The 51B13TCA2BF500 Single-end Pressure Switch is ranged for 1000 Torr, has an 4 VCR-style fixed male fitting, 20-30 VDC input voltage, energizes with pressure below the set point, 2 foot shielded cable with flying leads for electrical connection, and accuracy of 0.5% of Full Scale. It offers accurate and reliable protection for vacuum vacuum/pressure processes for applications where a DC signal output is not required. It is referenced to vacuum.