max. depth 100m
The AMT DO shallow water sensor is a galvanic micro-sensor that has been developed for fast in-situ profiling of dissolved oxygen with CTD probes to depths of up to 100 m. Due to the partial pressure of the gaseous O2, the analyte permeates through the membrane. Inside of the sensor the oxygen reacts electrochemically at the working electrode. This causes a current corresponding to the partial pressure of the dissolved oxygen.
The sensor has a very short response time of down to some hundred milliseconds for t90%. Streaming of the membrane as it is well known from all the other Clark-type oxygen sensors is not necessary. Therefore, profiling and stationary measurements become possible with a very high temporal and spatial resolution.
The sensor has a limited lifetime of 6 to max. 24 months. Since the membrane and electrolyte cannot be exchanged, the sensor has to be replaced.
Technical data:
- Pressure resistance: 100 dbar
- Measuring range: 0…200% saturation
- Accuracy: ± 2% measuring value
- Resolution: 0,1%
- Response time: down to 200 ms
- Principle: galvanic, membrane covered micro-sensor
- Material: Titanium / glass
- Dimensions: 24 mm Ø, 87 mm lenght
- Used for: CTD48, CTD48M, CTD48c,CTD48Mc, CTD75M, CTD90, CTD90M, CTD115M
