Features: oxygen pressure range 2 mbar - 3bar zirconium dioxide (zro2 ) sensing elements non-consumption technology integral heating element no need for temperature stabilisation no reference gas required high accuracy linear output signal operates with external interface boards Specifications Heater supply* Full porous cap 4.35v dc +/- 0.1v dc (1.85a) Stand by 2 v dc (0.85a)