Product details
SME-8-K-LED-230 Proximity Sensor – Reliable Reed Switch for T-Slot Actuators
The FESTO SME-8-K-LED-230 is a magnetic reed proximity sensor built for T-slot cylinders. Moreover, it delivers precise position sensing in harsh industrial settings. With a wide voltage range and durable IP68 housing, it suits both AC and DC control systems. In addition, the sensor comes with a 2.5 m cable and a bright yellow LED for easy status checks.
Technical Specifications
- Brand: FESTO
- Model: SME-8-K-LED-230
- Series: SME-8
- Module Type: Proximity Sensor
- Measuring Principle: Reed magnetic
- Measuring Range: Position sensing in T-slot
- Frequency Response: Max. 500 Hz switching frequency
- Sensitivity: Reproducibility of switching value ±0.1 mm
- Linearity: Not applicable (contact-based)
- Resolution: 0.2 mm repetition accuracy
- Temperature Range: -30 °C to 60 °C (ambient)
- Environmental Resistance: IP68, free of copper and PTFE, RoHS compliant
- Interference Immunity: Surge strength 4 kV, insulation voltage 2500 V
- Operating Voltage: 3 V to 230 V AC/DC
- Output Current: Max. 120 mA
- Switching Element: Normally open contact, bipolar
- Electrical Connection: 2-wire cable, open end, axial exit
- Cable Length: 2.5 m, TPE-U(PUR) sheath, grey
- Mounting: Clamped in T-slot, insertable lengthwise
- Tightening Torque: 0.2 Nm
- Housing Material: Epoxy resin, PET, high alloy steel
- Weight: 39 g
- Status Display: Yellow LED
- Protection Class: IP68
- Certifications: CCC, RCM, CE (EMC, Low Voltage), UKCA, RoHS
Installation Guide
- First, insert the sensor into the T-slot lengthwise.
- Then clamp it securely with a tightening torque of 0.2 Nm.
- After that, mount it in any position.
- Also, keep cable installation flexible within -5 °C to 60 °C.
- Next, connect the 2-wire open end to your control circuit.
- Finally, check the yellow LED for switching status.
Commissioning and Maintenance Convenience
- Because there is no polarity protection, verify wiring before power-up.
- However, short circuit strength and overload protection are not available.
- Therefore, use an inductive protective circuit adapted to MZ, MY, ME coils.
- Also, the minimum load current is 5 mA.
- Moreover, the sensor needs no calibration after mounting.
- Additionally, clean the T-slot before insertion to avoid debris.
Compatibility Notes
- Firstly, it fits all standard T-slot actuators.
- Secondly, it works with both AC and DC power supplies.
- Thirdly, it is compatible with MZ, MY, and ME coil protection circuits.
- Furthermore, it conforms to EN 60947-5-2.
- Besides that, it is free of copper and PTFE, so it is safe for sensitive environments.
- Lastly, it is RoHS compliant for global use.
Certifications
- CCC authorisation
- RCM Mark
- CE mark (EMC and Low Voltage Directives)
- UKCA marking (UK RoHS and electrical equipment regulations)
- LABS (PWIS) conformity: VDMA24364-B2-L
- Pollution degree 3
Package Contents
- 1 x FESTO SME-8-K-LED-230 proximity sensor
- 2.5 m cable attached
- Mounting instructions (support / actuator-sensor overview)
Warranty and Shipping
- Warranty: 12 months
- Dispatch: 12 to 24 hours
- Courier: FedEx, UPS, DHL
- Contact: sales@powergearx.com
- WhatsApp: +86 18030005825
Expert Review
The SME-8-K-LED-230 stands out for its robust reed contact design. For example, it handles 230 V AC/DC directly, so you can skip external relays. In addition, the IP68 rating and wide temperature range make it a solid choice for harsh factory floors. Furthermore, the yellow LED saves time during troubleshooting. However, note the lack of short circuit and overload protection. Therefore, always pair it with a suitable protective circuit for inductive loads. Also, the 0.03 ms switch-off time is extremely fast for a reed sensor. Consequently, this model fits well in pneumatic and hydraulic actuators where space is tight.
Manager’s Insight
This sensor reduces wiring complexity because it works with both AC and DC. Moreover, the 2-wire design keeps installation simple. In addition, the 39 g weight and compact T-slot clamp mean less stress on moving parts. For high-vibration applications, the 4 kV surge strength and 2500 V insulation voltage provide extra safety. However, the only trade-off is the minimum load current of 5 mA. Therefore, if your PLC input draws less, add a bleeder resistor. Overall, the SME-8 series is a proven workhorse for position feedback in automation.
Best Suited Devices and Applications
- Pneumatic cylinders with T-slot profiles
- Hydraulic actuators
- Valve manifolds
- Packaging machinery
- Assembly lines
- Material handling systems
- Food and beverage equipment (copper-free)
- Outdoor or washdown areas (IP68)
FAQ
Q: Does this sensor work with both AC and DC power?
A: Yes. The operating voltage range is 3 V to 230 V AC/DC. Therefore, you can connect it directly to either supply.
Q: What is the maximum switching frequency?
A: It reaches 500 Hz. In addition, that is fast enough for most position sensing tasks.
Q: Can I use this sensor without a protective circuit?
A: No. For inductive loads, always add an inductive protective circuit. Moreover, the sensor has no built-in overload or short circuit protection.
Q: How do I know the sensor is switched on?
A: A yellow LED lights up when the contact closes. Consequently, you can see it from a distance.
Q: What is the minimum load current?
A: 5 mA. However, if your input draws less, the sensor may not trigger reliably. Therefore, add a resistor if needed.
Q: Is the cable flexible at low temperatures?
A: The cable works from -5 °C to 60 °C when moving. In contrast, for fixed installation, the range is -30 °C to 60 °C.
Q: What does the IP68 rating mean here?
A: It means full dust protection and resistance to continuous water immersion. As a result, the sensor survives washdown and outdoor use.
Q: How fast is the switch-off time?
A: 0.03 ms. Furthermore, that is very fast for a reed contact. It helps with high-speed counting.
Q: Do I need to buy a separate mounting bracket?
A: No. The sensor clamps directly into a standard T-slot. Therefore, you only need a 0.2 Nm torque tool.
Q: Can I use this sensor in food processing?
A: Yes. It is free of copper and PTFE. In addition, it conforms to RoHS. That makes it safe for food contact zones.
Q: What certifications does it hold?
A: CCC, RCM, CE (EMC and Low Voltage), UKCA, and RoHS. Moreover, it meets LABS (PWIS) conformity.
Q: How long is the warranty?
A: 12 months from the date of purchase.
Q: How fast do you ship?
A: We dispatch within 12 to 24 hours. In addition, we use FedEx, UPS, or DHL.
Buying Guide
- First, check your cylinder slot profile. This sensor fits standard T-slots.
- Then confirm your voltage. The 3–230 V AC/DC range covers most control systems.
- Next, measure your minimum load current. It must be at least 5 mA.
- Also, add an inductive protective circuit if you switch coils.
- Moreover, choose this model for IP68 and a wide temperature range.
- Furthermore, for high-vibration areas, the 4 kV surge strength adds safety.
- Finally, buy with confidence. 12-month warranty and fast dispatch.
- Questions? Email sales@powergearx.com or message us on WhatsApp.
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