In hazardous / explosive gases?
FCIs Thermal Technology is safe to use in near all flammable and explosive liquids and gases, including Hydrogen. Both flowmeters and switches are ATEX rated EExd.

Read more about the projects utilizing FCI ST98 Flowmeter:
• Thermal Oxidizer Gas Flow Monitoring (Pharmaceutical)
• Ozone Flow Monitoring (Water & Wastewater)
• Aeration Basin Air Flow Monitoring (Water & Wastewater)

The FCI ST98 Flowmeter is an accurate, easy to install, no moving parts solution for measuring and controlling Compressed Air, Nitrogen, Hydrogen and Biogas. flow.

Read more about other FCI Flow Meters and Flow Switches.

A typical flow element configuration uses two RTDs (Resistance Temperature Detectors), sheathed in thermowells, separated by a gap. Heat is applied internally to one RTD, creating a differential temperature between the two. This differential temperature is greatest at no flow conditions and decreases as flow increases, cooling the heated RTD.

This differential is electronically converted into an electrical signal that can be used to trip a relay in flow or interface switch applications.

Read in details about Thermal Dispersion in our training paper and check its advantages.

FCI is measuring the cooling rate of the Gas molecules passing the flowsensor tubes. How much the sensors are cooled depends on the actual density times the actual velocity of these gas Molecules. So if multiplied by the internal pipe diameter FCI gives a direct Mass flow measurement.

Thermal Dispersion technology utilizes the relationship between flow rate and cooling effect for direct measurement of mass flow.

With no moving parts and minimal invasiveness, Thermal Dispersion is ideal and widely applied in air and gas applications, and provides a highly repeatable and accurate measurement.