... Differential Pressure Controller:Power: 24VAC, 1A, 50/60Hz, Degree range: 8 to 60PSI (55 to 414kPa), Operation differential pres Differential Pressure ... the coverSimilar to Johnson P74JA floating differential pressure controlFunction ProductP74JA differential pressure controlPower24VAC, 1A, 50/60HzDegree range8 to 60PSI ... or installed on special supporting bracket Differential Pressure Controller