Skip to content
Omron / Sentech E3Z-T61 / E3Z-T61A / E3Z-T62 / E3Z-T66 / E3Z-T66A / E3Z-T67 / E3Z-T81 / E3Z-T81A / E3Z-T82 / E3Z-T86 / E3Z-T86A / E3Z-T87 machine vision sensor
Omron / SentechPhotoelectric sensors
  • Recommended by AIS Vision

Omron / Sentech E3Z-T Series Through-Beam Photoelectric Sensors

E3Z-T61

The Omron E3Z-T series are compact through-beam photoelectric sensors featuring built-in amplifiers, sold as matched emitter/receiver pairs. Models T61/T81 use infrared LED (870 nm) with a 15 m sensing range; T61A/T81A use red LED (660 nm) with a 10 m range; T62/T82 use infrared LED for extended 30 m range (2 ms response); and T66/T66A/T67/T86/T86A/T87 are the M8 connector equivalents of the respective pre-wired models. All variants share a PBT plastic housing (10.8 x 20 x 31 mm), 12–24 VDC supply, 1 ms response time (except T62/T82/T67/T87 at 2 ms), IEC IP67 protection, and Light-ON/Dark-ON selectable operation. NPN models (6x series) and PNP models (8x series) are otherwise specification-identical.

Brand
Omron / Sentech
Sensor type
Photoelectric
Sensing method
Through-beam (emitter + receiver)
Light source
Infrared LED 870 nm (T61/T62/T66/T67/T81/T82/T86/T87) or Red LED 660 nm (T61A/T66A/T81A/T86A)
Range / distance
15 m (T61/T66/T81/T86), 10 m (T61A/T66A/T81A/T86A), 30 m (T62/T67/T82/T87)
Response time
1 ms (T61/T66/T61A/T66A/T81/T86/T81A/T86A); 2 ms (T62/T67/T82/T87)
Output type
NPN open-collector (T61/T61A/T62/T66/T66A/T67); PNP open-collector (T81/T81A/T82/T86/T86A/T87)
Supply voltage
12–24 VDC ±10%
IP rating
IP67 (IEC)
Housing material
PBT (polybutylene terephthalate)
Dimensions
10.8 mm (W) × 20 mm (D) × 31 mm (H)
Weight
Approx. 65 g pre-wired 2 m set (packed); approx. 20 g M8 connector set (packed)
Request sensor selectionRequest a technical quote

Technical overview

The Omron E3Z-T series are built-in-amplifier through-beam photoelectric sensors sold as matched emitter/receiver pairs in a compact PBT plastic body measuring just 10.8 × 20 × 31 mm. The family covers three sensing distances: the T61/T81 infrared (870 nm) variants reach 15 m, the T61A/T81A red LED (660 nm) variants reach 10 m, and the long-range T62/T82 infrared models extend to 30 m — giving system designers a single mechanical footprint across a wide span of installation geometries. The 660 nm red LED models are the right pick wherever beam alignment must be verified by eye during commissioning, while the 870 nm IR models are preferred where ambient visible light is high or operator distraction is a concern. All variants accept a wide 12–24 VDC supply (±10 %, ripple ≤10 % p-p), making them compatible with both 12 V and 24 V PLC/machine I/O rails without a separate power converter.

Response time is 1 ms across the standard models (T61, T61A, T81, T81A and their M8 connector equivalents T66, T66A, T86, T86A), rising to 2 ms only on the long-range 30 m T62/T82/T67/T87 variants. At 1 ms, the sensor can reliably detect objects moving at speeds that challenge many diffuse-reflective alternatives, making it a natural fit for high-throughput conveyor lines and sortation systems where carriers or packages pass the beam at rates exceeding hundreds of parts per minute. Output topology is selected by model: NPN open-collector for the 6x models (T61, T62, T66, T67 and -A variants), PNP open-collector for the 8x models (T81, T82, T86, T87 and -A variants). Both are otherwise specification-identical, so the same mounting bracket and cable routing can be reused when switching PLC output polarity. Light-ON / Dark-ON operation is field-selectable on all models, enabling use as either a presence detector (object interrupts the beam) or an absence detector without rewiring.

The IP67-rated PBT housing withstands dust ingress and temporary water immersion, making this family suitable for food and beverage lines, washdown-adjacent zones, and outdoor packaging conveyors. Pre-wired models ship with a 2 m cable and weigh approximately 65 g (packed pair), while M8 4-pin connector models (T66/T66A/T86/T86A and long-range T67/T87) drop to roughly 20 g packed and allow in-field connector swap without cutting wire — a significant advantage on multi-lane systems where sensors are routinely replaced during maintenance windows. The short-range M8 connector models T66/T66A/T86/T86A have an operating temperature floor of −40 °C versus −25 °C for pre-wired models, making those variants the choice for cold-store logistics or unheated outdoor enclosures; the long-range M8 variants T67/T87 share the same −25 °C floor as the pre-wired models. All models share the same 10.8 × 20 × 31 mm envelope, so pre-wired and M8-connector variants are mechanically interchangeable on existing mounts.

