Is the measured process media a liquid or a gas?Is the flow measurement occurring in a pipe or in an open channel?What is the the flow rate?How much does the flow vary?If liquid, is it clean or does it contain suspended solids or air bubbles?What accuracy is required?How much head loss by the flowmeter is permissible?Is the flow corrosive or erosive?What types of flowmeter technologies can be accommodated in the location?What types of post installation service is available in area?