RDCL Integrated Capacitive Level Sensor RDCLDR500
The RDCL Integrated Capacitive Level Sensor RDCLDR500 is a digital industrial level transmitter designed for continuous level measurement of liquids, powders, and granular solids in storage tanks, process vessels, and industrial silos.
It operates using advanced capacitance sensing technology to provide reliable level measurement and features an integrated LCD display for real-time level indication.
The RDCLDR500 supports measuring ranges up to 30 meters and offers multiple output configurations, including 4 to 20 mA, HART, and RS485. It operates on a 15 to 36V DC power supply and features IP67 protection for reliable performance in industrial environments.
Available with stainless steel and PTFE probe material options, the RDCLDR500 is suitable for chemical processing, water treatment, pharmaceutical manufacturing, food processing, and industrial automation applications.
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A. Product Overview
The RDCLDR500 Integrated Capacitive Level Sensor continuously measures material levels in industrial tanks, vessels and silos by detecting dielectric-related capacitance changes around its probe.
It measures compatible liquids, powders and granules with suitable probes and calibration, continuously rather than at fixed switching points.
An integrated LCD shows level, percentage and status. Output options include 4 to 20 mA, HART and RS485 for compatible PLC and DCS systems. Stainless steel and PTFE probes support suitable process media.
Important Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Integrated Capacitive Level Sensor |
| Brand | RDCL |
| Model Number | RDCLDR500 |
| Sensor Type | Integrated Capacitive Level Transmitter |
| Measurement Principle | Capacitive Sensing |
| Measurement Type | Continuous Level Measurement |
| Measuring Range | Up to 30 meters |
| Capacitance Range | 0.1 to 2500 pF |
| Accuracy Options | 0.2% and 0.5% |
| Power Supply | 15 to 36V DC |
| Analog Output | 4 to 20 mA |
| Communication Options | HART and RS485 |
| Display | Integrated Digital LCD |
| Probe Materials | Stainless Steel 316, PTFE, 1Cr18Ni9Ti alloy |
| Ambient Temperature | −40°C to 85°C |
| Storage Temperature | −50°C to 60°C |
| Probe Temperature Resistance | −50°C to 550°C, configuration dependent |
| Published Pressure Range | 0.1 to 32 MPa, configuration dependent |
| Long-Term Stability | Not more than 0.1% FS/year |
| Temperature Drift | Not more than 0.1% FS/°C within 0°C to 70°C |
| Protection Rating | IP67 |
| Installation | Threaded, flanged or top mounted |
| Suitable Media | Compatible liquids, granules and powders |
| Applications | Industrial tank and silo monitoring |
Technical Note: These options vary by unit. Confirm accuracy, pressure, temperature, materials, outputs and explosion protection against the final datasheet. Published figures may differ.
B. Working Principle
The probe measures capacitance against a reference electrode, such as a suitable metal tank wall or a separate electrode. Material moving around the probe changes capacitance through its dielectric properties. Electronics convert this to a calibrated level reading.
Step-by-Step Working Process
Capacitance Formation: The probe and reference electrode form the sensing arrangement.
Level Variation: Rising or falling material changes probe coverage and capacitance.
Detection: The circuit continuously measures capacitance changes.
Processing: Electronics filter the measurement and apply calibration.
Calculation: The processor determines level from probe geometry, range and material properties.
LCD Indication: The display shows measured level, percentage and status.
Transmission: The selected 4 to 20 mA, HART or RS485 interface transmits the result.
Monitoring: PLCs, DCS systems and compatible equipment can display, record and use the signal for control.
Note: Accuracy depends on the dielectric properties, calibration, probe design and installation. No moving float is required.
C. Why Is the RDCLDR500 Integrated Capacitive Level Sensor Used?
The RDCLDR500 provides continuous level measurement with local display and automation outputs.
Key Benefits
Continuous Measurement: Tracks changing levels rather than only high or low points.
Integrated LCD: Displays level, percentage and applicable status on site.
Industrial Outputs: 4 to 20 mA, HART and RS485 options for compatible systems.
Long Range: Measuring lengths up to 30 meters with an appropriate probe.
Accuracy Options: Published 0.2% and 0.5% specifications depend on configuration.
No Moving Float: Reduces mechanical wear in the sensing assembly.
Material Options: Stainless steel and PTFE for compatible process media.
PLC and DCS Integration: Supports monitoring, alarms and automatic control.
IP67 Protection: Protection against dust and temporary immersion under test conditions.
Flexible Installation: Threaded, flanged and top-mounted options.
Long-Term Stability: Listed as no more than 0.1% FS per year under applicable conditions.
Storage Management: Supports inventory tracking and filling or emptying control.
Common Applications
Water Tanks: Industrial water storage and treatment systems.
