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.
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 | |
White Bronze-Plated Brass Housing with Plastic Face (IP68) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flush with Wire Leads | ||||||||||||
| 1 On (Normally Closed) | 12 | 4 | PNP | 5V DC-36V DC | 200mA | 3 | 33.2 | Reverse Polarity Short Circuit | 6 1/2 | -40° to 185° | 00000000 | 000000 |
AC/DC Metallic-Object Proximity Switches
These switches accept both AC and DC input. Also known as inductive proximity switches, they remotely sense metallic objects even if they’re obscured by water, oil, dirt, or a surface finish. Sensing distance is based on the type of material being sensed. The distance listed is for mild steel. All are rated IP67 or IP68 for protection from temporary submersion.
Projecting switches, also known as non-embeddable or unshielded switches, must be mounted with the area around the sensor face free of metal. They have a longer sensing distance than flush switches with the same diameter.
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 | Input Voltage | Current Output | No. of Wire Leads | Lg., mm | Features | Cable Lead Lg., ft. | Temp. Range, °F | Environmental Rating | Each | |
Nickel-Plated Brass Housing with Plastic Face | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Projecting with Wire Leads | ||||||||||||
| 1 On (Normally Closed) | 12 | 4 | 20V AC-265V AC/20V DC-320V DC | 200mA | 2 | 62 | LED Power Indicator | 6 1/2 | -10° to 185° | IP67 | 0000000 | 0000000 |