YOKOGAWA Hamilton Dissolved Oxygen Sensors

The measurement of Dissolved Oxygen is one of the key analysis methods to monitor, but most users complain of unreliable sensor performance, high maintenance requirements and therefore high costs or a short lifetime. The Hamilton Dissolved oxygen sensors are designed to meet the severe requirements of the Biotechnology industry in terms of long term stability and low maintenance.

Most low maintenance dissolved oxygen sensors operate on the principle of the reduction of oxygen at the surface of a noble metal electrode, the cathode, but this design can exhibit problems during calibration including interference from other substances. In the Oxygold and Oxyferm electrodes, the sensor is covered with a gas permeable membrane to address these problems. The unique technology of the membrane is the real secret to achieving the desired quality of DO measurement. The Dissolved Oxygen sensor is a membrane covered polarographic sensor. Normally these sensors utilize TEFLON or FEP material, which features high selectivity towards Oxygen. For Biotechnical applications this material is not suitable due to mechanical deformation of the membrane in the vigorously agitated reactors or during steam sterelization. Other models use silicone rubber which has excellent elastic properties but poor oxygen selectivity. The Oxygold and Oxyferm feature a laminated membrane with a thin layer of TEFLON for high selectivity and fast response, silicone rubber for elasticity and steel mesh for mechanical stability.

Features
Optiflow mechanically robust membranes that combine fast response, low flow dependance and an ability to function under harsh application conditions.
Rapid stabilisation to minimise maintenance time.
Ruggedised design guarantees stabillity even after numerous sterilisation cycles.
Low limit detection down to 2 ppb.
Sterilisable and autoclavable
Can be mounted inverted
ATEX certified sensors and fittings
Certificate downloadable from www.hamiltoncompany.com