Omron E2B-M12KS04-M1-B1 Inductive Proximity Sensor

A. Product Overview

The Omron E2B-M12KS04-M1-B1 4 mm PNP Proximity Sensor belongs to the Omron E2B cylindrical proximity sensor series, developed for standard industrial environments where reliable metal detection is required.

The model code identifies it as an M12 brass cylindrical sensor with short body, shielded construction, 4 mm sensing distance, M12 connector, PNP output and normally open operation.

Key Specifications

Model: E2B-M12KS04-M1-B1
Sensor Type: Inductive proximity sensor
Housing Size: M12
Body: Short body
Mounting Type: Shielded
Sensing Distance: 4 mm, plus or minus 10 percent
Recommended Setting Distance: 0 to 3.2 mm
Output: PNP open collector
Operation: Normally open
Supply Voltage: 10 to 30 VDC
Load Current: 200 mA maximum
Response Frequency: 1000 Hz
Indicator: Yellow LED
Connection: M12 4 pin connector
Protection: IP67
Operating Temperature: Minus 25 to 70 degrees Celsius
Housing Material: Nickel plated brass
Sensing Surface: PBT

B. Working Principle

The Omron E2B-M12KS04-M1-B1 works using the inductive proximity sensing principle.

An electromagnetic field is generated at the sensing face of the sensor. When a metallic object enters this field, electrical changes are produced inside the sensing circuit. The sensor detects this change and switches its PNP output.

For this model, when a suitable metal object approaches within the sensing zone, the normally open PNP output switches ON. When the object moves away, the output returns to its normal OFF state.

The sensor is intended primarily for detecting ferrous metal, and Omron notes that sensing distance is reduced for non-ferrous metals.

C. Why Is It Used?

The Omron E2B-M12KS04-M1-B1 is used when machines and automation systems need to detect the presence or position of metal parts without physical contact.

Typical uses include:

• Detecting metal components on production lines
• Machine position sensing
• Conveyor object detection
• Counting metallic parts
• Confirming component presence
• Detecting mechanical end positions
• Monitoring machine movements
• PLC input sensing
• Packaging machinery
• Assembly equipment
• Material handling systems
• Factory automation systems

Because the sensor performs detection without mechanical contact, there is no physical switch mechanism that must be pressed by the target.

Its 1000 Hz response frequency also makes it suitable for relatively fast detection applications.

D. Suitable Buyers

The Omron E2B-M12KS04-M1-B1 is suitable for:

• Industrial automation companies
• Machine manufacturers
• Original equipment manufacturers
• PLC system integrators
• Control panel manufacturers
• Packaging machine manufacturers
• Conveyor system manufacturers
• Assembly line manufacturers
• Factory automation companies
• Process automation companies
• Maintenance departments
• Production plants
• Automotive component manufacturers
• Material handling companies
• Automation engineers
• Electrical engineers
• Maintenance engineers
• System integrators
• Industrial sensor distributors

Frequently Asked Questions

What is Omron E2B-M12KS04-M1-B1?

The Omron E2B-M12KS04-M1-B1 is an M12 inductive proximity sensor with 4 mm sensing distance, PNP output, normally open operation and an M12 connector.

What is the sensing distance of E2B-M12KS04-M1-B1?

Its rated sensing distance is 4 mm plus or minus 10 percent. Omron specifies a recommended setting distance of 0 to 3.2 mm.

Is E2B-M12KS04-M1-B1 PNP or NPN?

It is a PNP open collector proximity sensor. The B designation in the model number represents PNP output.

Is the output normally open?

Yes. The B1 suffix indicates PNP normally open operation.

What voltage does the sensor require?

The sensor operates from 10 to 30 VDC, including the specified ripple allowance.

What type of objects can it detect?

It is designed primarily for ferrous metal detection. The sensing distance becomes shorter with non-ferrous metals.

Is this a shielded proximity sensor?

Yes. The E2B-M12KS04-M1-B1 is a shielded M12 proximity sensor.

What connector is used?

It uses an M12 4 pin connector.

What is the response frequency?

The specified response frequency for the M12 shielded 4 mm model is 1000 Hz.

What is the maximum load current?

The control output supports a maximum load current of 200 mA at up to 30 VDC.

Does the sensor have an indicator?

Yes. It has a yellow LED operation indicator.

Is Omron E2B-M12KS04-M1-B1 waterproof?

The sensor has an IP67 degree of protection according to IEC 60529.

What is the operating temperature range?

It can operate from minus 25 to 70 degrees Celsius, provided there is no icing or condensation.

What material is the sensor housing made from?

The housing is made from nickel plated brass, while the sensing surface is PBT.

Can it be connected to a PLC?

Yes. Its 10 to 30 VDC PNP output is suitable for connection to compatible industrial PLC digital inputs, provided the PLC input specifications are compatible with the sensor output.

Where is E2B-M12KS04-M1-B1 commonly used?

It is commonly used in industrial automation, conveyors, packaging machines, assembly equipment, machine tools, production lines and metal part detection systems.