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.
â The RTD measures changes in temperature according to changes in the sensor's resistance. It operates on the principle that electrical resistance of certain metals change in a predictable way-depending on rise or fall in temperature. Sensors can be made from platinum, nickel or copper and eachmetal varies in sensitivity, accuracy and temperature.