PMS Instrument Company - Manufacturer of pressure chamber instruments for measuring plant water potential and irrigation scheduling. Contains product information as well as tutorials on using a pressure bomb. PP Systems - Manufacturer of portable photosynthesis/respiration measurement instrumentation, CO2 and H2O Infrared Gas Analyzers for lab and field, portable spectrometer, and environmental sensors. ADC BioScientific - Manufacturers of instrumentation for measuring photosynthesis, transpiration, chlorophyll fluorescence, sap flow, and gas exchange. Walz - Producer of sophisticated photosynthesis measuring systems. The product line ranges from PAM Chlorophyll Fluorometers to measuring systems of plant gas exchange for physiological and ecophysiological research. CID, Inc. - Manufacturers of portable, photosynthesis analysis systems and miniature spectrometers. EARS Plant Photosynthesis Meter - Specifications and applications of the EARS-PPM, a modulated, saturation pulse chlorophyll fluorometer. Hansatech Instruments Limited - Manufacturers of oxygen electrodes and chlorophyll fluorescence systems for the measurement of cellular respiration and photosynthesis in the field or laboratory. LI-COR Environmental - Manufacturer of electronic instrumentation for environmental, agricultural and ecological research. Apogee Instruments, Inc. - Manufacturer of products used to measure radiation, leaf temperature, chlorophyll concentration, air and soil temperature and barometric pressure. Physiological Ecology Equipment Manufacturers - Links to suppliers of equipment used by ecophysiologists.