What components make up the STYX module?

• A. Infrared sensors, optics, final filtration, control solenoid valves and calibration data circuitry
• B. Microprocessors, memory, display, and keypad
• C. Infrared sensors, UV sensors, final filtration, and calibration data circuitry
• D. The sampling probe, network switch, and alarm relay

Answer: (A)

The STYX module is defined by its infrared sensing and the immediate hardware that supports reliable measurement. Infrared sensors actually detect the target gas by measuring how it absorbs IR light at specific wavelengths. The optics portion ensures the IR beam is properly directed and focused through the sample path. Final filtration protects the sensors from particulates and contaminants that could skew readings. Control solenoid valves manage the sampling flow, isolate the sensor during operation, and help control the measurement cycle. Calibration data circuitry stores and applies calibration coefficients so readings stay accurate over time.

Options that describe a user interface (microprocessors, memory, display, keypad), a different sensing method (UV sensors), or external field components (sampling probe, network switch, alarm relay) don’t capture the essential sensing stack and calibration hardware that define the STYX module.