Choosing a Proximity Switch
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DC Metallic-Object Proximity Switches
Also known as inductive proximity switches, these detect metallic objects even if they’re obscured by water, oil, dirt, or a surface finish. Sensing distance is based on the target material. The distance listed is for mild steel. They’re often used with programmable logic controllers (PLCs) and produce PNP or NPN signal output. To determine the signal output of a switch you are replacing, use Testers for Proximity and Photoelectric Switches (not included).
Flush switches, also known as embeddable or shielded switches, can be mounted so that the sensor face is level with the surface of any material, including metal. They’re more accurate than projecting switches at close range and can be mounted close together without causing interference. IP67 and IP68 rated switches are protected from temporary submersion. IP69K rated switches are protected from high-pressure, high-temperature washdowns.
Also available: If you don’t see the switch you need, please select 6693T999 and specify manufacturer and manufacturer part number.
For technical drawings and 3-D models, click on a part number.
| Switch Starting Position | Dia., mm | Max. Sensing Distance, mm | Signal Output Type | Input Voltage  | Current Output | No. of Wire Leads | Lg., mm | Circuit Protection | Cable Lead Lg., ft. | Temperature Range, °F | Each | |
Stainless Steel Housing with Stainless Steel Face (IP68 and IP69K) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flush with Wire Leads | ||||||||||||
| 1 Off (Normally Open) | 18 | 5 | NPN | 10V DC-30V DC | 200mA | 3 | 50 | Overload Reverse Polarity Short Circuit | 6 1/2 | -10° to 155° | 00000000 | 0000000 |