Omron E3ZM-R81 2M Retroreflective Photoelectric Sensor

USD 236.95

IP69K stainless steel retroreflective sensor with M.S.R. 4m range, 1 ms response, PNP output, and ECOLAB certified for high-temperature washdown environments.

SKU Omron-E3ZM-R81 2M Category
Sensors > Photoelectric Sensors

Omron E3ZM-R81 2M Retroreflective Photoelectric Sensor

Model Identifier E3ZM-R81 2M
Official Part Number E3ZM-R81 2M
GTIN Standard 4547648235761

Technical Overview

The Omron E3ZM-R81 2M is a highly durable, retro-reflective photoelectric sensor engineered for rigorous industrial and hygienic environments. Housed in a robust SUS316L stainless steel enclosure with a PMMA lens, it is ECOLAB compliant and boasts an IP67/IP69K protection rating, making it perfectly suited for high-pressure, high-temperature washdown applications. Featuring a built-in amplifier and Mirror Surface Rejection (M.S.R.) technology, it ensures reliable detection of objects up to 4 meters away, effectively ignoring false reflections from shiny targets. The sensor provides a fast 1 ms response time, dual Dark-ON/Light-ON operating modes, a PNP digital output, and comes conveniently pre-wired with a 2-meter cable for immediate integration.

Key Features

  • IP67 and IP69K rated for maximum resistance to high-pressure and high-temperature washdowns.
  • Constructed with a premium SUS316L stainless steel housing and PMMA lens.
  • ECOLAB compliant for certified chemical resistance in food, beverage, and pharmaceutical applications.
  • Retro-reflective sensing with M.S.R. (Mirror Surface Rejection) function for stable detection of shiny objects.
  • Pre-wired 2-meter cable with selectable Light-ON / Dark-ON operation and a 30VDC PNP output.
  • Fast 1 ms response time for high-speed manufacturing and packaging lines.

Operates on a 10 to 30 VDC supply voltage with a maximum current consumption of 25 mA.

Technical Specification Matrix

ParameterValue
Sensing MethodRetro-reflective with M.S.R.
Sensing Distance100 mm to 4000 mm
Light SourcePolarized Red LED (660 nm)
Supply Voltage10 to 30 VDC (12-24 VDC nominal)
Current Consumption25 mA maximum
Output TypePNP Digital Output (30VDC max)
Operation ModeSelectable Light-ON / Dark-ON
Response Time1 ms
Housing MaterialSUS316L Stainless Steel
Lens MaterialPMMA
Degree of ProtectionIP67 / IP69K
Ambient Operating Temperature-25°C to +55°C
Connection MethodPre-wired 2 m cable
Dimensions (W x H x D)10.8 mm x 32.2 mm x 21.0 mm

Industrial Applications

1. Food and Beverage Washdown Conveyor Monitoring

Used to detect the presence of food packages or bottles on a high-speed production conveyor that undergoes frequent, intense sanitization routines.

Problem Solved

Standard plastic sensors fail or degrade due to daily high-pressure chemical washdowns. The sensor's ECOLAB-certified SUS316L stainless steel housing and IP69K rating completely withstand aggressive detergents and high-temperature water jets, while the MSR function prevents false triggering off shiny food packaging.

IP69KECOLAB compliantSUS316L Stainless SteelM.S.R. FunctionRetro-reflective

2. Pharmaceutical Blister Pack Detection

Mounted in tight spaces within pharmaceutical packaging equipment to verify the passage of highly reflective blister packs.

Problem Solved

Shiny metallic blister packs often confuse standard sensors by reflecting light directly back, leading to machine miscounts. The Mirror Surface Rejection (M.S.R.) feature coupled with a polarized red LED guarantees that the sensor precisely distinguishes between the retro-reflector and the glossy target. Its compact 10.8mm width easily integrates into confined machine spaces.

M.S.R. (Mirror Surface Rejection)Polarized Red LEDCompact Housing1 ms Response TimePNP Output

3. Cold Storage Logistics Operations

Detects the movement of pallets and crates across automated routing junctions inside freezing warehouse environments.

Problem Solved

Sub-zero environments cause standard sensors to malfunction, freeze, or suffer from housing cracks. With a rugged stainless steel enclosure, an operating temperature rated down to -25°C, and an IP67/IP69K watertight seal, this sensor operates flawlessly in cold storage without condensation damage, reliably sensing targets up to 4 meters away.

-25°C Ambient TemperatureIP67 / IP69K4m Sensing DistanceDark-ON/Light-ON Mode
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