Thermal Flow Sensors

ProSense FTS series thermal flow sensors use thermal dispersion flow sensing technology to measure the mass flow rate of a liquid or gas. Thermal flow sensors maintain a constant temperature difference between a heated element and a reference sensor. The flow rate is determined as the sensor reacts to the physical effect of a flowing medium conducting heat energy away from its tip. More heat is removed with a higher mass flow rate, requiring more power to maintain the constant temperature difference. The amount of power required to maintain the temperature difference is directly proportional to the mass flow rate of the fluid. The flow measurement is in units of velocity, which can be converted to a volumetric flow rate when multiplied by the cross-sectional area of the pipe.

ProSense FTS series thermal flow sensors offer a cost-effective solution for monitoring water, glycol, or air flow where high accuracy is not required. With no moving parts, they are relatively insensitive to changes in temperature or pressure and are a reliable alternative to mechanical flow switches and other flow sensing technologies.

• Measuring range up to 9.85 ft/s (liquids) or 328 ft/s (air)
• Measures media temperature in addition to flow
• 100mm or 200mm probe lengths
• 4-digit, two-color alphanumeric display
• Pushbutton setup
• Volumetric flow rate measurement in pipe sizes up to 16 inches ID (flow velocity measurement can be used in larger pipe sizes or other shapes)
• Two outputs selectable for switch, frequency, or analog signals
• IP65/67 protection rating