Hansatech Instruments Limited - Specialists in the manufacture of scientific instruments for the measurement of cellular respiration and photosynthesis in the field or laboratory.

ADC BioScientific - Manufacturers of photosynthesis, transpiration, chlorophyll fluorescence, sap flow, oxygen and carbon dioxide gas exchange instrumentation.

Tissue Quick Plant Laboratories, TQPL Supplies. - Supplies worldwide to plant tissue culture and orchid industry, autoclavable aseptic venting technologies in PTFE, plant culture containers and specialist orchid media.

Apogee - Information about products used to measure radiation and leaf temperature, ordering information and research and development being undertaken.

Conviron - Product and sales information and profile of a company which manufacturers plant growth chambers.

Lotus Tech - Catalog of research chemicals including both synthetic and herbal isolates. Not for human consumption.