Contrinex DW-AS-623-M18-693 Weld-Immune M18 Inductive Sensor

A coated inductive sensor made for the welding cell

The Contrinex DW-AS-623-M18-693 is the M18 member of the classic weld-immune inductive range. It combines a V2A stainless steel body with a high-performance anti-spatter coating, an 8 mm embeddable sensing distance, an M12 4-pin connector and a PNP normally open output.

Contrinex positions the series as magnetic field resistant in welding applications with high repeatability and an exceptional price-performance ratio. It is a good all-round size for fixtures, clamp feedback and part-present checks on welding lines.

Technical specifications

Selection and installation notes

The M18 body is the usual choice when the 4 mm of an M12 is too short and a full-inox sensor is not required. The datasheet gives a metal-free zone of 18 mm around the face and 60 mm in front, which matters when the sensor is flush-mounted in a steel bracket. Multiply the 8 mm by the correction factor of the target: 0.9 for copper, 1.2 for aluminum, 1.4 for brass and 0.2 for V2A stainless steel.

The maximum tightening torque is 50 Nm and repeatability is 0.4 mm. Check the supply (10 to 30 VDC), the PNP polarity of your input card and the exposure to welding current before ordering.

Other models of the weld-immune range, as listed on the Contrinex product pages:

Weld-immune range and alternatives

The coated -693 reference is the version with the anti-spatter coating, and the -673 is the uncoated equivalent. For IO-Link and IP68/IP69K protection use the full-inox 700 series pages. Browse the other inductive proximity sensors or compare with the published <a href="Turck BI5-M18 inductive sensor“>Turck BI5-M18.

How the Contrinex DW-AS-623-M18-693 works

An inductive sensor makes a high-frequency magnetic field at its sensing face. When a metal part enters the field, eddy currents form in the metal and reduce the oscillation, and the electronics switch the output. In a welding cell the strong welding currents can disturb a normal sensor. The weld-immune design is built to resist these magnetic fields. The anti-spatter coating on the stainless steel body also keeps weld spatter from sticking to the sensor.

Where the DW-AS-623-M18-693 is used

• Fixtures and clamp feedback in welding lines
• Part-present checks in welding cells
• Position checks on robot tooling
• Machines with spatter and strong magnetic fields
• Automotive body-in-white lines

Selection checklist for the DW-AS-623-M18-693

• Sensing distance of 8 mm, embeddable in metal
• Target material, with the correction factor
• PNP normally open output, and the polarity of the input card
• Supply of 10 to 30 VDC
• M12 4-pin connector and cable
• Coated version -693 or uncoated version -673
• Mounting bracket and the metal-free zone
• Ambient temperature of -25 to +70 degrees C

Installation, commissioning and maintenance notes

Screw the sensor into the bracket and tighten the nuts to no more than 50 Nm. Keep the metal-free zone around the face, because metal in this area changes the switching distance. Use the correction factor if the target is not steel. Connect the cable with the PNP output to the right input. Watch the yellow LED while moving a target into the field. Clean the spatter coating gently and check the body for damage.

Requesting a quotation for the DW-AS-623-M18-693

Please send the part reference, the quantity and the cable or connector needed. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

DW-AS-623-M18-693 target factors

The factors are 1 for steel, 0.9 for copper, 1.2 for aluminum, 1.4 for brass and 0.2 for V2A stainless steel.

DW-AS-623-M18-693 electrical data

The output current is up to 200 mA and the voltage drop is up to 2.0 VDC. The switching frequency is up to 15 Hz.

DW-AS-623-M18-693 housing

The body is V2A 1.4305 stainless steel with a PEEK sensing face. The enclosure rating is IP67 and the weight is 33.4 g.

DW-AS-623-M18-693 protections

The sensor has short-circuit and voltage reversal protection and a yellow indicator LED.

Sensor records for DW-AS-623-M18-693

Keep the position, the date of fitting and any replacement dates with the welding cell file.

Choosing the right DW-AS-623-M18-693 setting

Check the real target before fitting. The 8 mm distance applies to the standard steel target of 24 x 24 x 1 mm, and the repeat accuracy is 0.4 mm or better. Copper, aluminum and brass shorten the working distance, so leave extra margin in the fixture design.

Documents and quotation

The attached Contrinex datasheet lists every part reference of the series, correction factors, installation distances and connector pin assignment. When requesting a quotation, send the part reference, quantity, target material and mounting arrangement, and state whether a coated or uncoated version is required.