All vessels fitted with IGS system MUST have a complete spare IGS oxygen (O2) analyser unit. It is Strongly Preferred that this spare IGS O2 analyser is permanently fitted as an additional IGS O2 analyser to serve as a back-up in case of failure of the main IGS O2 analyser.
- Similar features to TB-IIS
- Comes with Selector Switch, interchangeable between 2 Oxygen Analyzer
- Can be installed in-line with existing Oxygen Analyzer unit