NPN, NC/NO Proximity Sensors 100

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Part RoHS Manufacturer Sensors or Transducers Type Mounting Feature No. of Terminals Output Type Package Shape or Style Output Range Package Body Material Maximum Supply Voltage Maximum Output Current Technology Screening Level Input Mode Body Length/Diameter Body Width Power Supplies (V) Output Circuit Type Maximum Accuracy (%) Resistance Package Equivalence Code No. of Axes Sub-Category Linearity (%) Body Height Minimum Supply Voltage Maximum Operating Temperature Response Time Minimum Operating Temperature Sensitivity (mV/G) Terminal Finish Termination Type Output Interface Type Output (V) Maximum Operating Current Output Polarity Additional Features Maximum Measurement Range (mm) Housing JESD-609 Code Minimum Measurement Range (mm)

E2EQ-X8C3185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

8.8 mm

FLUORORESIN

0 mm

E2EQ-X10C3305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

11 mm

FLUORORESIN

0 mm

E2A-S12LS04-M1-C3

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

32 V

12 mm

56 mm

10 V

70 Cel

-40 Cel

CONNECTOR

4-WIRE INTERFACE

10 mA

IP 67, IP 69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

4 mm

STAINLESS STEEL

0 mm

E2EQ-X4C3125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

4.4 mm

FLUORORESIN

0 mm

E2EQ-X15C3305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

16.5 mm

FLUORORESIN

0 mm

E2EQ-X6C3125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

6.6 mm

FLUORORESIN

0 mm

E2Q5-N20E3-M1

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

SQUARE

30 V

40 mm

40 inch

10 V

85 Cel

-25 Cel

CONNECTOR

20 mA

IP67, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION

22 mm

PBT

0 mm

E2Q5-N40ME3-M1

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

SQUARE

30 V

40 mm

40 inch

10 V

85 Cel

-25 Cel

CONNECTOR

20 mA

NON-SHIELDED, IP67, IP69K, SHORT-CIRCUIT PROTECTION, REVERSE POLARITY PROTECTION

44 mm

PBT

0 mm

E2A-S12LN08-M1-C3

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

32 V

12 mm

56 mm

10 V

70 Cel

-40 Cel

CONNECTOR

4-WIRE INTERFACE

10 mA

IP 67, IP 69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

8 mm

STAINLESS STEEL

0 mm

E2EQ-X5C3185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

5.5 mm

FLUORORESIN

0 mm

E2EQ-X2C3125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

2.2 mm

FLUORORESIN

0 mm

E2EQ-X22C3305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

24.2 mm

FLUORORESIN

0 mm

E2EQ-X12C3185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

13.2 mm

FLUORORESIN

0 mm

E2E-X8MC312-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

8.8 mm

STAINLESS STEEL

0 mm

E2E-X30MC3L305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

33 mm

NICKEL PLATED BRASS

0 mm

E2E-X12C3185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

13.2 mm

NICKEL PLATED BRASS

0 mm

E2E-X18MC3L305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

19.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X16MC318-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

17.6 mm

NICKEL PLATED BRASS

0 mm

E2E-X16MC318-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

17.6 mm

NICKEL PLATED BRASS

0 mm

E2E-X40MC3L30-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

44 mm

NICKEL PLATED BRASS

0 mm

E2E-X5MC312-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

5.5 mm

NICKEL PLATED BRASS

0 mm

E2E-X10C3305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X16MC3L185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

17.6 mm

NICKEL PLATED BRASS

0 mm

E2E-X8C318-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

8.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X12C3L185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

13.2 mm

NICKEL PLATED BRASS

0 mm

E2E-X2C3L125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

2.2 mm

STAINLESS STEEL

0 mm

E2E-X8C318-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

8.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X8MC312-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

8.8 mm

STAINLESS STEEL

0 mm

E2E-X8C3L185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

8.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X12C318-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

13.2 mm

NICKEL PLATED BRASS

0 mm

E2E-X18MC330-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

19.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X10MC312-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X22C330-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

24.2 mm

STAINLESS STEEL

0 mm

E2E-X8MC3L125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

8.8 mm

STAINLESS STEEL

0 mm

E2E-X10MC318-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X12C318-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

13.2 mm

NICKEL PLATED BRASS

0 mm

E2E-X10MC3L185M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X30MC3L30-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

33 mm

NICKEL PLATED BRASS

0 mm

E2E-X6C312-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

6.6 mm

NICKEL PLATED BRASS

0 mm

E2E-X2C312-R2M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

2.2 mm

STAINLESS STEEL

0 mm

E2E-X30MC3L30-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

33 mm

NICKEL PLATED BRASS

0 mm

E2E-X10C330-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X15C3305M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

16.5 mm

NICKEL PLATED BRASS

0 mm

E2E-X10MC3125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR, UNSHIELDED

11 mm

NICKEL PLATED BRASS

0 mm

E2E-X15C330-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

16.5 mm

NICKEL PLATED BRASS

0 mm

E2E-X8C318-M1TJR0.3M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE WITH CONNECTOR

3-WIRE INTERFACE

20 mA

IP67, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

8.8 mm

NICKEL PLATED BRASS

0 mm

E2E-X6C312-R5M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

70 Cel

-25 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

6.6 mm

NICKEL PLATED BRASS

0 mm

E2E-X2C3125M

Omron

PROXIMITY SENSOR,INDUCTIVE

NPN, NC/NO

CYLINDRICAL

30 V

10 V

85 Cel

-40 Cel

CABLE

3-WIRE INTERFACE

20 mA

IP67, IP67G, IP69K, REVERSE POLARITY PROTECTION, SHIELDED, SHORT CIRCUIT PROTECTION, SURGE SUPPRESSOR

2.2 mm

STAINLESS STEEL

0 mm

Proximity Sensors

Proximity sensors are electronic sensors that are used to detect the presence or absence of an object in close proximity to the sensor. They work by detecting changes in the electromagnetic field around the sensor caused by the presence of an object. Proximity sensors are widely used in a variety of applications, such as industrial control systems, robotics, automotive, and consumer electronics.

There are several types of proximity sensors, including inductive sensors, capacitive sensors, magnetic sensors, and ultrasonic sensors. Inductive sensors use electromagnetic induction to detect metallic objects, while capacitive sensors use changes in capacitance to detect non-metallic objects. Magnetic sensors use changes in magnetic fields to detect metallic objects, and ultrasonic sensors use sound waves to detect objects.

Proximity sensors offer several advantages over other types of sensors. They are highly reliable and can operate in harsh environments and extreme temperatures. They are also non-contact sensors, which means they can detect objects without physical contact with the object being measured. Additionally, they can be used to detect objects of different shapes and sizes, making them highly versatile.

However, proximity sensors also have some limitations, such as limited range of operation and sensitivity to external disturbances. They can also be affected by the material composition and surface texture of the object being detected.