In industrial processes, accurate level measurement is essential for operational safety, process continuity, and automation efficiency. From liquid tanks and glycol tanks to food machinery, cooling liquid tanks, wastewater systems, silos, chemical tanks, and high-viscosity applications, every process requires a stable and reliable level measurement solution.
The DX-ECAP Capacitive Level Transmitter is designed to meet these demanding requirements. With its modular structure, durable mechanical design, and wide application range, DX-ECAP offers a dependable solution for continuous level measurement in liquids, powders, granules, sticky materials, and acidic or alkaline media.
What Is DX-ECAP?
DX-ECAP is a capacitive level transmitter used for level measurement in conductive liquids, low-conductivity liquids, solid particulate materials, powders, sticky liquids, and acidic or alkaline fluids.
The device operates by detecting the capacitance change between the electrode rod and the tank wall. When the material enters the area between the probe and the tank wall, the capacitance changes. DX-ECAP measures this change precisely and converts it into an analog output signal for process control and automation systems.
Operating Principle
The working principle of DX-ECAP is based on capacitive measurement. As the level of the material rises or falls around the probe, the dielectric properties between the electrode and the tank wall change. This causes a measurable capacitance variation.
DX-ECAP sensors use a charge transfer method to detect these variations accurately. The measured signal is then converted into an analog output. Empty and full calibration can be performed easily and reliably through zero and span adjustments.
The measurement range and zero point can also be shifted along the probe, allowing the transmitter to adapt to different tank geometries and process requirements.
Wide Range of Applications
DX-ECAP is suitable for a broad variety of industrial applications. It can be used in liquid tanks, glycol tanks, food machinery, cooling liquid tanks, marine applications, brine tanks, wastewater systems, wine storage tanks, and clean water tanks.
It is also suitable for oil tanks, liquid CO₂ tanks, high-temperature tanks, and low-conductivity liquids. For bulk solid applications, DX-ECAP can be used in grain silos, cement silos, sand tanks, dough, milk powder, feed, flour, organic material, and plastic granule tanks.
Special model options are available for hot adhesives, high-viscosity acidic liquids, alkaline liquids, and chemical fluids.
Key Advantages
One of the main advantages of DX-ECAP is that it has no moving parts. This reduces mechanical wear and minimizes maintenance requirements.
Its robust mechanical structure makes it resistant to vibration, while its measuring principle allows stable performance even in applications involving foam or liquid splashing. This makes DX-ECAP particularly suitable for process tanks, mixing vessels, and demanding industrial environments.
The modular design enables easy installation, while the zero and span adjustment provides practical commissioning. DX-ECAP can measure along the complete sensor length and can also operate in reverse mounting applications.
Technical Specifications
DX-ECAP operates with a 9–36 VDC power supply. The standard output is 4–20 mA two-wire. Optional outputs include 0–20 mA, 4–20 mA, and 0–10 V three-wire configurations.
Depending on the model, the operating pressure range is from -1 bar to +25 bar. The standard operating temperature range is from -40 °C to +150 °C. With a cooling adapter, the transmitter can be used up to 200 °C. For cryogenic tank applications, versions suitable for -196 °C are available.
The standard insulation material is PFA. Depending on the application, PEEK, PTFE, rubber, or FKM insulation options can also be selected. The housing protection class is IP66 / IP68 according to EN60529.
Model Options
The DX-ECAP product family includes different model groups for different process conditions.
DX-ECAP 101, 102, 103, and 107 models are suitable for conductive liquids. DX-ECAP 202, 203, 204, 205, and 20S models are designed for low-conductivity liquids.
For solid particulate materials, DX-ECAP 304 and 305 models are available. For sticky liquids and acidic or alkaline media, DX-ECAP 408A and 408B models provide suitable solutions.
This model variety allows users to select the right probe type, connection type, insulation material, and output configuration according to the tank design and process medium.
Electrical Output and Easy Calibration
DX-ECAP offers several output options for easy integration into automation systems. The standard 4–20 mA two-wire output is suitable for many industrial applications. Optional configurations include 4–20 mA three-wire, 0–20 mA three-wire, and 0–10 V three-wire outputs.
Calibration is performed using zero and span settings. The zero adjustment defines the lower measuring point, while the span adjustment defines the upper measuring point. This allows the transmitter to be adapted precisely to the desired measurement range.
The ability to shift the zero point and measuring range provides flexibility for different tank geometries and installation conditions.
Designed for Demanding Process Conditions
DX-ECAP is designed for high-pressure and high-temperature industrial environments. Standard models operate up to +150 °C, while versions with a cooling adapter can be used up to +200 °C. Special options are available for cryogenic tanks down to -196 °C.
The IP66 / IP68 housing protection ensures reliable operation in harsh field conditions. The aluminum injection housing and stainless-steel connection options provide long-term durability.
ATEX-certified versions are also available for explosive gas and dust atmospheres, making DX-ECAP suitable for hazardous area applications.
Conclusion
The DX-ECAP Capacitive Level Transmitter is a versatile and reliable solution for continuous level measurement in industrial processes. With its no-moving-part design, easy calibration, multiple output options, wide temperature and pressure range, and modular structure, it provides dependable performance in liquids, powders, granules, sticky materials, and chemical media.
Thanks to its wide model range, DX-ECAP is an ideal choice for machine manufacturers, process engineers, and industrial plants looking for a durable, accurate, and flexible capacitive level measurement solution.