Type 3311 / 846 Electro-Pneumatic Transducer

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Input Signal: 4-20 mA DC, field adjustable split ranging
Output Signal: 
Standard Performance:  0.2 to 1.0 bar (3 to 15 psi). Rangeability between 0.1 to 1.2 bar (1 and 18 psi)
Multirange Performance:  0 to 1.2 bar (0 to 18 psi),  0.4 to 2.0 bar (6 to 30 psi), and  0 to 2.3 bar (0 to 33 psi) nominal ranges. Actual rangeability available between 0.03 to 2.3 bar (0.5 and 33 psi)
Action:  Direct (increasing input signal increases transducer output) (Minimum span, 6 psi) or  Reverse (increasing input signal decreases transducer output) (Minimum span, 11 psi)