Clear-on-clear label applicators
Detects a transparent label on a transparent liner, which no optical fork can do.
Photoelectric · Label sensor, capacitive
EU1000 Capacitive Label Sensor
A 0.7 mm capacitive fork that detects transparent as well as opaque labels, switching at 5 kHz with NPN NO/NC + PNP NO/NC output in an aluminium housing.
Model EU1000 · Brand LE Raun · Category: Photoelectric Sensors
Slot width0.7 mm
Response5 kHz
OutputNPN / PNP, NO+NC
HousingAluminium
Overview
Capacitive rather than optical: the fork measures the dielectric change across a 0.7 mm gap, so a clear label on a clear liner changes the field just as a paper label does. That is the only practical way to detect transparent labels at line speed — an infrared fork simply sees through them.The narrower 0.7 mm slot keeps the field concentrated on the web and away from the operator's hand or a nearby metal roller. Response is 5 kHz, and both NO and NC are available on NPN and PNP versions, so the same sensor suits a sinking or sourcing PLC input.
Application scenarios
Beverage and cosmetic lines
Labels clear film on PET bottles where the label is transparent.
Double-label detection
Detects a second label left on the liner after a missed application.
Web splice detection
Senses a splice tape in a clear film web.
Thin foil presence
Verifies aluminium foil or metallised film in a packaging machine.
Industries
- Beverage
- Cosmetics
- Packaging
- Printing
Technical specifications
| Model | EU1000 |
|---|---|
| Standard detecting object | Detects both transparent and opaque objects |
| Output mode | NPN NO, NO or NC + PNP NO, NO or NC |
| Slot width | 0.7 mm |
| Response frequency | 5 kHz |
| Light source | Infrared LED (940 nm) |
| Operating voltage | 12–24 V DC ±10% |
| Ambient temperature | Operating −25 °C to +60 °C · storage −30 °C to +80 °C (no freezing) |
| Protection level | IP65 (IEC) |
| Material | Aluminium housing |
| Product application | Opaque label detection, gap detection, presence/absence detection |
| Response time | ≤1 ms |
| Current consumption | ≤15 mA |
| Output current | ≤100 mA |
| Residual voltage | ≤1.5 V |
| Circuit protection | Short-circuit, reverse polarity, over-current |
| Ambient illumination | Incandescent ≤3,000 lux, sunlight ≤10,000 lux |
| Vibration / shock | 10–55 Hz 1.5 mm, 500 m/s² (X, Y, Z each 2 h) |
Dimensions
| Item | Value |
|---|---|
| Fork opening | 0.7 mm slot, 85 mm deep |
| Mounting | 2 × Ø4.2 mm, 83 mm pitch |
| Connection | M8 connector, 4-pin |
The 0.7 mm slot is the reason this sensor is capacitive: a label passing through it changes the dielectric, so a transparent label is detected as reliably as a printed one.
Wiring & output
| Lead | Colour |
|---|---|
| 2 | Blue |
| 3 | Black |
| 4 | White |
| — | Grey (5-wire types) |
How to specify
- 01
Choose the detection mode
Through-beam for the longest range and the most reliable operation in dust; retro-reflective for one-sided wiring over a few metres; diffuse for colour-independent presence at short range; background suppression where the conveyor or the machine frame sits behind the target.
- 02
Check the target and the background
A diffuse sensor sees the target, not the gap: a dark matt object halves the range. Background suppression types are set by distance, so the background must be at least 20 % further away than the target.
- 03
Match the light spot to the part
A 10 mm spot on a 2 mm wire gives a weak, unstable signal; choose a lens with a small spot at the working distance, or switch to a laser type.
- 04
Decide the output and the housing
NPN for Asian PLC inputs, PNP for European; 4-wire when the PLC needs both states. Square plastic for general use, stainless for washdown, fibre-optic where the space is too tight.
Why this series
Detects transparent labels
Measures dielectric change instead of beam interruption, so clear-on-clear labels are detected reliably.
0.7 mm slot
Concentrates the field on the web — metal rollers and hands nearby do not trigger it.
5 kHz response
Fast enough for the highest labeller speeds in the range.
Questions
Will it detect a paper label too?
Yes — it detects both transparent and opaque objects. It is specified where the label is clear; it does not care about the others.
Why is the slot narrower than the photoelectric version?
A capacitive field spreads; a 0.7 mm gap keeps it tight to the web so adjacent metal parts do not shift the threshold.
Does humidity affect it?
A capacitive sensor is sensitive to water films. In washdown areas fit the fork where the web stays dry, or use the photoelectric EU2100 for opaque labels.
Need a quotation for EU1000 Capacitive?
Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.