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Capacitive proximity sensors are essential components in automated systems, detecting a wide range of materials including liquids, powders, and non-metallic solids. Selecting the correct sensor ensures reliable operation, prevents false triggers, and optimizes process efficiency. Understanding key specifications and features will help you choose a sensor that meets your application's unique demands.
Product Name : Capacitive Proximity Switch;Model : LJC18A3-B-Z/BX;Wire Type : DC 3 Wire Type (Brown, Black, Blue);Switch Appearance Type : Cylinder Type
Theory : Capacitance Sensor;Output Type : NPN NO(Normal Open);Diameter of Head : 18mm;Detecting Distance : 1-10mm
Detecting Object : Metal or Nonmetal Material;Supply Voltage : DC 10-30V;Current Output : 200mA;Response Frequency : 100Hz
Operating Temperature : -25 to +65 Celsuis (Non-freezing Condition);Size : 7.5 x 3cm / 3"x 1.2"(L*Max. Dia);Cable Length : 120cm/47";External Material : Plastic, Alloy
Net Weight : 108g; Package Content : 1 x Capacitive Proximity Switch
Detect material: any dielectric substance(NOTE: This M18 capacitive proximity switch is also capable of detecting common non-dielectric materials in everyday use, though its sensitivity is lower than when detecting dielectric substances). Output type: PNP...
Versatile Non-Metallic Detection: Go beyond metal sensing. This Capacitive Proximity Sensor Switch is engineered to detect a wide array of materials including glass, plastic, water, oil, and wood. It’s the essential choice for Non-Metallic Level...
Precision PNP Normally Open (NO) Logic: Reliable signaling for your PLC or controller. Operating on a DC 10-30V range with a 300mA output, the PNP normally open 3-wire configuration ensures a clean, fast response. Each unit features a high-visibility LED...
10mm Adjustable Sensing Distance: Tailor the sensitivity to your specific material. Unlike fixed sensors, the LJC18A3-B-Z features a built-in potentiometer on the rear. This allows you to fine-tune the 10mm Detecting Distance to compensate for different...
Rugged M18 Industrial Housing: Built for durability in harsh conditions. Protected by an impact-resistant shell, this M18 sensor is designed to withstand vibration and dust. It is widely used as a limit switch in CNC machinery and as an upgraded 3D...
Stable 3-Wire Interference Resistance: Minimize downtime. The high-quality internal circuitry is optimized to resist electromagnetic interference (EMI), preventing false triggers in noisy electrical environments. Whether it’s for a DIY garage project or...
Special attention: After the switch is installed, the sensing distance needs to be adjusted, otherwise, there will be no response when the switch is turned on.There are two friends recently. The reaction product does not work, First note: our products are...
Product Name : Capacitive Proximity Switch; Model : LJC18A3-H-Z/BX;Wire Type : DC 3 Wire Type (Brown, Black, Blue);Theory : Capacitance Sensor; Output Type : NPN NO(Normal Open);Diameter of Head : 16mm; Thread Diameter:18mm; Detecting Distance : 1-10mm
Operating Temperature : -25 to +65 Celsius (Non-freezing Condition);Size : 7.5 x 3cm / 3"x 1.2"(L*Max. Dia);Cable Length : 120cm/47";External Material : Plastic, Alloy
Detecting Object : Metal or Nonmetal Material; Supply Voltage : DC 6-36V;Current Output : 300mA;Response Frequency : 100Hz
Net Weight : 85g;Color : Silver Tone, blue, Gray; Package Content : 1 x Capacitive Proximity Switch
Detect material: any dielectric substance(NOTE: This M18 capacitive proximity switch is also capable of detecting common non-dielectric materials in everyday use, though its sensitivity is lower than when detecting dielectric substances). Output type: NPN...
Detect material: any dielectric substance(NOTE: This M18 capacitive proximity switch is also capable of detecting common non-dielectric materials in everyday use, though its sensitivity is lower than when detecting dielectric substances). Output type: NPN...
Last update on 2026-07-18 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Capacitive Proximity Sensors
Application-Specific Selection
When choosing a capacitive proximity sensor, consider the material to be detected, the operating environment, and the required switching frequency. For detecting liquids or granular materials, ensure the sensor's face is resistant to buildup or corrosion. In dusty or humid environments, a sensor with a sealed housing and appropriate IP rating is vital. Always consider the size and dielectric constant of the target material, as these factors influence detection reliability.
Frequently Asked Questions
What types of materials can capacitive sensors detect?
Capacitive sensors can detect a wide variety of materials, including non-metallic solids, liquids, powders, and granular substances. They are also capable of detecting metallic objects.
How does the material of the target affect detection?
The dielectric constant of the target material significantly impacts detection. Materials with a higher dielectric constant are generally easier for capacitive sensors to detect at greater distances.
What is the difference between NPN and PNP outputs?
NPN and PNP refer to the sensor's output wiring configuration. NPN sensors sink current to ground, while PNP sensors source current from the positive supply. Ensure compatibility with your control logic.
Can capacitive sensors be used outdoors?
Many capacitive sensors are designed for industrial environments and can be used outdoors, provided they have an adequate IP rating for protection against dust and moisture. Check the product's specifications for environmental resistance.
How do I prevent false triggering in dusty environments?
To prevent false triggering, select a sensor with a suitable sensing range and a material that is less prone to accumulating dust. Some sensors also offer adjustable sensitivity or filtering options to mitigate environmental interference.
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