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Capacitive sensors

What are Capacitive Sensors?

SCMA has been officially appointed as the sole authorized distributor of ifm in Thailand. 

Capacitive sensors are devices used to detect metallic, non-metallic objects, and liquids with high accuracy. They can be tailored for a wide range of applications such as detecting liquid levels, seeds, plastic pellets, etc., in silos through acrylic sight glasses (Sight glass).

Advantages of Capacitive Sensors

  • Capacitive sensors have high detection sensitivity.
  • They can detect insulating objects such as plastic, glass.
  • No direct contact with the object is required, reducing wear and tear during use.

Why Choose Capacitive Sensors from ifm?

ifm electronic, a global brand specializing in the production and distribution of sensors for industrial automation systems, offers high-quality products with cutting-edge technology. This enhances efficiency and reliability in smart factories. The sensors feature IO-Link, which is crucial for developing intelligent industries by improving manufacturing efficiency, reducing errors, and enhancing process control accuracy to deliver top-notch product quality.

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Capacitive Sensor (A sensor that detects metal, non-metal, and all types of liquids)

Object detection sensors are important devices that enhance the efficiency of modern automated systems. Capacitive Sensors or capacitive sensors stand out for their ability to detect a wide variety of objects including metals, non-metals, and liquids without contact. At SCMA we are the official sole distributor of ifm electronic in Thailand, equipped with a team of experts to advise on selecting detection systems that meet your needs.

What is a Capacitive Sensor?

A proximity sensor is a non-contact object detection sensor for industrial use. A capacitive sensor is one type that can detect both metals and non-metals, including plastics, water, wood, glass, and dust. It uses the principle of an electric field and capacitance; when an object enters the detection range, the capacitance value changes causing the sensor to signal immediately. Suitable for liquid level monitoring, seed or plastic pellet counting in silos through sight glasses with precision.

How Capacitive Sensors Work

Capacitive sensors use a front plate capacitor and ground to create an electric field via an oscillator continuously. When an object enters the electric field, capacitance increases causing the circuit to oscillate and signal status change. Detection capability depends on the dielectric constant of materials, type and size of objects, as well as distance. Learn more about capacitive sensor technology.

Types of Capacitive Sensors

How many types are there? There are several types based on their operation. Capacitive sensors can be categorized by installation type and purpose:

General Proximity Sensor (Capacitive Proximity Sensor)

Standard proximity sensors detect objects both metallic and non-metallic up to a range of 5-50 millimeters through electric field changes when an object enters. Suitable for position detection on conveyor belts, counting workpieces, or checking products in packaging.

Insertion Type Level Sensor

Capacitive sensors with probe insertion measure liquid or solid levels inside containers. When material level touches the probe, capacitance changes and signals are sent. Suitable for small storage tanks, silos, or pipelines requiring precise point-level measurement.

Submerged Type Level Sensor

Sensors submerged in liquids measure continuous liquid levels without additional probes by converting pressure into level data. Suitable for deep wells, large tanks, or high-precision water treatment systems.

Key Features of Capacitive Sensors

SCMA selects high-quality capacitive sensors from ifm electronic with standout features:

  • High Detection Sensitivity - Ifm proximity sensors have high sensitivity to detect insulating materials such as plastic, glass, and low dielectric constant materials. Widely applicable.
  • No Damage to Workpieces - The non-contact detection of capacitive sensors prevents wear and tear on objects, reducing damage during use and maintaining workpiece surface quality.
  • Durable in Industrial Environments - Operates well in dusty, wet, or oily conditions. Special models have chemical-resistant housings for harsh working environments.
  • IO-Link Technology - Ifm sensors come with IO-Link, a key technology in smart industry development. Enhances production efficiency, reduces errors, and improves process control accuracy.
  • Easy Adjustment - Capacitive sensors have adjustable sensitivity settings for materials and distances. Customizable according to actual usage conditions.
  • Long Service Life - No moving parts or wear-prone contact surfaces, reducing maintenance frequency and spare part replacement.

Why Choose Capacitive Sensors from ifm?

Ifm electronic is a global brand specializing in sensor production for industrial automation. With advanced technology and high-quality products, smart factories can operate efficiently and reliably:

International Standard Accuracy

Sensors from ifm are designed and manufactured to strict standards providing accurate and consistent measurement results suitable for high-precision work reducing production process errors.

IO-Link Technology for Industry 4.0

Sensors come with IO-Link technology enabling real-time data exchange with control systems, increasing flexibility in configuration and status monitoring supporting efficient smart factory development.

Proven Quality

Leading manufacturers such as Balluff and ifm electronic have developed sensor technology for a long time. Ifm stands out with durability and longevity, trusted by leading industries worldwide.

Applications of Capacitive Sensors

Ifm's capacitive proximity sensors are indispensable in various industries enhancing efficiency and accuracy:

  • Food & Beverage Industry - Capacitive sensors check liquid levels in mixing tanks, detect bottles or cans on conveyor belts, control automatic ingredient dispensing, and count packaging.
  • Chemical & Petrochemical Industry - Used to measure chemical levels in storage tanks, monitor liquid flow in pipes, detect leaks, and control automatic mixing processes.
  • Plastics Industry - Count plastic pellets in silos through sight glasses, check raw material powder levels, detect plastic parts on conveyor belts, and control material feeding into injection molding machines.
  • Packaging Industry - Proximity sensors check product packaging in boxes, detect liquid filling levels, count items on pallets, and control arrangement on conveyor belts.
  • Agriculture & Animal Feed Industry - Measure seed levels in silos, monitor animal feed flow in pipelines, control automatic feeding, and monitor raw material levels in storage tanks.
  • Water & Wastewater Treatment - Capacitive sensors measure water levels in treatment ponds, control automatic pumping, monitor chemical treatment levels, and prevent tank overflow.
  • Automotive Industry - Detect plastic and rubber parts, check oil levels in tanks, control workpiece feeding into assembly lines, and count parts in boxes.
  • Paper Manufacturing - Use capacitive sensors to measure pulp levels in tanks, detect paper sheets on conveyor belts, control surface coating, and count sheet numbers in bundles.

Ifm Capacitive Sensors at SCMA

SCMA is a technical partner ready to support you every step of the way. As the official sole distributor of ifm electronic in Thailand, we guarantee quality products with over 40 years of automation experience. Our team of expert engineers provides consultation from requirement analysis, system design, installation and testing, through training and after-sales service. Learn more about our services.

Summary

Selecting the right capacitive sensor from ifm electronic is crucial for enhancing automation system efficiency and production quality control. SCMA Company Limited is a reliable partner in providing high-quality capacitive sensors from ifm, a leading global brand with comprehensive services including consultation, system design, installation, maintenance, and more. Contact us today to receive free advice and create detection systems tailored to your business needs.

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