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.
embedded RTD's (resistance temperature detectors) or by measuring the winding resistance. The latter method is dated and is not used with newer machines; new machines have RTD's to measure winding temperatures and RTD's are being phased in to replace old temperature measuring methods as older machines are rewound or uprated. The