Choosing a Proximity Switch
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About Air Preparation
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No-Air-Loss Compressed Air Drain Valves
Save energy by minimizing the loss of compressed air. Unlike other drain valves, these only open when they're full. They close before the reservoir is completely empty, so no air escapes from the system. Install them at low points in your air line after separators, dryers, filters, and aftercoolers.
Electric-powered valves have a sensor. When condensate inside the valve rises to the level of the sensor, the valve opens to drain. Valves detect when they’re blocked—they automatically open and close to attempt to remove the blockage and sound an alarm if they’re still blocked. Drain valves with a contact for remote signaling device can be wired to activate a remote alarm if blocked.
Inlet | Outlet | Overall | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Thread Type | Gender | For Tube ID | Pipe Size | Thread Type | Gender | Discharge Cap., gpm | Max. Pressure, psi | Ht. | Wd. | Dp. | Max. Temp., °F | Features | Each | |
Aluminum Housing | |||||||||||||||
Electric Powered, 120V AC—Hardwire | |||||||||||||||
| 1/2 | NPT | Female | 1/4" | __ | __ | Male | 0.2 | 230 | 2 7/8" | 4 7/8" | 3 5/8" | 120° | Alarm | 0000000 | 0000000 |
Electric Powered, 120V AC—Three-Prong Plug | |||||||||||||||
| 1/2 | NPT | Female | 3/8" | 1/4 | NPT | Male | 2.9 | 230 | 4 1/2" | 3 3/8" | 7" | 120° | Alarm, Contact for Remote Signaling Device | 0000000 | 000000 |
Valve Position Switches
These switches sense when a valve is open or closed, supporting flow and temperature control within your system. Secure the switch to your valve actuator’s mounting holes, and attach an activator (sold separately) to the actuator's shaft. As the actuator opens and closes the valve, the activator rotates until its targets align with the switch’s two inductive sensors. Once they’re aligned, your system will know that the valve is either open or closed—offering reliable feedback on your valve’s position. Connect these switches to programmable logic controllers (PLCs) to support automated processes. They meet various national and international safety standards, and they’re rated IP67 to protect against dust, washdowns, and temporary submersion.
For technical drawings and 3-D models, click on a part number.
Micro
M12 Plug
Switches with curved face minimize pinch points between the switch and activator, making them good for manually-controlled valves.
Switches with a 4-pole micro M12 plug connect to cables with a socket (sold separately), letting you quickly connect and disconnect the switch from your equipment.
To view switch wiring diagrams, select a part number and click Product Detail.
| Switch Starting Position | Switching Frequency, Hz | 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 | Environmental Rating | Each | |
With Flat Face | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
With 4-Pole Micro M12 Plug | |||||||||||||
| 2 Off (Normally Open) | 500 | 3 | PNP | 10V DC-30V DC | 100mA | __ | 36 | Reverse Polarity | __ | -10° to 155° | IP67 | 0000000 | 0000000 |
With Wire Leads | |||||||||||||
| 2 Off (Normally Open) | 500 | 3 | PNP | 10V DC-30V DC | 100mA | 4 | 36 | Reverse Polarity | 16 | -10° to 155° | IP67 | 0000000 | 000000 |
With Spring-Clamp Terminals | |||||||||||||
| 2 Off (Normally Open) | 500 | 3 | PNP | 10V DC-30V DC | 100mA | __ | 78 | Reverse Polarity | __ | -10° to 155° | IP67 | 0000000 | 000000 |
With Curved Face | |||||||||||||
With 4-Pole Micro M12 Plug | |||||||||||||
| 2 Off (Normally Open) | 500 | 3 | PNP | 10V DC-30V DC | 200mA | __ | 35 | Reverse Polarity | __ | -10° to 155° | IP67 | 0000000 | 000000 |
| 2 Off (Normally Open) | 1,000 | 4 | PNP | 10V DC-30V DC | 200mA | __ | 42 | Reverse Polarity | __ | -10° to 155° | IP67 | 0000000 | 000000 |
With Wire Leads | |||||||||||||
| 2 Off (Normally Open) | 1,000 | 4 | PNP | 10V DC-30V DC | 200mA | 4 | 42 | Reverse Polarity | 6 1/2 | -10° to 155° | IP67 | 0000000 | 000000 |
With Screw Terminals | |||||||||||||
| 2 Off (Normally Open) | 1,000 | 4 | PNP | 10V DC-30V DC | 200mA | __ | 64 | Reverse Polarity | __ | -10° to 155° | IP67 | 0000000 | 000000 |
The position of metal targets on your activator determines when your switch sends a signal to your PLC. To install, line up one of the activator's targets with one of the switch's sensors while your valve is closed. Choose an activator that prompts your desired signal.
Styles A and F prompt a signal from your sensor to your system when your valve is fully opened and closed.
Style B have a symmetrical design so you can position a switch on both sides of the activator to create redundant signals and support safety applications.
Style C prompt a signal from your sensor when your valve is not fully opened or closed—such as when your valve is in motion or stuck partially open.
Style D have customizable targets, prompting a signal when your valve reaches the position or range of motion you select.
Style E include a housing that protects the activator against debris and damage. Colored on/off indicators make readings clear from far away. Use the included captive screws for easy mounting.
