory	optoelectronic

Measuring range

Level ranges

0.025…0.96 m

Process conditions

Process connection	1/2 NPTFlangeG 1/2 A
Process temperature	−269…+400 °C
Max process pressure	500 bar
Measurement technology	vibration_fork

Electrical characteristics

Power supply	AC 230 V, AC 115/120 V, AC 24 V, DC 24 V
Electrical connection	M20 x 1.5

Materials

Wetted parts material

stainless steel 1.4571, Hastelloy, 1.4301, Clad core glass, quartz, sapphire

Operating environment

Ambient temperature	−65…+95 °C
IP rating	IP66

Certifications and approvals

Certifications

EACCEEU declaration of conformityEMC directiveLow voltage directive

Additional details

Datasheet languages

EN, DE

Tables from datasheet

Model	Description	Max. pressure in bar	Medium	Ambient
		Standard	High-pressure	temperature	temperature
OLS-S, OLS-H	Optoelectronic level switch	250 bar	500 bar	-269 ...+400 °C	-65 ...+95 °C
OSA-S	Switching amplifier for optoelectronic level switches	-		-	-40 ...+60 °C

Logo	Description	Country
	EU declaration of conformity ■ EMCdirective ■ Low voltage directive	European Union
	EAC (option) ■ EMCdirective ■ Low voltage directive	Eurasian Economic Community

Specifications
Switch point ML	Standard: 25 mm, with extension 50 ...960mm
Insertion length EL	Standard: 29 mm(ML + 4 mm)
Medium temperature	-65 ...+250 °C
Ambient temperature	-65 ...+95 °C
Pressure range	0 ... 250 bar
Measurement type	Level measurement with glass tip shapeV Option: Interface layer
Glass protection	Guard finger
Process connection	G1/2 A, 1/2 NPT Option: Flange
Material	Process connection: stainless steel 1.4571 Case: 1.4301 Option: Hastelloy, other materials on request
Light guide	Clad core glass Option: quartz (ML: max. 200 mm) sapphire (ML: max. 60 mm)
Mounting position	As required
Measuring accuracy	±0.5mm
Repeat accuracy	±0.1mm
Light source	IR light 930 nm
Ambient light	Max. 100 Lux
Cable gland	M20 x 1.5
Terminal connection	3 x 2.5mm 2
Ingress protection	IP66 per IEC/EN 60529

Specifications	20
Switch point ML	Standard: 35 mm, with extension 60 ...960mm
Insertion length EL	Ø18 Standard: 39 mm(ML + 7 mm)
Medium temperature	-65 ...+250 °C
Ambient temperature	-65 ...+95 °C
Pressure range	M20 x 1,5 Ø50 0 ... 500 bar
Measurement type	95 Level measurement with glass tip shapeV Option: Interface layer
Glass protection	Guard finger
Process connection	G1/2 A Option: Flange
Material	Process connection: stainless steel 1.4571 Case: 1.4301 Option: Hastelloy, other materials on request
Light guide	Clad core glass Option: quartz (ML: max. 200 mm) sapphire (ML: max. 60 mm)
Mounting position	As required
Measuring accuracy	±0.5mm
Repeat accuracy	±0.1mm
Light source	IR light 930 nm
Ambient light	Max. 100 Lux
Cable gland	M20 x 1.5
Terminal connection	3 x 2.5mm 2
Ingress protection	IP66 per IEC/EN 60529

View all (14)

Specifications

Temperature range	-269 ...+400 °C
Ambient temperature	-65 ...+95 °C

Process connection	Nominal width	Pressure rating	Sealing face
Flange EN 1092-1	DN 20 ...DN 50	PN 16 ...PN 400	B1, B2, C, D, E
Flange DIN	DN 20 ...DN 50	PN 16 ...PN 400	C, F, N
Flange ANSI	1/2" ... 2"	Class 150 ... Class 2500	RF, RTJ, FF

Specifications

Ambient temperature	-25 ...+60 °C
Power supply	AC 230 V, AC 15/120 V, AC 24 V, DC 24V
Power consumption	2.8VA,3W
Outputs	Signal relay, change-over contact, 250 V, 3 A, 100VA Failure relay, change-over contact, 250 V, 3 A, 100VA
Cable gland	-
Max. connection cross-section	2.5 mm²
Max. cable length	175 ... 600 m(with 0.5 ... 1.5 mm²)
Ingress protection	IP20 per IEC/EN 60529

Design data

Max. external inductance L max	0.5mH
Max. external capacitance C max	3 μF
U 0	≤ 9.6V
I 0	≤ 149mA
P 0	≤ 1.0W

Specifications

Ambient temperature	-40 ...+40 °C
Power supply	AC 230 V, AC 15/120 V, AC 24 V, DC 24V
Power consumption	2.8VA,3W
Outputs	Signal relay, change-over contact, 250 V, 3 A, 100VA Failure relay, change-over contact, 250 V, 3 A, 100VA
Cable gland	M16 x 1.5 / M20 x 1.5 Ex: blue
Max. connection cross-section	2.5 mm²
Max. cable length	175 ... 600 m(with 0.5 ... 1.5 mm²)
Ingress protection	IP65 per IEC/EN 60529

Version	Power supply	Model	Order number
Polycarbonate add-on case	DC 24V non-potential-free	OSA-SB	500283
AC 24V	OSA-SB	500279
AC 115/120V	OSA-SA	on request
AC 230V	OSA-SA	500275
19' plug-in card	DC 24V non-potential-free	OSA-SB	500284
AC 24V	OSA-SB	500280
AC 115/120V	OSA-SA	500278
AC 230V	OSA-SA	500277

Model	Description	Max. pressure in bar	Medium tem- perature in °C	Ambient tem- perature in °C	Item No.
OLS-H	Optoelectronic level switch, high-pressure version	176	0 ...+250	-65 ...+95	120552
OLS-H-HT = 42	Optoelectronic level switch, high-pressure version for hight temperature ML = 35	176	0 ...+350	-65 ...+95	120551
OSA-S EL	Switching amplifier 230VAC	-	-	-40 ...+40	120553
OSA-S	Switching amplifier 24VDC	-	-	-40 ...+40	120554

Specifications	SW27 ML = 35
Switch point ML	20 35mm
Insertion length EL	A 42 mm, with sieve52mm
Medium temperature	Ø18 Ø26 G 1/2 0 ...+250 °C
Ambient temperature	-65 ...+95 °C
Pressure range	0 ... 176 bar
Glass protection	Guard finger
Process connection	G1/2"
Material	Stainless steel 1.4571
Light guide	Sapphire
Mounting position	As required
Measuring accuracy	±0.5mm
Repeat accuracy	±0.1mm
Light source	IR light 930 nm
Ambient light	Max. 100 Lux
Cable gland	M20 x 1.5 / Han 7 D connector
Terminal connection	3 x 2.5mm 2
Ingress protection	IP 65
With additional glas protection	sieve

Specification: with cooling fin

Temperature range	0 ...+350 °C
Ambient temperature	-65 ...+95 °C

Specifications

Ambient temperature	-40 ...+40 °C
Power supply	AC 230VAC / 24VDC
Power consumption	2.8VA,3W
Outputs	Signal relay, change-over contact, 250 V, 3 A, 100VA Failure relay, change-over contact, 250 V, 3 A, 100VA
Cable gland	M16 x 1.5
Max. connection cross-section	2.5 mm²
Max. cable length	175 ... 600 m(with 0.5 ... 1.5 mm²)
Ingress protection	IP 65