Which items are included in a standard visual inspection of a darkroom environment?

• A. Visual inspection; CO2 sensor
• B. Visual inspection; thermometer; hygrometer
• C. Visual inspection; stroboscope; spectrometer
• D. Visual inspection; weight scale

Answer: (B)

Environmental conditions in the darkroom are routinely checked during a visual inspection because they directly impact film quality and chemical processing. A thermometer and hygrometer are included because stable temperature and humidity are essential for preserving film emulsion and ensuring consistent developer activity; fluctuations can cause film fogging, emulsion issues, or variability in processing results. Other devices like a CO2 sensor focus on indoor air quality rather than the film environment, and a stroboscope or spectrometer relate to light timing or spectrum rather than routine darkroom conditions. A weight scale serves no purpose in this inspection. Therefore, the combination that includes a visual check along with a thermometer and hygrometer best fits standard practice.