Chemical Tanks: Compatible liquids with suitable probe material and insulation.
Oil Storage: Oils and lubricants after probe selection and dielectric calibration.
Pharmaceutical Processing: Compatible process and utility liquid storage.
Food Processing: Milk, juice and other liquids when hygiene requirements are met.
Powder Silos: Compatible powders with appropriate capacitive probes.
Granular Storage: Suitable granular materials in tanks and silos.
Wastewater Treatment: Tanks where buildup and fouling can be managed.
Mixing Vessels: Processes within verified pressure and temperature limits.
Automation and Inventory: Bulk material handling, process control and level records.
D. Suitable Buyers
Suitable for industrial buyers monitoring liquids or bulk solids.
| Buyer Category | Typical Requirement |
|---|---|
| Chemical Manufacturers | Continuous chemical tank monitoring |
| Water Treatment Operators | Water and process tank measurement |
| Wastewater Treatment Companies | Treatment tank level indication |
| Pharmaceutical Manufacturers | Compatible process liquid monitoring |
| Food Processing Companies | Liquid storage and processing levels |
| Petrochemical Industries | Suitable oil and process liquid measurement |
| Industrial Plant Operators | Tank and vessel level monitoring |
| Bulk Material Handling Companies | Compatible powder and granule monitoring |
| Silo Manufacturers | Capacitive transmitter integration |
| OEM Equipment Manufacturers | Machine level measurement |
| Automation System Integrators | PLC and DCS integration |
| Process Control Engineers | Continuous process measurement |
| Maintenance Engineers | Transmitter replacement and upgrades |
| Instrumentation Contractors | Installing level monitoring systems |
| Industrial Instrument Distributors | Supplying capacitive transmitters |
| Engineering Procurement Companies | Industrial instrument procurement |
| Chemical Storage Operators | Liquid storage tank monitoring |
| Industrial Project Consultants | Instrument selection and system design |
Keywords: capacitive level transmitter, 4 to 20 mA, RS485, LCD, powder and silo level sensor.
E. Frequently Asked Questions (FAQ)
1. What is the RDCL RDCLDR500 Integrated Capacitive Level Sensor?
The RDCLDR500 is an industrial transmitter for continuous level measurement of compatible liquids, powders and granular materials using capacitive sensing technology.
It has an integrated LCD display and offers 4 to 20 mA, HART and RS485 output configurations for industrial monitoring.
2. How does the RDCLDR500 Integrated Capacitive Level Sensor work?
The sensing probe detects capacitance changes as material rises or falls around it. The dielectric properties of the process medium differ from those of air, causing the measured capacitance to vary.
The transmitter processes this change according to its calibration and converts it into a continuous level measurement.
3. What is the measuring range of the RDCLDR500?
The RDCLDR500 product range supports measuring lengths up to 30 meters.
The usable range depends on the selected probe, tank dimensions, medium and installation arrangement.
4. Can the RDCLDR500 measure both liquids and solids?
Yes. It is intended for compatible liquids, powders and granular materials.
Measurement suitability depends on dielectric properties, probe configuration and calibration for the material being monitored.
5. Does the RDCLDR500 have an integrated LCD display?
Yes. Its integrated digital LCD provides local indication of measured level, percentage and applicable instrument status, allowing readings at the installation location.
6. Does the RDCLDR500 support a 4 to 20 mA output?
Yes. A 4 to 20 mA output option can transmit continuous level measurements to compatible PLC analog inputs, process indicators and other monitoring equipment.
7. Does the RDCLDR500 support HART communication?
Yes. The product range includes a 4 to 20 mA configuration with HART communication.
Both the selected transmitter and the connected equipment must support the HART interface.
8. Does the RDCLDR500 support RS485 communication?
Yes. RS485 is an available digital communication option.
The exact protocol, addressing and register information must be confirmed for the selected version before integration.
9. Can the RDCLDR500 be connected to a PLC?
Yes. The transmitter can connect through a compatible 4 to 20 mA analog input or a supported digital interface.
An RS485 connection also requires matching PLC communication capabilities, protocol and settings.
10. What power supply is required for the RDCLDR500?
The listed supply range is 15 to 36V DC.
Confirm the power requirements of the actual model and output configuration before wiring or installation.
11. What is the measurement accuracy of the RDCLDR500?
The product specifications list 0.2% and 0.5% accuracy options.
Applicable accuracy depends on configuration, measuring span, material properties and installation. Verify the selected unit's datasheet.
12. What is the protection rating of the RDCLDR500?
The RDCLDR500 is listed with IP67 protection, indicating resistance to dust ingress and temporary water immersion under defined test conditions.
This does not establish suitability for continuous underwater installation.
