Shallow Water Micro-sensor for Dissolved Hydrogen
For very fast depth profiling with probe systems

The amperometric micro-sensor for shallow water has been developed for the fast insitu depth profiling of dissolved hydrogen with probe systems in natural waters and oceans. Because of the partial pressure of the gaseous H2 , the analyte is separated by permea-tion through the membrane. Inside the sensor the hydrogen reacts electrochemically at the working electrode. This causes a current corresponding to the partial pressure of the dissolved hydrogen. 

The sensor has a very short response time of approx. 2 seconds for t 90% and streaming as it is well-known from all the other membrane covered electroche-mical sensors is not necessary, so that profiling with very high local resolution is pos-sible. Both turbid and coloured solutions do not interfere with the signal. For measuring the hydrogen concentration the sensor has to be combined with a temperature measure-ment.

The hydrogen micro-sensor is available for insitu measurements of depths of up to 100m and as laboratory version. All sensors are delivered with sensor slope, temperature compensation data and mathematical formulas for calculating the hydrogen concentration. The exchange of sensor heads is very easy and could be done by the customer itself. The alternative exchange tip for dissolved oxygen extends the sensors flexibility.

Technical data of Shallow Water Hydrogen Micro-sensor: