499A TrDO sensors for detection of dissolved oxygen traces

499A TrDO sensor is designed for measurement of residual level (ppm — one part in a billion) of the dissolved oxygen in steam turbosets and in high-purity cooled water. 499A TrDO model is amperometric sensor coved with membrane. Sensor consists of gas-permeable teflon membrane extended on a golden cathode. Internal circuit is closed on a silver anode and electrolyte solution. 499A TrDO model sensor is supplied with watertight Variopol (VP) socket.