Thermal flow rate sensors

26 companies | 48 products
Flow rate sensors
  • Category
  • Types
  • Technology
  • Other characteristics
  • Applications

Klixon is a world leader in the design and manufacture of air flow sensors. We build devices that are high-quality, dependable, and reasonably priced....


The VA 400 is a Thermal flow sensor with integrated digital display that has various parameters for compressed air resp. m³/h, l/min, (1000 mbar, 20°C)and case of gases Nm³/h,...

The VA 400 for consumption measurement of compressed air and gases in a robust housing with actual consumption in m³/h and counter in m³. Its special features includes a depth scale for accurate installation,...

The VA 420 is very easy and affordable to deploy, and the units are freely selectable through keypad m³/h, m³/min, l/min, l/s, kg/h, kg/min, kg/s, cfm. This apparatus showcases a high-measuring...

The VA 420 is a thermal flow sensor that is integrated with parameter of m³/hour and l/minute and a maximum pressure capacity of 1000 mbar for 20°C temperature in cases of compressed...


Solid State Flow Sensors

Designed to monitor for positive presence of cooling airflow, this velocity sensor operates on 5V DC. The sensor can be mounted on a board, in a socket, or hard-wired to a bracket. The SAF is an AMBIENT COMPENSATED device affording...


・SMD platinum thin film thermal sensors.


IST thin film mass flow sensors offer solutions for a wide variety of flow applications. The thin film and membrane technologies incorporate highly accurate temperature sensors and heaters as...

IST’s thin film MFS02 thermal mass micro flow sensor is ideal for small gas flow and differential pressure applications. The sensor features an ultra...


In the latest generation of Flow Sensors the ceramic sensor ist no longer out of the housing. If the setting of the sensor should be overridden, the teach-in button allows a comfortable adjustment. LEDs indicate the operating state...

Sensor and evaluation device in one housing

Stainless steel sensor head in different thread types (see table)

4-conductor cable, voltage 20-36VDC



How to choose this product


A thermal flow sensor uses a fluid's capacity to carry calories from a heating element to a sensing element to measure mass flow, which is proportional to the thermal transfer.


These devices monitor cooling and lubricating circuits and detect leaks and absence of fluid (for pump protection) in the beverage industry, metallurgy, the chemical and automobile industries, and in heating and air conditioning. Sensors are designed for particular fluids: water, oil, corrosive liquids or gases.


Thermal sensors measure the flow of homogeneous liquids and gases with very little energy loss. They have no moving parts, making them sturdy and reliable. An in-line sensor resembles a conduit section, while a threaded insertion model uses a clamp or a compression connector. Sensors are calibrated for volume rather than mass. They are suitable for measuring the flow of fluids of known specific heat and density.

Gas flow is measured by a hot wire or hot film sensor. The former consists of a heating wire placed tangential to the flow, whose rate is calculated on the basis of its cooling effect on the wire. The latter has a heating surface oriented in the direction of the flow. Upstream and downstream heat sensors measure the temperature difference and, thus, the flow rate.

How to choose

Choice will depend on fluid type, mounting configuration, measurement accuracy and type of signal or available ports.


- Low energy loss

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