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

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

• Digital 300 Vue "B" Series Low Flow -

  A high-accuracy, digital mass flow controller or meter with options for both a local touchscreen display and a remote display.​
  

• Digital 300 "A" Series Low Flow -

  A high-accuracy digital mass flow controller or meter with an IP-67 option that offers protection from both dust and water​ makes it ideal for challenging environments.

• ​HFM-200 / HFC-202 -
  A general purpose mass flow controller or meter with a time-tested reputation for reliability and stability.

• HFM-300 / HFC-302 -
  A fast-response analog mass flow meter / controller using a constant temperature differential​.

• HFM-200 LFE
  A thermal mass flow meter with low pressure drop. One of our most popular flow meters due to its exceptionally sable performance​.​

​​Medium Flow Products (0-25 slm to 0-1000 slm)​

• Digital 300 Vue "B" Series Medium Flow
  
• Digital 300 "A" Series Medium Flow
  
• HFM-201 / HFC-203
  
• HFM-200 LFE
  
• HFM-301 / HFC-303​

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

• Digital 300 Vue "B" Series High Flow
  
• Digital 300 "A" Series High Flow
• HFM-200 LFE​
• HFM-205 / HFC-207
• HFM-305 / HFC-307​​​​​

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:

• Full Scale Range and Gas Type
• Reference Conditions (Temperature & Pressure)
• Upstream & Downstream Pressure (Only applicable to Flow Controllers)

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.

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Example Order for a Thermal Flow Meter:

HFM-D-300B(H) Digital Thermal 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

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:

• Calibration
  
• Thin Film Deposition
• Air Sampling
  
• Thermal Spray
  
• Food & Beverage
  
• Semiconductor & Photovoltaic Processes
  
• Power Generation
• Gas Blending
• Check out o​ur Product Video on Ratio Control
• High Throughput Leak Detection
• Analytical Instrumentation
• Oxygen Delivery System
• Biopharmaceuticals