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
Type OPG02
Type OPG04
Type OPG05
Type OPG061
Type ELS-950
Type ELS-1100
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 |
Current output | max. 40 mA |
Output | DC PNP (200 mA), reverse polarity protected |
Function | Opener / Closer |
Switch point number | 1 |
Enclosure | IP65 |
Cable | PVC-, 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 |
Connecting Housing | stainless steel 1.4305, optional also in stainless steel 1.4571 |
Accuracy | +/- 0.5 mm |
min. distance sensor tip to reflecting wall | 10 mm |
Material prism | quartz glass |
Mountig direction | any |
Process connections | BSPP 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 to 32 V DC |
Current output | 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 |
Connecting Housing | Stainless steel 1.4571 |
Accuracy | +/- 0.5 mm |
min. distance sensor tip to reflecting wall | 10 mm |
Material prism | quartz glass |
Mountig direction | any |
Process connections | BSPP 1/2″, 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 |
Current output | 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 |
Cable | PVC-, 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 |
Connecting Housing | steel, nickel-plated |
Accuracy | +/- 0.5 mm |
min. distance sensor tip to reflecting wall | 10 mm |
Material prism | glass, fused in the steel body (without seal) |
Mountig direction | any |
Process connections | BSPP 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 |
Current output | 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 |
Cable | PVC-, 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 |
Connecting Housing | steel, nickel-plated |
Accuracy | +/- 0.5 mm |
min. distance sensor tip to reflecting wall | min. 10 mm |
Material prism | quartz glass |
Mountig direction | any |
Process connections | BSPP 1/2″, other types on request |
Type OPG061
Optical level limit switch made of stainless steel 1.4404 for high temperatures.
Supply voltage | 12 to 32 V DC |
Current output | 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 +175°C |
Ambient temperature | -30 to +80°C |
Connecting Housing | parts in contact with media made of 1.4571 |
Accuracy | +/- 0.5 mm |
min. distance sensor tip to reflecting wall | 10 mm |
Material prism | quartz glass |
Mountig 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 prism | Polysulphone |
O-Ring | Fluorocarbon |
Pressure | max. 17 bar |
Medium temperature | -40°C to +110°C |
Current consumption | 4 mA at 5 VDC, 10 mA at 12 VDC |
Output | max. 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 prism | Polysulfone or Nylon |
Pressure | Max. 10 bar |
Media temperature | -18°C to +80°C |
Current consumption | ca. 18 mA |
Output | TTL/CMOS Compatible. Open Collector Output May Sink 40 mA UP TO 30 VDC. |
Repeatability | 1 mm |
