Capacitance Level Transmitter – EB RF Series
Principle
The EB RF series capacitance level transmitter utilizes the capacitance formed between the sensing probe and the metallic vessel wall. A high frequency sine-wave is applied between the probe and the vessel wall. A change of the medium level will induce a change in the current of the applied sine wave. From Z=1/2pfc, when the capacitance in the vessel increases, impedance will decrease and current will increase. Vice-versa, when the capacitance in the vessel is small, the impedance will increase and current will decrease accordingly.
Technical Spec
| Probe Material | 304 or 316 stainless steel |
|---|---|
| PFA for aggressive media | |
| Input Voltage | 18-30Vdc (12-36Vdc for ATEX version) |
| Output | 4-20mA |
| Local Display | LCD |
| Options | ATEX versions |
| High temperature versions | |
| Cable Versions |
Advantages
- Suitable for high temperature, high pressure and corrosive environments
- Not affected by noisy, dusty, misty environments or changes in temperature
- No blind distance, ideal for different tanks
- Economic for large tanks
- 4~20mA output compatible for most control systems and meters
