Thermal Mass Flow Meters and Controllers for Various Flow Ranges​​​​

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Teledyne Hastings Instruments brings decades of experience to offer a full line of thermal mass flow meters and controllers. Our products provide solutions for a wide range of app​​lications which include high and low flow ranges, corrosive gases and low dP requirements. With the assistance of our experienced application engineers and global sales network, we will help you find a reliable, repeatable, and durable solution for applications in both laboratory and industrial environments. Your needs can be met by using quality flow instruments designed and manufactured by Teledyne Hastings​.

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All Teledyne Hastings mass flow meters and controllers are configured for your specific conditions. You can begin selecting a flow instrument by finding what range below your application fits into. Solve your application challenges with our trusted line of thermal mass flow meters and controllers. If you require any assistance, please feel free to​ ​contact our experienced application engineers for assistance

Flow Controller

​​Low Flow Products (0-5 sccm to 0-25 slm)

Flow Controller

High Flow Products (0-1000 slm to 0-15,000 slm)​​​​


Picking an Instrument

All Teledyne Hastings mass flow controllers and meters are configured for your specific conditions to give an easy-to-use flow instrument that provides an accurate flow measurement. To see available options, refer to the back section of each product bulletins. Some basic considerations when choosing a flow instrument include:

While there are additional factors that should also be considered, such as communication, pressure drop and ambient temperature, these three factors are a great place to start when determining which flow instrument is suited to your application​.

If you need help converting mass flow into volumetric flow or converting it into different units, then Teledyne Hastings has developed a thermal mass flow calculator to help determine your new flow rate. In standardized volumetric flow units (sccm, slm, scfm,), the reference conditions, or “STP" temperature and pressure, define the amount of gas by determining the number of molecules using the Ideal Gas Law. In many cases, the selected reference conditions are 0°C & 760 Torr. However, other reference conditions are also used, such as 25°C & 760 Torr, or 70°F & 760 Torr.

Example Order for a Thermal Flow Meter:

HFM-D-300B(H) Digital Thermal mass flow meter 
FS Range: 1 SLM Natural Gas & Compressed Air (2 Calibrated Gas Records)
STP: 0° C and 760 Torr
Output: (01) 0-5 vdc (Standard) 
Fittings: (02) 1/4" Swagelok (Standard) 
Working Pressure: (01) 500 psig (Standard) 
Calibration Records: (02) 2 Calibration Certificates
Digital: (01) RS232 (Standard) 
Calibration Type: (01) NIST 5 Point (Standard) 
Display: (01) Optional Touch Screen Display (Standard) 

What We Offer

  • Expert first contact
  • Fast and easy product evaluation
  • Customized solutions
  • Design-in support
  • Lifetime application support

Key Applications

Teledyne Hastings has used our 75 years’ worth of experience to create  application notes for our customers. These are valuable technical resources that go into detail about how our flow instruments can be used in various applications. We also have other valuable technical resources like our mass flow glossary, webinars and product videos. Some of our key applications include the following:

​Frequently Asked Questions

What’s the difference between a thermal mass flow meter and mass flow controller?

A thermal mass flow meter measures flow using a thermal flow sensor but does not include a proportional control valve and does not control gas flow. While a controller will both measure and control gas flow, according to a command signal (setpoint). For accurate flow control, the controller measures and adjusts the gas flow using a precise, proportional control valve to maintain stable control of the flow rate based on the readings from the heated sensor.

What does a mass flow controller do?

Mass flow controllers are instruments that measure and control the flow of gas in reference to a specified flow rate. When adjustments in gas flow are required to maintain that rate, the feedback from the sensor is used to create an electronic signal to send to a control valve. A controller is calibrated for the flow range over-which they maintain control. A controller is often used for process control when accurate measurement and flow control over a process is required.

Are thermal flow meters gas specific?

A thermal mass flow meter is built for a user’s specific operating conditions. Teledyne Hastings' thermal flow meters are thermal based, so measurements are gas specific. For example, there would be a difference in heat conductivity between natural gas vs compressed air. Our controllers are built to cover a user's flow range, upstream & downstream pressure conditions and gas type. 

​What does SCCM stand for?

SCCM stands for Standard Cubic Centimeters per Minute. This is a unit of measure for volumetric flow. In standardized volumetric flow units, the reference conditions, or “STP" temperature and pressure, define the amount of gas by determining the number of gas molecules using the Ideal Gas Law.