Autonics PRD Series Cylindrical Inductive Proximity Long- distance Sensor Switch(DC-2-Wire-Type)
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2025/7/4 Update
Autonics PRD Series Cylindrical Inductive Proximity Long- distance Sensor Switch(DC-2-Wire-Type)
— Offer multiple installation types, detection diameters, and distances. They ensure stable operation, with certifications, and come in various wire types and connection specifications.
— Offer multiple installation types, detection diameters, and distances. They ensure stable operation, with certifications, and come in various wire types and connection specifications.
Autonics PRD Series Cylindrical Inductive Proximity Long- distance Sensor Switch(DC-2-Wire-Type)
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Technical Features
Products Specifications
| Mounting type: | Flush type | Flush type | Flush type | Flush type |
|---|---|---|---|---|
| Standard type | PRD☐T08-2☐ | PRD☐T12-4☐ | PRD☐T18-7☐ | PRD☐T30-15☐ |
| Splash-proof type | PRDA☐T12-4☐ | PRDA☐T18-7☐ | PRDA☐T30-15☐ | |
| Sensing side diameter | Ø 8 mm | Ø 12 mm | Ø 18 mm | Ø 30 mm |
| Sensing distance | 2 mm | 4 mm | 7 mm | 15 mm |
| Setting distance | 0 ~ 1.4 mm | 0 ~ 2.8 mm | 0 ~ 4.9 mm | 0 ~ 10.5 mm |
| Hysteresis | ≤ 15% of sensing distance | ≤ 10% of sensing distance | ||
| Standard sensing target: Iron | 8 × 8 × 1 mm | 12 × 12 × 1 mm | 20 × 20 × 1 mm | 45 × 45 × 1 mm |
| Response frequency 01) | 1 kHz | 450 Hz | 250 Hz | 100 Hz |
| Influence of temperature | Within ±10% of sensing distance at 20°C ambient temperature (Sensing side Ø 8mm: ≤± 15%) | |||
| Indicator | Operation indicator (red) | |||
| Approvals |  | | | |
| Mounting type: | Non-flush type | Non-flush type | Non-flush type | Non-flush type |
|---|---|---|---|---|
| Standard type | PRD☐T08-4☐ | PRD☐T12-8☐ | PRD☐T18-14☐ | PRD☐T30-25☐ |
| Sensing side diameter | Ø 8 mm | Ø 12 mm | Ø 18 mm | Ø 30 mm |
| Sensing distance | 4 mm | 8 mm | 14 mm | 25 mm |
| Setting distance | 0 ~ 2.8 mm | 0 ~ 5.6 mm | 0 ~ 9.8 mm | 0 ~ 17.5 mm |
| Hysteresis | ≤ 15% of sensing distance | ≤ 10% of sensing distance | ||
| Standard sensing target: Iron | 12 × 12 × 1 mm | 25 × 25 × 1 mm | 40 × 40 × 1 mm | 75 × 75 × 1 mm |
| Response frequency 01) | 800 Hz | 400 Hz | 200 Hz | 100 Hz |
| Influence of temperature | Within ±10% of sensing distance at 20°C ambient temperature (Sensing side Ø 8mm: ≤± 15%) | |||
| Indicator | Operation indicator (red) | |||
| Approvals | | | | |
- The response frequency is an average value. The measurement conditions are: using the standard sensing target, the distance to the target is twice the size of the standard sensing target, and the setting distance is 1/2 of the sensing distance.
| Body weight (packaging) 01) | Ø 8 mm | Ø 12 mm | Ø 18 mm | Ø 30 mm | |
|---|---|---|---|---|---|
| Cable outgoing type | Normal | ≈ 43 g (≈ 63 g) | ≈ 62 g (≈ 74 g) | ≈ 97 g (≈ 115 g) | ≈ 143 g (≈ 180 g) |
| Normal | – | ≈ 72 g (≈ 84 g) | ≈ 122 g (≈ 134 g) | ≈ 221 g (≈ 184 g) | |
| Long | – | ≈ 82 g (≈ 94 g) | ≈ 127 g (≈ 145 g) | ≈ 183 g (≈ 220 g) | |
| Cable outgoing connector type | Normal | ≈ 25 g (≈ 45 g) | ≈ 32 g (≈ 55 g) | ≈ 62 g (≈ 80 g) | ≈ 130 g (≈ 145 g) |
| Normal | – | ≈ 42 g (≈ 54 g) | ≈ 65 g (≈ 77 g) | ≈ 143 g (≈ 155 g) | |
| Long | – | – | ≈ 92 g (≈ 110 g) | – | |
| Connector type | Normal | ≈ 10 g (≈ 32 g) | ≈ 20g (≈ 50 g) | ≈ 42 g (≈ 60 g) | ≈ 110 g (≈ 150 g) |
| Normal | – | ≈ 26g (≈ 38 g) | ≈ 49g (≈ 61 g) | ≈ 134 g (≈ 146 g) | |
| Long | – | – | ≈ 60 g (≈ 78 g) | ≈ 150 g (≈ 190 g) | |
- 01) When the body length is standard type, it is listed in the format [Standard type / Splash-proof type]. The long type is only applicable to the standard type.
