C4 pathway A pathway of carbon fixation, found most commonly in tropical plants that have high rates of growth and photosynthesis and that are adapted to high temperatures, strong light, low carbon dioxide levels, and low water supply. Its importance lies mainly in its reduction of photorespiration.
PT 100 RTD means Resistance temperature detector(RTD) of platinum with 100 ohms resistance at zero degree centigrade.
What Is An RTD? Platinum Resistance Temperature Detectors (Pt-RTDs) are temperature sensors that have a positive, predictable and nearly linear change in resistance when subjected to a corresponding change in their body temperature.