CCLD pressure sensors are charge sensors (also refereed to as IEPE sensors) with integral preamplifiers that have output signals in the form of low impedance voltage output.
Most CCLD pressure sensors are hermetically sealed to protect against environmental contamination, they have low susceptibility to radio frequency, electromagnetic radiation and low a impedance output due to the built-in amplifier. This allows the use of inexpensive, and long, coaxial cables.