| Property | Specification |
|---|---|
| Power supply voltage | 12-24 VDC (ripple P-P: ≤ 10%), Operating voltage range: 10-30 VDC |
| Source current | Sensing face Ø 8 mm: ≤ 0.8 mA Sensing face Ø 12 mm, Ø 18 mm, Ø 30 mm: ≤ 0.6 mA |
| Control output | 2 ~ 100 mA |
| Residual voltage 01) | ≤ 3.5 V (Non-polarity: ≤ 5 V) |
| Protection circuit | Surge protection circuit, output short-circuit overcurrent protection circuit, power supply reverse polarity protection circuit |
| Insulation resistance | ≥ 50 MΩ (500 VDC megger) |
| Dielectric strength | Sensing face Ø 8 mm : 1,000 VAC~ 50/60 Hz for 1 minute (between all terminals and housing) (Plug-in type: 1,500 VAC~ 50/60 Hz for 1 minute (between all terminals and housing)) |
| Sensing face Ø 12 mm, Ø 18 mm, Ø 30 mm : 1,500 VAC~ 50/60 Hz for 1 minute (between all terminals and housing) | |
| Vibration resistance | 10 ~ 55 Hz (1-minute period) amplitude 1mm, 2 hours in each X, Y, Z direction |
| Shock resistance | 500 m/s² (≈ 50 G), 3 times in each X, Y, Z direction |
| Operating ambient temperature | -25 ~ 70 °C, During storage: -30 ~ 80 °C (no freezing, no condensation) |
| Operating ambient humidity | 35 ~ 95 %RH, During storage: 35 ~ 95 %RH (no freezing, no condensation) |
| Protection class | IP67 (IEC standard) |
| Connection method | Cable type / Cable with plug type / Plug-in type |
| Cable specification 02) | Sensing face Ø 8 mm: Ø 3.5 mm, 2-core Sensing face Ø 12 mm: Ø 4 mm, 2-core Sensing face Ø 18 mm, Ø 30 mm: Ø 5 mm, 2-core |
| Core wire specification | Ø 3.5 mm cable: AWG 24 (0.08 mm, 40 cores), insulation O.D.: Ø 1 mm Ø 4 mm, Ø 5 mm cable: AWG 22 (0.08 mm, 60 cores), insulation O.D.: Ø 1.25 mm |
| Connector specification | M12 Connector |
| Material | Standard type cable (black): PVC Oil-resistant reinforced cable (gray): Oil-resistant reinforced PVC |
| General type | Housing/Nut: Nickel-plated brass (Sensing face Ø 8 mm plug-in type housing: SUS303), Gasket: Nickel-plated iron, Sensing face: PBT |
| Spatter-resistant type | Housing/Nut: Brass (PTFE non-stick coating), Gasket: Iron (PTFE non-stick coating), Sensing face: PTFE |
- Please be sure to confirm the conditions between the connected machines.
- Cable type: 2m, Cable with plug type: 300mm
Setting Distance Calculation Formula
The shape, size, and material of the sensing object all affect the sensing distance. For stable detection, please install within 70% of the sensing dzistance.
Influence of Mutual Interference and Surrounding Metal
■ Mutual Interference
As shown in the figure below, when two or more proximity switches are installed face-to-face or side-by-side, malfunctions may occur due to frequency interference. The installation spacing must meet the requirements of the table below.
■ Influence of Surrounding Metal
If metal is present around the proximity switch, it may cause malfunctions such as poor resetting. To prevent malfunctions, the installation spacing must meet the requirements of the table below.
(Unit: mm)
| Sensing face —- Item | Ø 8 mm | Ø 12 mm | Ø 18 mm | Ø 30 mm | ||||
|---|---|---|---|---|---|---|---|---|
| Flush type | Non-flush type | Flush type | Non-flush type | Flush type | Non-flush type | Flush type | Non-flush type | |
| A | 20 | 80 | 25 | 120 | 50 | 200 | 110 | 350 |
| B | 15 | 60 | 25 | 100 | 35 | 110 | 90 | 300 |
| l | 0 | 12 | 2.5 | 15 | 3.5 | 14 | 6 | 20 |
| Ød | 8 | 24 | 18 | 40 | 27 | 70 | 45 | 120 |
| m | 6 | 8 | 12 | 20 | 24 | 40 | 45 | 90 |
| n | 12 | 24 | 18 | 40 | 27 | 70 | 45 | 120 |
Allowable Installation Torque
When tightening the nut, please use the provided washer. The allowable nut torque is the value when using the attached washer and inserting as shown in the figure below.
| Sensing side —– Strength | Ø 8 mm | Ø 12 mm | Ø 18 mm | Ø 30 mm | ||||
|---|---|---|---|---|---|---|---|---|
| Flush type | Non-flush type | Flush type | Non-flush type | Flush type | Non-flush type | Flush type | Non-flush type | |
| Front part dimension | 7 mm | 5 mm | 13 mm | 7 mm | – | – | 26 mm | 12 mm |
| Front part torque | 3.92 N·m | 6.37 N·m | 14.7 N·m | 49 N·m | ||||
| Rear part torque | 8.82 N·m | 11.76 N·m | 14.7 N·m | 78.4 N·m | ||||
Safety Precautions/Precautions for Use/Installation Precautions
