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(Flat) Liquid Level Sensor

Flat Liquid Level Sensor Overview and Key Advantages

XKC’s flat membrane sensors provide precise, touchless point-level detection through plastic, glass, or ceramic walls. The low-profile design adheres to tank exteriors, preventing contamination and mechanical wear while resisting false triggers from sloshing. Factory calibration and in-house development enable reliable integration for automatic filling, dry-run protection, and overflow control.

How It Works

These devices use capacitive sensing to detect a change in capacitance when the flat electrode aligns with the liquid boundary. Detection is not affected by color, conductivity, or foam. For metal vessels, install over a non-metal observation window or isolation insert to maintain stable performance.

Why Choose XKC

  • Proven design backed by long-term research and multiple patented technologies.

  • Full in-house engineering and production for consistent quality and custom solutions.

  • Sensor-to-controller ecosystem supporting pumps, valves, alarms, and multi-point indication.

Features and Performance

  • Stable point detection through common non-metal walls.

  • Fast response and low power draw.

  • EMC-aware design for operation near motors and variable supplies.

  • Outputs via controllers: digital high/low, relay control, and alarm signaling.

  • Adjustable sensitivity for different materials and wall thicknesses.

  • Rugged housings, adhesive or bracket mounting, and protective coatings for humid or industrial environments.

Product Options and Models

XKC-Y25 / XKC-Y26S / XKC-Y27B Series

Compact non-contact series for dependable point detection on household and industrial tanks.

XKC-Y25

Adhesive, space-saving sensor for small appliances and utility reservoirs.

XKC-Y26S

Industrial variant designed for larger tanks and continuous operation.

XKC-Y27B

Adjustable sensitivity for thicker walls or fluids with challenging dielectric properties.

XKC-Y28A / XKC-Y29A / XKC-Y29D Variants

Options for controller integration, low-voltage environments, and dual set points.

XKC-Y28A

Works with controller-based setups for auto filling and high/low alarms.

XKC-Y29A

Low-voltage operation and chemical compatibility for lab equipment and process skids.

XKC-Y29D

Dual thresholds enable dry-run and overflow protection with a single installation.

Installation and Integration

Mounting

Mark minimum and maximum set points, clean and dry the area, and align the flat electrode. Mount on flat or gently curved sections away from seams and ribs. For metal tanks, use a non-metal window or liner.

Controller Integration (XKC-C382 / XKC-C383 / CY10)

Pair with XKC-C382 for non-contact tank control, XKC-C383 for pipelines and tubes, or CY10 for multi-point display. Controllers drive pumps/valves and provide real-time indication.

Calibration and Tuning

Where supported, adjust sensitivity to match wall thickness and verify stable switching by slowly filling and draining.

Applications

  • Food and milk tanks: touchless detection supports sanitation and reduces wear.

  • Home appliances and medical devices: compact, low-voltage designs suit humidifiers, dishwashers, sterilizers, and lab instruments.

  • Agriculture and industry: reliable point-level control near pumps and motors for process tanks and machinery.

Comparison with Alternative Technologies

Compared with float switches, the non-contact design simplifies retrofits and minimizes maintenance. Versus ultrasonic or optical methods, capacitive point-level detection is less affected by foam and does not require clear acoustic or optical paths.

Portable Validation with E700

Use the E700 portable detector to locate the exact liquid boundary and confirm set points before installation. This reduces trial-and-error and speeds commissioning.

Buyer’s Guide and Terminology

Common naming includes flat liquid level sensor, flat membrane sensor, touchless capacitive water sensor, and capacitive point-level sensor.

Model Selection Criteria

  • Match sensitivity to wall thickness and fluid dielectric.

  • Choose output type and controller pairing.

  • Confirm mounting method and available space.

  • Validate locations with the E700 before adhesion or bracket mounting.

Installation Tips

Clean the surface, avoid seams, apply steady pressure for adhesive mounting, route cables away from heat and vibration, and re-check switching points during commissioning. Contact us to discuss your application or request a quote.

Customization and Quality

Tailored Algorithms

Anti-slosh filtering, foam resistance, and temperature compensation support dynamic processes.

Mechanical and Electrical Options

Custom electrode geometry, mounting fixtures, output interfaces, and cable lengths align with your control architecture.

Testing and Reliability

Functional, environmental, and EMC validation help maintain stable performance and humidity resistance across typical ambient temperatures.


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