Omron E3Z-D61 — Industrial Sensor
SKU: E3Z-D61USD 16.00
Compact diffuse-reflective photoelectric sensor in 20 × 11 × 31 mm cuboid housing, 100 mm range on white paper, infrared LED 860 nm, NPN open-collector output, pre-wired 2 m oil-resistant PVC cable, IP67, Dark-ON/Light-ON selectable.
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Product Overview
The E3Z-D61 is Omron's compact 100 mm diffuse-reflective photoelectric sensor in the E3Z family, the NPN-output sibling of the already-done E3Z-D82 (PNP). It uses an infrared LED (860 nm) emitter and a photodiode receiver in a small 20 × 11 × 31 mm cuboid housing, designed for short-range object detection where the sensor can be mounted close to the target. Typical applications: small-parts presence detection on a feeder bowl, label presence on a packaging line, cap-on-bottle detection on a bottling line, paper-edge detection on a printer, and conveyor-belt object counting.
Diffuse-reflective sensing principle and target effects
Diffuse-reflective sensors (also called 'diffuse' or 'proximity') emit a light beam toward the target and detect the light that is scattered back from the target's surface. Unlike retro-reflective (E3Z-R61 2M, also in our catalog) which uses a reflector, or through-beam (E3Z-T61 / T81) which uses a separate emitter + receiver pair, diffuse-reflective senses the target directly. The trade-off: sensing distance depends on the target's colour and surface finish. A 100 mm sensor rated on white paper (90% reflectivity) will only detect a black paper target at ~30-40 mm (30-40% of nominal). A polished metal target can be detected at 110-120% of nominal.
E3Z-D61 vs E3Z-D62 vs E3Z-D81 vs E3Z-D82
The E3Z D-family is a 2×2 matrix of range × output: D61 / D66 = 100 mm NPN (pre-wired 2 m / M8 connector) D62 / D67 = 1 m NPN (pre-wired 2 m / M8 connector) D81 / D86 = 100 mm PNP (pre-wired 2 m / M8 connector) D82 / D87 = 1 m PNP (pre-wired 2 m / M8 connector) Pick E3Z-D61 (this SKU) for 100 mm range with NPN output, pre-wired 2 m cable. Pick D81 for PNP (European wiring standard, where sensors source current).
NPN wiring and Dark-ON / Light-ON mode select
NPN output means the sensor's output transistor sinks current to ground when active. Wiring: brown wire to +24 VDC, blue wire to 0 V (GND), black wire to the PLC input. The PLC input is pulled up internally (or via an external resistor if the input unit is NPN-sinking). When the sensor detects the target, the output transistor closes between the black output wire and the blue ground wire, sinking current and pulling the input low. For NPN-style PLCs (Japanese standard, where inputs sink current), the input unit's COM is wired to +24 VDC.
Key Features
- Compact diffuse-reflective photoelectric sensor in 20 × 11 × 31 mm cuboid housing
- Sensing distance: 100 mm
- Light source: Infrared LED — invisible to the eye, no visual indication on target
- Differential distance: 20% max of sensing distance
- Response time: 1 ms max
- Output: NPN open-collector, 100 mA max load current
- Dark-ON / Light-ON mode selectable via white wire
- Supply voltage: 12 to 24 VDC ±10%
- SKU: E3Z-D61
- Series: E3Z Compact Photoelectric Sensor with Built-in Amplifier
- Voltage: 12 TO 24 VDC
- I/O: 100 I/O
Best-Fit Applications
- Small-parts presence detection on a vibratory feeder bowl — the E3Z-D61 detects whether the next part has been released from.
- Label presence detection on a packaging line — the E3Z-D61 detects the leading edge of a label on a label.
- Cap-on-bottle detection on a bottling line — the E3Z-D61 detects whether a bottle has a cap applied at the cap-torque.
- Paper-edge detection on a printer or paper-converting machine — the E3Z-D61 detects the paper edge for alignment, with the 20.
Buying Checklist
- Pick E3Z-D61 for 100 mm diffuse-reflective, NPN, pre-wired 2 m — short-range object detection with NPN output
- Pick E3Z-D62 for 1 m diffuse-reflective NPN — longer range with larger beam spot, more sensitive to target colour
- Pick E3Z-D81 for 100 mm diffuse-reflective PNP — same range as D61 but PNP output for European wiring standard
- Pick E3Z-D82 for 1 m diffuse-reflective PNP — longer range with PNP output
- Pick E3Z-D66 for 100 mm diffuse-reflective NPN with M8 connector — quick-disconnect for modular tooling
- Pick E3Z-D86 for 100 mm diffuse-reflective PNP with M8 connector — PNP + M8 connector
Technical Specifications
| Model | E3Z-D61 |
|---|---|
| Series | E3Z Compact Photoelectric Sensor with Built-in Amplifier |
| Type | Diffuse-reflective (proximity), 100 mm range, NPN, pre-wired |
| Sensing Method | Diffuse-reflective (no reflector needed, target acts as reflector) |
| Sensing Distance | 100 mm (white paper 100 × 100 mm); black paper ~30-40 mm; shiny metal ~110-120 mm |
| Light Source | Infrared LED (860 nm), 4-element |
| Differential Distance (Hysteresis) | 20% max of sensing distance |
| Response Time | 1 ms max (operate and release) |
| Output Type | NPN open-collector, 100 mA max load current |
| Output Operation Mode | Dark-ON / Light-ON selectable (via white wire connection) |
| Supply Voltage | 12 to 24 VDC ±10% (ripple 10% p-p max) |
| Current Consumption | 30 mA max |
| Operating Temperature | -25 to +55 °C |
| Storage Temperature | -40 to +70 °C |
| Mounting | 2 × M3 screws on housing flanges, or 1 × M3 through-bolt; optional E39-L40 L-bracket |
Resources & Downloads
FAQ for E3Z-D61
What's the difference between E3Z-D61 and E3Z-D62?
Both are diffuse-reflective NPN-output photoelectric sensors in the E3Z family with the same 20 × 11 × 31 mm cuboid housing and pre-wired 2 m cable. The difference is the sensing distance: D61 (this SKU) has 100 mm range (rated on white paper 100 × 100 mm), D62 has 1 m range.
How do I wire the E3Z-D61 to a CJ1W-ID211 input?
Wire the E3Z-D61's brown wire to +24 VDC supply, blue wire to 0 V (GND), and black wire to the CJ1W-ID211 input terminal. The CJ1W-ID211's COM terminal must be wired to +24 VDC (not to 0 V) to accept NPN sinking signals.
What's the difference between Dark-ON and Light-ON modes on the E3Z-D61?
Dark-ON mode (white wire left open or tied to +24 VDC): the sensor output is ON when no light is received from the target — i.e., when the target is absent. This is the fail-safe default for most industrial applications because a wire break in the sensor output or a power loss to the sensor results in the same 'no signal' state as a target absent.
Can the E3Z-D61 detect black or shiny metal targets?
The E3Z-D61's 100 mm sensing distance is rated on white paper 100 × 100 mm. For black paper targets (5-10% reflectivity), the detection distance drops to ~30-40 mm (30-40% of nominal) — the sensor can still detect black paper but only at 1/3 of the rated range. For polished metal targets (80-95% reflectivity), the detection distance increases to ~110-120 mm (110-120% of nominal) — the sensor detects polished metal slightly beyond the rated range.
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