Housing | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Style | For Maximum Shaft Dia., mm | For Minimum Shaft Dia., mm | For Shaft Lg., mm | Indicator Color | Dia., mm | Ht., mm | Body Material | Temperature Range, °F | Mounting Fasteners Included | Dia., mm | Ht., mm | Material | Each | |
For Switches with Flat Face | ||||||||||||||
| A | 58 | __ | 20, 30 | __ | 65 | 39 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 000000 |
| A | 90 | __ | 20, 50 | __ | 115 | 63 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| B | 58 | __ | 20, 30 | __ | 65 | 39 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| C | 58 | __ | 20, 30 | __ | 65 | 39 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| D | 53 | __ | 20 | __ | 65 | 40 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| E | 49 | __ | 20, 30 | Red, Green | 65 | 68 | Plastic | -10° to 155° | Yes | 80 | 81.6 | Plastic | 0000000 | 00000 |
| E | 49 | __ | 20, 30 | Black, Yellow | 65 | 68 | Plastic | -10° to 155° | Yes | 80 | 81.6 | Plastic | 0000000 | 00000 |
For Switches with Curved Face | ||||||||||||||
| F | __ | 34 | 20, 30, 50 | __ | 40 | 39 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| F | 34 | __ | 20 | __ | 40 | 32 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
| F | 34 | __ | 30 | __ | 40 | 43 | Plastic | -10° to 155° | Yes | __ | __ | __ | 0000000 | 00000 |
Hazardous Location Valve Position Switches
Support flow and temperature control in your system with these intrinsically safe switches, which sense when a valve is open or closed in volatile areas. Often used in chemical plants and oil and gas facilities, they are ATEX and IECEx internationally certified to protect against explosion where flammable gases and combustible dust are present.
Mount the switch to your valve actuator, and affix a corresponding activator (sold separately) onto your actuator’s shaft. As the valve opens and closes, the activator rotates until its targets align with the two inductive sensors on the switch. Once they’re aligned, your system will know that the valve is either open or closed—providing reliable feedback on your valve’s position. These switches have a 4-pole micro M12 plug to connect to NAMUR cables (sold separately), letting you quickly connect and disconnect the switch from your equipment. Connect them to programmable logic controllers (PLCs) to support automated processes. Switches meet various national and international safety standards, and they’re rated IP67 to protect against dust, washdowns, and temporary submersion.
For technical drawings and 3-D models, click on a part number.
Micro
M12 Plug
Switches with curved face minimize pinch points between the switch and activator, making them good for manually-controlled valves.
To view switch wiring diagrams, select a part number and click Product Detail.
| Switch Starting Position | Switching Frequency, kHz | Max. Sensing Distance, mm | Signal Output Type | Input Voltage | Current Output | Lg., mm | Circuit Protection | Temperature Range, °F | Environmental Rating | Each | |
With Flat Face | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
With 4-Pole Micro M12 Plug | |||||||||||
| 2 On (Normally Closed) | 3 | 3 | NAMUR | 8V DC-8.5V DC | 10mA | 36 | Reverse Polarity Short Circuit | -10° to 210° | IEC Zone 0 Groups IIC, IIB, IIA IEC Zone 2 Groups IIC, IIB, IIA IEC Zone 20 Groups IIIC, IIIB, IIIA IP67 | 0000000 | 0000000 |
With Curved Face | |||||||||||
With 4-Pole Micro M12 Plug | |||||||||||
| 2 On (Normally Closed) | 1.5 | 3 | NAMUR | 8V DC-8.5V DC | 10mA | 42 | Reverse Polarity Short Circuit | -10° to 210° | IEC Zone 0 Groups IIC, IIB, IIA IEC Zone 2 Groups IIC, IIB, IIA IEC Zone 20 Groups IIIC, IIIB, IIIA IP67 | 0000000 | 000000 |
The position of metal targets on your activator determines when your switch sends a signal to your PLC. To install, line up one of the activator's targets with one of the switch's sensors while your valve is closed. Choose an activator that prompts your desired signal.
Styles A and F prompt a signal from your sensor to your system when your valve is fully opened and closed.
Style B have a symmetrical design so you can position a switch on both sides of the activator to create redundant signals and support safety applications.
Style C prompt a signal from your sensor when your valve is not fully opened or closed—such as when your valve is in motion or stuck partially open.
Style D have customizable targets, prompting a signal when your valve reaches the position or range of motion you select.
| Style | For Maximum Shaft Dia., mm | For Minimum Shaft Dia., mm | For Shaft Lg., mm | Dia., mm | Ht., mm | Body Material | Temperature Range, °F | Mounting Fasteners Included | Each | |
For Switches with Flat Face | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| A | 58 | __ | 20, 30 | 65 | 39 | Plastic | -10° to 155° | Yes | 0000000 | 000000 |
| A | 90 | __ | 20, 50 | 115 | 63 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
| B | 58 | __ | 20, 30 | 65 | 39 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
| C | 58 | __ | 20, 30 | 65 | 39 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
| D | 53 | __ | 20 | 65 | 40 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
For Switches with Curved Face | ||||||||||
| F | __ | 34 | 20, 30, 50 | 40 | 39 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
| F | 34 | __ | 20 | 40 | 32 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |
| F | 34 | __ | 30 | 40 | 43 | Plastic | -10° to 155° | Yes | 0000000 | 00000 |