Best for

  • High-speed conveyor presence detection on packaging lines where 1 ms response time and 15 m or 30 m beam span must cover wide machine frames or cross-aisle gaps
  • Cold-store logistics sortation and parcel detection where the M8 connector T66/T66A/T86/T86A variants' −40 °C lower temperature limit is required and quick-disconnect replacement is valued
  • Automotive body-shop or press-room part-in-place confirmation where NPN or PNP compatibility with safety or standard PLC I/O must be confirmed at design time and beam-break speed matters
  • Food and beverage line object detection and jam sensing in washdown-adjacent zones where IP67 protection and PBT chemical resistance are required
  • Traceability and code-reading trigger generation where a reliable, glitch-free through-beam signal is used to arm a camera or barcode reader as a part enters a fixed read station

Selection notes

  • Choose NPN (6x series: T61, T62, T66, T67) for sink-input PLCs and NPN-input safety modules; choose PNP (8x series: T81, T82, T86, T87) for source-input PLCs. Both model families are mechanically and electrically equivalent in all other respects, so standardising on a single mounting design and then ordering the correct polarity suffix avoids field wiring errors.
  • Select the M8 connector variants (T66, T66A, T67, T86, T86A, T87) for any installation where sensors will be removed for cleaning, line changeover, or maintenance — the connector-model packed weight of ~20 g versus ~65 g for the pre-wired pair also eases dense multi-lane bracket assemblies. Note that the −40 °C lower operating temperature rating applies only to T66/T66A/T86/T86A; the long-range T67/T87 share the standard −25 °C floor of the pre-wired models.
  • If beam alignment visibility during installation is a priority — for instance, first-time setup on a long conveyor span — specify the red LED 660 nm A-suffix models (T61A, T66A, T81A, T86A). Their 10 m range is sufficient for most intra-machine spans; reserve the 870 nm IR models for longer cross-aisle runs or high ambient light environments.
  • For the 30 m long-range requirement (T62/T67/T82/T87), note the response time increases to 2 ms. Verify that the maximum expected object traverse speed across the beam diameter at the installation distance does not produce pulses shorter than 2 ms — at 30 m the beam spot is wider, which partially compensates, but fast-moving small objects (e.g., thin wires or small fasteners) may require a shorter-range model placed closer.
  • The 12–24 VDC ±10 % supply range is broad, but confirm that supply ripple stays at or below 10 % peak-to-peak; excessive ripple on unregulated supplies can cause spurious switching at the 1 ms response threshold on high-speed lines.

Specifications: General
BrandOmron / Sentech
Sensor typePhotoelectric

Specifications: Performance
Range / distance15 m (T61/T66/T81/T86), 10 m (T61A/T66A/T81A/T86A), 30 m (T62/T67/T82/T87)
Response time1 ms (T61/T66/T61A/T66A/T81/T86/T81A/T86A); 2 ms (T62/T67/T82/T87)

Specifications: Interface
ConnectionPre-wired 2 m/0.5 m cable or M8 4-pin connector

Specifications: Electrical
Supply voltage12–24 VDC ±10%

Specifications: Environment
IP ratingIP67 (IEC)
Operating temperature−25 to 55°C (pre-wired cable models); −40 to 55°C (M8 connector T66/T86/T66A/T86A)

Specifications: Sensing
Sensing methodThrough-beam (emitter + receiver)
Light sourceInfrared LED 870 nm (T61/T62/T66/T67/T81/T82/T86/T87) or Red LED 660 nm (T61A/T66A/T81A/T86A)

Specifications: Output
Output typeNPN open-collector (T61/T61A/T62/T66/T66A/T67); PNP open-collector (T81/T81A/T82/T86/T86A/T87)

Specifications: Mechanical
Housing materialPBT (polybutylene terephthalate)
Dimensions10.8 mm (W) × 20 mm (D) × 31 mm (H)
WeightApprox. 65 g pre-wired 2 m set (packed); approx. 20 g M8 connector set (packed)

Frequently asked questions

Related technical guides

Guide

How to choose an industrial sensor for vision triggering and part detection

A practical guide to selecting discrete sensors that trigger cameras, index parts and gate inspection on a vision station. Covers sensing principle, range, target, PNP/NPN/IO-Link outputs, response time and IP rating, plus wiring the trigger to the camera.

Guide

Photoelectric sensor types explained: through-beam, retroreflective, diffuse and background suppression

A practical guide to the core photoelectric sensing principles, through-beam, retroreflective, diffuse and background suppression, covering range, reliability, target and surface dependence, light source choice, output options and how to pick the right one for your application.

Guide

How to choose a 2D and DPM industrial code reader

A practical engineering guide to selecting image-based 1D, 2D and DPM code readers: how to match resolution and field of view to module size, set working distance and depth of field, pick DPM lighting and optics, and choose decode strategy, communication and grading.

Related products

AIS Vision · Integration

We validate camera + lens + lighting

AIS Vision defines and tests the optimal combination of camera, optics and lighting for your application before you buy.

Validate my applicationRequest a lighting study