The Neutronics Model SCA Single-Channel Gas Detector Control Unit is a wall mounted monitoring and control unit designed for installation in a safe area where there is no risk of the presence of potentially explosive gases. It can be used with the following detector configurations:
- Fitted with an integral CO2 (IR), oxygen or toxic gas sensor for safe area use only
- Connected to a remote CO2 (IR), oxygen, or toxic gas detector head for safe area use only
- Fitted with an internal (or external) safety barrier and connected to a remote certified intrinsically safe (Ex ia) flammable, oxygen, or toxic gas detector head located in a hazardous area
- Connected to a remote flameproof (Ex d) certified flammable, oxygen, or toxic gas detector head located in a hazardous area.
For applications where the fixed gas detector is located in a hazardous area, a safety barrier must be used to limit the maximum voltage and current under a fault condition and prevent an incendive spark. Where suitable, the internal safety barrier can be installed in the control unit. This can be done at the time of manufacture or at a later time if the system is extended by the installation of an additional detector.