The Transducer Cylinder is included in the package for convenience. It is recommended to set the temperature of the transducers to -40°C~85°C to ensure reliable operation. The transducers are capable of operating well at 10V~15V supply voltage. In order for the transducers to function properly, the 4 pins must be connected. This transducer can handle pressures up to 100 Psi. This device must work at 0V voltage from the transducers. In order to keep the transducers at the temperature they are rated for, the DC voltage needs to be 12V.