When you're shopping for sensors, encoders, and machine safety parts, the first fork in the road is often whether you need to guard a physical edge or monitor a machine's stopping motion. The Industrial Safety Edge Sensor Strip Contact Ribbon Switch fos Bus and the Prewired Stop Motion Detector Safety Machine 4 Way Interlock Release See Info sit on opposite sides of that fork. One is a contact ribbon switch for edge sensing; the other is a stop-motion detector with a 4-way interlock release. The price spread between them is $188.51, from $29.96 to $218.47. For simplicity, we'll call them the edge strip and the prewired detector.
Quick verdict
Choose the edge strip if your project is about protecting an edge, especially when you need a linear sensing surface. Choose the prewired detector if you need a stopping monitor and you're comfortable with a used unit. Both solve different machine safety problems.
At a glance
| Product | Price | Price bar | Condition |
|---|---|---|---|
| Industrial Safety Edge Sensor Strip Contact Ribbon Switch fos Bus | $29.96 | New other (see details) | |
| Prewired Stop Motion Detector Safety Machine 4 Way Interlock Release See Info | $218.47 | Used |
Where each product wins
The edge strip wins for edge pressure sensing and linear coverage. The prewired detector wins when you need a ready-to-connect unit that confirms a stop has occurred. The edge strip is the simpler choice when your concern is physical contact along a guarded edge. The prewired detector is the better match when you need to confirm that movement has stopped before a release.
Product notes
Industrial Safety Edge Sensor Strip Contact Ribbon Switch fos Bus
The contact ribbon switch design gives this unit a clear purpose: it senses pressure along an edge, making it a natural fit for guard and door edge protection. As a strip, it can cover a long span in a single run, which is helpful for machines with wide access points. Because it's a ribbon-style contact switch, the sensing area runs along the strip rather than at a single point. The condition is "new other (see details)," which is a bit less straightforward than a standard new part. That said, if you need an edge-sensing solution and not a stopping monitor, this strip is a practical option.
Prewired Stop Motion Detector Safety Machine 4 Way Interlock Release See Info
This unit is aimed at stop-motion detection with a 4-way interlock release, and it comes prewired, which simplifies the wiring step. It's a used Allen Bradley component made in the United States. At 25 inches wide and 8 inches high, it has a substantial footprint, so it's worth planning around. The main draws are the interlock release and the prewired design. The used condition is the main limitation; for a machine safety component, that's a detail to weigh carefully. If you need the specific stop-motion and interlock function, this is the one to choose.
Final choice by use case
If you're guarding a press, door, or moving panel, the edge strip is the direct match. If you're wiring a machine stop circuit, the prewired detector is the one. For a machine with a single guarded edge, the strip is enough. For a machine that must verify a stop before allowing access, the detector is necessary. The strip fits wide-area edge sensing; the detector fits a specific stop-release application. Think about the machine cycle: the detector monitors movement, while an edge sensor strip responds to contact pressure.
