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The Capacitance Level Transmitter is an advanced device designed to measure the level of liquids and solids in various industrial applications. It operates based on the principle of capacitance change, where the level of the material being measured affects the capacitance between a probe and the tank wall or surrounding medium.
As the level of the material changes, the dielectric constant between the probe and the reference changes, resulting in a corresponding change in capacitance. This change is converted into a continuous output signal, typically 4-20 mA, which can be used for monitoring and control purposes. The Capacitance Level Transmitter is suitable for a wide range of applications, including water treatment, chemical processing, and food production, offering high accuracy and reliability in level measurement.
Measuring Principle: Capacitive.
Application: Fully insulated rod probe for standard and extreme conditions (temperature, pressure, build-up).
Interface Measurement: Measures interfaces between liquids, including emulsions.
Specialties: Inactive length, factory calibrated, and quick response time.
Power Supply: 12-36V DC, HART communication.
Accuracy: Repeatability of 0.1%, linearity error <0.25% for conductive liquids.
Temperature Range: Ambient: -50°C to +70°C; Process: -80°C to +200°C.
Pressure Range: Vacuum to 100 bar (1450 psi).
Materials: Insulation: PTFE, PFA; Body: 316L.
Connections: G1/2 to G1 1/2, NPT, and hygienic options available.
Length: Total: 6m (20ft); Inactive: max. 2m (7ft).
Max. Measurement Distance: 0.1m to 4.0m (0.3ft to 13ft).
Approvals: ATEX, FM, CSA, IEC Ex, SIL, 3A, EHEDG, marine approvals.
Options: Separate housing, gas-tight seal.
Limitations: Insufficient ceiling clearance; non-conductive media with conductivity <100 μS/cm.
Use also in safety systems requiring functional safety to SIL2 in accordance with IEC 61508.
Reliable and universal application thanks to wide range of certificates and approvals
No calibration necessary (factory preconfiguration). No calibration necessary for media with a conductivity of 100μS/cm and higher.
Material in contact with the process made of corrosion-resistant material, FDA-listed materials.
Menu-guided local configuration via plain text display (optional).
Two-stage overvoltage protection.
The Capacitance Level Transmitter operates based on the principle of capacitance measurement. It consists of a probe and a reference, typically the tank wall or another conductive surface. As the level of the material (liquid or solid) changes, the dielectric constant between the probe and the reference changes, affecting the capacitance value.
When the material level rises, the dielectric constant increases, resulting in a higher capacitance. Conversely, when the level drops, the capacitance decreases. This change in capacitance is converted into an electrical signal, usually a 4-20 mA output, which reflects the material level.
The transmitter can accurately measure different levels, including interfaces between two liquids, even in the presence of emulsion layers. Its robust design and quick response time make it suitable for a wide range of industrial applications, ensuring reliable performance in varying conditions.