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Thermal Flow Sensors
Thermal flow sensors use thermal dispersion flow sensing technology to determine the mass flow rate of liquids or gases by measuring the rate at which heat is conducted away from the sensor tip. Output options for flow or temperature indication include switch, frequency, or analog signals.
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Thermal flow sensors use thermal dispersion flow sensing technology to measure the mass flow rate of a liquid or gas. They 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.
For part listing and specifications, go to Shop Now
ProSense FTS Series
ProSense FTS series thermal flow sensors provide a cost‑effective solution for monitoring flow velocity in water, glycol solutions, or air where high accuracy is not required. With no moving parts, they offer a reliable alternative to mechanical flow switches and other flow‑sensing technologies. When pipe diameter is entered, the FTS series can also calculate and display volumetric flow for convenient gpm or cfm indication.
- Measuring range up to 9.85 ft/s (liquids) or 328 ft/s (air) for a wide range of monitoring applications
- Supports volumetric flow indication in pipe sizes up to 16 inches internal diameter when configured with pipe size
- By eliminating the need for a separate temperature sensor, they simplify installation and wiring while reducing overall system costs.
- 100mm or 200mm probe lengths accommodate various installation depths and pipe diameters
- 4-digit, two-color alphanumeric display with pushbutton setup provides clear indication and simple configuration
- Two outputs selectable for switch, frequency, or analog signals support flexible control and monitoring options
- IP65/67 protection rating ensures reliable performance in industrial environments
Starting at
(FTS100-1001)
Wenglor weFlux2 Series
New!
Wenglor weFlux2 insertion-style thermal flow sensors measure flow velocity and temperature in closed-pipe systems. They detect changes in heat dissipation within the flowing medium to deliver accurate, reliable readings regardless of mounting orientation or flow direction. IO‑Link models include parameter handling that simplifies commissioning, device replacement, and integration into modern automation systems.
- Suitable for aqueous liquids with flow velocities from 10 to 400 cm/s (0.33 to 13.12 ft/s)
- Two selectable outputs (switch, analog, or IO-Link depending on model) support versatile control and monitoring options
- By eliminating the need for a separate temperature sensor, they simplify installation and wiring while reducing overall system costs
- Pressure ratings up to 100 bar (1450 psi) for demanding industrial applications
- 75, 100, and 200 mm probe lengths support a wide range of installation requirements
- Laser-welded 316L stainless steel housing with IP68/IP69K protection ensures reliable performance in harsh washdown environments
Priced at
(FXFF901)
