Optoelectronic Level Sensors

These robust and highly reliable level sensors use the optical principle. The opto-electronic sensor contains an infrared LED and a light receiver. If the liquid level rises in the container and surrounds the tip, the light beam is interrupted by the liquid and no longer reaches the receiver, or only reaches it weakly, causing the latter to react to the change and to initiate a switching operation.

Used in plant engineering and the chemical and pharmaceutical industry, as well as in mechanical engineering, hydraulics and water technology for liquids such as oils, water, distilled water, aqueous media, as well as for foam detection.


Type OPG01

Limit value switch made from stainless steel with a glass tip, cable or plug output, for detecting limit levels of liquid media.

Supply voltage 12 to 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200 mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Enclosure IP65
CablePVC-, PUR, 3 x 0,25 mm² or Plug M8, other types on request
Pressure max. 10 bar
Media temperature -30 to +100°C
Ambient temperature -25 to +70°C
Housing stainless steel 1.4305, optional also in stainless steel 1.4571
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wall10 mm
Material prismquartz glass
Mounting direction any
Process connectionsBSPP 3/8", M12x1, BSPP 1/2" other types on request
 
 

Type OPG02

Optical level limit switch made from stainless steel with variable length.

Supply voltage 12 - 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200 mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Enclosure IP65
Cable PVC-, PUR-cable 3 x 0,25, mm², Couplar plug or Plug M12,
other types on request
Pressure max. 25 bar
Media temperature -30 to +100°C
Ambient temperature -25 to +70°C
Housing stainless steel 1.4571
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wallmin. 10 mm
Material prismquartz glass
Mounting direction any
Process connectionsBSPP 1/2", other types on request
Sensor length min. 65 mm, max. 3000 mm
 
 

Type OPG03

Optical level limit switch made from stainless steel with relay output.

Supply voltage 230VAC
Output 250V AC/6A, Relais
Function Change-over
Switch point number 1
Enclosure IP65
Electrical connectionAluminum Housing 75 x 80 x 57 mm,
other types on request
Pressure max. 25 bar
Media temperature -30 to +100°C
Ambient temperature -30 to +70°C
Tube13 mm, made of 1.4571
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wallmin. 10 mm
Material prismquartz glass
Mounting direction any
Process connectionsBSPP 1/2" (1.4571), other types on request
Sensor length min. 65 mm, max. 3000 mm
 
 

Type OPG04

Optical level limit switch made from nickel-plated steel for refrigeration technology.

Supply voltage 12 to 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200 mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Indication of active output 1 LED
Enclosure IP65
CablePVC-, PUR, 3 x 0,25 mm² or Plug M8, other types on request
Pressure max. 40 bar, optional also higher pressure
Media temperature -30 to +70°C
Ambient temperature -40 to +100°C
Housing steel, nickel-plated
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wallmin. 10 mm
Material prismglass, fused in the steel body (without seal)
Mounting direction any
Process connectionsBSPP 1/2", 1/2" NPT, other types on request
 
 

Type OPG05

Optical level limit switch made from stainless steel for high temperatures.

Supply voltage 12 to 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200 mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Indication of active output 1 LED
Enclosure IP65
CablePVC-, PUR-cable 3 x 0,25 mm², Couplar plug or Plug M12,
other types on request
Pressure max. 25 bar
Media temperature -40 to +170°C
Ambient temperature -30 to +80°C
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wallmin. 10 mm
Material prismquartz glass
Mounting direction any
Process connectionsBSPP 1/2", other types on request
 
 

Type OPG06

Optical level limit switch made from 1.4404 stainless steel with clamp process connection.

Supply voltage 12 to 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Enclosure IP65
CablePVC-, PUR-cable 3 x 0,25 mm², Couplar plug or Plug M12,
other types on request
Pressure max. 25 bar
Media temperature -30 to +100°C
Ambient temperature -25 to +70°C
Housing1.4404
Accuracy +/- 0.5 mm
min. distance sensor tip to
reflecting wall
min. 10 mm
Material prismquartz glass
Mounting direction any
Process connection Clamp, other types on request
 
 

Type OPG061

Optical level limit switch made from 1.4404 stainless steel for high temperatures.

Supply voltage 12 to 32 V DC
Supply current max. max. 40 mA
Output DC PNP (200 mA), reverse polarity protected
Function Opener / Closer
Switch point number 1
Enclosure IP65
CablePVC-, PUR-cable 3 x 0,25 mm², Couplar plug or Plug M12,
other types on request
Pressure max. 25 bar
Media temperature -30 to +175°C
Ambient temperature -30 to +80°C
Housingparts contacting the medium: 1.4571
Accuracy +/- 0.5 mm
min. distance sensor tip to reflecting wallmin. 10 mm
Material prismquartz glass
Mounting direction any
Process connection Clamp, other types on request
 
 

Type ELS-950

The smallest optoelectronic switch made from polysulphone with high temperature tolerance. Extremely price-effective, and is thereby particularly recommended for OEM applications with limited space and large quantities.

Housing and prismPolysulphone
O-ringFluorocarbon
Pressuremax. 17 bar
Medium temperature-40 to +110 °C
Current consumption4 mA at 5 VDC, 10 mA at 12 VDC
Outputmax. current consumption 40 mA at 30 VDC
Repeatability ±1 mm
 
 

Type ELS-1100

Compact and economical optoelectronic switch made from polysulphone or nylon for point measurements in most liquids that do not crystallize and form deposits. Solid-state technology means reliable switching behaviourt and a long service life. Not suitable for use in freezing media, and the repeatability of the measurements amounts to +/- 1 mm.

Housing and Material prismPolysulfone or Nylon
Pressuremax. 10 bar
Media temperature-18 to +80°C
Current consumption ca. 18 mA
OutputTTL/CMOS Compatible. Open Collector Output May Sink 40 mA UP TO 30 VDC.
Repeatability1 mm
 
 
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