Ex sensors

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46B Ex, 55 Ex and 96 Ex series

The product line of the series encompasses all known operating principles such as throughbeam photoelectric sensor, retro-reflective photoelectric sensor or diffuse reflection scanner with background suppression.

The sensors are accommodated inside a metal casing for protection against mechanical damage. This ensures that even the highest requirements with respect to shock resistance of the housing are safely ensured. These sensors can be used in potentially explosive areas with these classification requirements (see table)

Equipment groupDevice categoryEquipment protection levelZoneSub-group
II3GGc2IIB
II3DDc22IIIC
The ex protection marking of the devices. The devices also meet the special demands on equipment which work with optical radiation in potentially explosive areas (EN 60079-28). The ex protection marking of the devices. The devices also meet the special demands on equipment which work with optical radiation in potentially explosive areas (EN 60079-28).
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Intrinsically safe sensors of the 92 Ex series

The sensors of the 92 Ex series are designed as throughbeam photoelectric sensor, retro-reflective photoelectric sensor and as diffuse reflection light scanner and reliably detect objects at distances from 300 mm to 12 m. In doing so, the intrinsically safe ATEX sensors reliably transmit the switching signals to the VS 403 isolated switching amplifiers with the aid of the NAMUR interface. Sensors of this series may be used in zones 1 and 2 in areas with potentially explosive gases and dusts.

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VS 403 isolated switching amplifier with intrinsically safe supply circuit

The VS 403 isolating switching amplifier makes it possible to effect an intrinsically safe circuit for the sensors of the 92 series. The sensors are supplied with power and the switching signals communicated by way of the NAMUR interface. This isolating switching amplifier, which is certified in keeping with the most recent ATEX directives, is available either with a 24 V power supply and relay/transistor output, or with an AC power supply of 110 to 240 V and relay output.

For setting up the intrinsically safe circuit, Leuze electronic also offers blue cables with M12 circular plugs to connect the sensor to the isolating switching amplifier.

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Special accessories for devices with explosion-proof design:

  • Interlock guard K-V M12-Ex, 50109217 (prevents unintended disconnection of connectors)
  • Cable for the connection of intrinsically safe sensors
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RFM 32 Ex IDent system - transponder reader for Ex zone 2

Identification is also an issue in Ex applications.

Systems often have a mixed design, i.e. some sections are subject to explosion hazards, others are not. Available especially for surface-treatment applications (immersion baths, varnishing machines, drying etc.) as an extension of our RFID devices for Ex zone 2 (ATEX) is the RFM 32 SL 200 Exn device with long cable (10m).

The function scope corresponds to that of the "standard device" RFM 32 SL 200 (range up to max. 110mm). Depending on the application, several other transponders with ATEX approval (zone 2) are available for selection in addition to our standard selection of transponders.

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Distance sensors of the ODSL 96B Ex and 30/V-30M Ex d series

The ODSL 96B Ex d and ODSL 30/V-30M Ex d series distance sensors detect objects located in the light beam or which move through the light beam and measure the distance to these objects without making contact. The sensors have a pressure-resistant, encapsulated housing and can be used in potentially explosive areas with those classification requirements (see table):

TypeEquipment groupDevice categoryEquipment protection levelZoneSub-group
ODSL 96B Ex dII2GGb1IIB + H2
II2DDb21
ODSL 30 Ex dII2GGb1IIA
II2DDb21
The ex protection marking of the devices. The devices also meet the special demands on equipment which work with optical radiation in potentially explosive areas (EN 60079-28). The ex protection marking of the devices. The devices also meet the special demands on equipment which work with optical radiation in potentially explosive areas (EN 60079-28).
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Light curtains

Measuring light curtain CML 720i Ex
Our Ex-protected measuring light curtains are available standard with a beam spacing of 10mm and with a measurement field length of 140 to 2860mm or with a beam spacing of 20mm and a measurement field length of 130 to max. 2850mm. The devices can be used without additional protective measures in potentially explosive areas with these classification requirements (see table)

Safety light curtain MLC 520 Ex
The safety light curtains of the MLC 520 Ex series are optoelectronic protective devices and satisfy these safety requirements:

MLC 520 Ex
Type in accordance with EN IEC 614964
Category in accordance with EN ISO 138494
Performance Level (PL) in accordance with EN ISO 13849‑1e
Safety Integrity Level (SIL) in accordance with IEC 61508 and SILCL in accordance with EN IEC 620613

The devices can be used without additional protective measures in potentially explosive areas with these classification requirements (see table).

TypeEquipment groupDevice categoryEquipment protection levelZoneSub-group
CML 720i ExII3GGc2IIB
II3DDc22IIIB
MLC 520 ExII3GGc2IIB
II3DDc22IIIB