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 | |
Nickel-Plated Brass Housing with Plastic Face (IP67) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Flush with Wire Leads | ||||||||||||
| 1 Off (Normally Open) and 1 On (Normally Closed) | 18 | 8 | PNP | 10V DC-30V DC | 200mA | 4 | 60.5 | Overload Reverse Polarity Short Circuit | 6 1/2 | -10° to 155° | 00000000 | 000000 |
DC Metallic-Object Proximity Switches for Long Distances
Sense objects from farther away than with other proximity switches that have the same diameter. 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. They’re often used with programmable logic controllers (PLCs) and produce PNP signal output. Some automatically sense whether PNP or NPN signal output is needed.
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.
All are rated IP69K for protection from high-temperature, high-pressure washdowns. Some are also rated NEMA 6P, 13, and IP67 for protection from corrosion, oil/coolant spraying, and 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 | Max. Sensing Distance, mm | Dia., mm | Signal Output Type | Input Voltage | No. of Wire Leads | Lg., mm | Cable Lead Lg., ft. | Temperature Range, °F | Environmental Rating | Each | |
Stainless Steel Housing with Plastic Face | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Flush with Wire Leads | |||||||||||
| 1 Off (Normally Open) | 8 | 18 | PNP/NPN | 6V DC-48V DC | 3 | 66 | 6 1/2 | -40° to 155° | NEMA 6P, NEMA 13, IP67, IP69K | 0000000 | 0000000 |