MATHESON Flow Meters
An Industry Leader for over 80 years
In 1926 MATHESON Gas Products became the first company to offer a reliable source of high quality scientific gases and equipment. From the start, MATHESON asserted its leadership by understanding specialty gas applications and providing products specially designed for these applications. Some of MATHESON’s more notable accomplishments include the development of the lecture bottle, now used by virtually every major college and university in the world, and the supply of ultra pure gases that served as standards for the first gas chromatographs.
Listed below are just a few of the most popular Matheson flow meter products. Buse Scientific is able to supply the complete range and we would suggest that you contact us with your specific needs.
Matheson’s FM-1050 Series Flowmeters provide the most accurate indication and precise control of fluids available for a wide range of applications. This versatile meter is functionally and dimensionally interchangeable with other current designs while incorporating many innovative features.
All FM-1050 Series glass metering tubes have integral float guides to ensure a guaranteed ±5% (±1% with optional calibration) of full scale accuracy. Both glass and stainless steel floats are included (except for the E910 tube, which includes a glass float only). The meters are available in a range of 150mm reference indicating scales. Be sure to request calibration data for the gas(es) you will be measuring (if no gas is specified, Air calibration data will be supplied).
Standard with this series is the uniquely designed Tube-Cube®. The “cube,” a unitized tube holder, aligns the tube quickly and easily for simple tube installation or replacement. The Tube-Cube® provides protection during handling, reducing chipped tube ends, broken tubes and misalignment. The 1.5 X scale magnification lens allows for a more accurate reading. End seals in the FM-1050 are direct acting and nonrotating for fast alignment and convenient service accesss.
Valve Options
• Utility (six-turn) valve for those who desire control as well as indication
• High accuracy (fifteen-turn) valve, for very precise control and repeatability
• No valve for those who just want indication
• The valve should be on the inlet when the gas is to be used at atmospheric pressure.
• The valve should be on the outlet if there is a vacuum or varying pressure downstream.
Applications
Typical applications include:
• Flow measurement of purge gases
• General laboratory or instrument flow monitoring
• Flow measurement of calibration standards used in environmental monitoring
Design Features
• High resolution 150mm scale length
• Precision tapered, fluted metering tube
• Low pressure drop for increased available flow rates at low feed pressures
• Standard front panel mounting requires minimum hardware -easy installation, quick access
• Available utility and high precision metering valves do not require special fittings
• Simplified, direct acting, nonrotating compression plug for quick and easy tube sealing
Materials of Construction
• Wetted End Blocks, Fittings and Internal Parts: Brass and chrome plated brass
• Seal Materials: Buna-N
• Side Plates: Painted aluminum
• Metering Tube: Borosilicate glass enclosed in Tube-Cube® holder
• Piping Connections: 316 stainless steel
• Float Materials: Black glass and 316 stainless steel
• Scale: Ceramic ink on glass tube, length 150mm
Accuracy
• Accuracy: ±5% of full scale flow rate
• Optional Accuracies: ±1% of full scale for reference scales only (need to purchase when buying rotameter)
• Repeatability: 0.25% of scale reading
Specifications
• Pressure Rating: 250 psig maximum
• Temperature Rating: 250°F maximum
• Range: 10 to 1, i.e., 100% to 10% of full scale mm or linear flow with conversion curves and/or factors
• Shipping Weight: 1 lb
Rotameter calibration charts (FM-1050) available on request
Correction Factors
Rotameter Pressure Correction Factors
Rotameter Temperature Correction Factors
Engineering Drawings
Engineering Drawings, Rotameters
Instructions
The FM-1000 Series Flowmeters incorporate the innovative design of the FM-1050 in a more compact unit without reducing standards of accuracy. This is the rotameter of choice for those interested in conserving space. The same ±5% full scale accuracy is guaranteed for the 65mm scale length of these flowmeters.
Unlike the FM-1050 series which uses reference scales, the FM-1000 Series flowmeters are direct reading for air, and are available in either English or Metric units. Choose between a black glass or a stainless steel float. These flow tubes are fluted to provide better float stability.
The FM-1000 Series glass metering tubes are enclosed in the Tube-Cube®. Protection of the tube, magnified tube scale for easy reading and alignment during replacement are afforded with this unitized holder. Integral fluted float guides for optimum float performance are standard with all tubes unless otherwise specified.
Want to use your air direct read scale with another gas? You can use the Gas Correction Factor Chart to get an approximate flow.
Valve Options
• Utility (six-turn) valve for those who desire control as well as indication
• High accuracy (fifteen-turn) valve, for very precise control and repeatability
• No valve for those who just want indication
• The valve should be on the inlet when the gas is to be used at atmospheric pressure.
• The valve should be on the outlet if there is a vacuum or varying pressure downstream.
Applications
Typical applications include:
• Flow measurement of purge gases
• General laboratory or instrument flow monitoring
• Flow measurement of calibration standards used in environmental monitoring
Design Features
• Rugged, compact design
• Precision tapered, fluted metering tube
• Tube Cube® unitized glass tube holding assembly
• Reflective plastic background and 1.5 X magnification lens for excellent readability
• Safety blow-out back panel
• Full 10 to 1 (100% to 10% full scale) metering range
• Low pressure drop for increased flow rates at low feed pressures
• Easy installation and quick service access
• Optional utility and high performance valves do not require special fittings
• Corrosion resistant options: all wetted parts of 316 stainless steel or Monel with Viton or Teflon seals
• Custom scales and flow curves available
Engineering drawings available
Materials of Construction
• Wetted End Blocks, Fittings and Internal Parts: Brass and chrome plated brass
• Seal Materials: Buna-N
• Side Plates: Painted aluminum
• Metering Tube: Borosilicate glass enclosed in Tube-Cube® holder
• Piping Connections: Brass
• Float Materials: Black glass and 316 stainless steel
• Scale: Ceramic ink on glass tube, length 65mm
Accuracy
• Accuracy: ±5% of full scale flow rate
• Optional Accuracies: ±5% of full scale Certificate of Accuracy (direct read scales) (need to purchase when buying rotameter)
• Repeatability: 0.25% of scale reading
Specifications
• Pressure Rating: 250 psig maximum
• Temperature Rating: 250°F maximum
• Range: 10 to 1, i.e., 100% to 10% of full scale
• Scale Readings: Direct reading-air (special other scales available)
• Shipping Weight: 1 lb
Correction Factors
Rotameter Pressure Correction Factors
Rotameter Temperature Correction Factors
Rotameter Gas Correction Factors
Engineering Drawings
Engineering Drawings, Rotameters
Instructions
The MATHESON 829 flow controllers are among the most sophisticated flow sensing transducers available. These are digital/analog instruments, accurate, repeatable, and customizable, designed to be used in a variety of non-corrosive gas applications. All flow data visible on one LCD screen (setpoint, mass flow, volumetric flow, pressure, temperature).
Features
• 98 gases/mixes preloaded
• Gas composition firmware with the ability to make your own mixes
• These units are incredibly fast and inherently linear, offering a typical 100 ms response time
• No warm up time
• Accuracy is superior, at ± 0.8% reading, +0.2% full scale
• 200:1 turndown ratio
• Tunable P & D to fine tune instrument's response speed
• Multiple digital and analog inputs and outputs
• Built in Totalizer function
• Built in Batch function
• Wall transformer included
• NIST traceable
MATHESON affords the user the ability to mix and match components to achieve a customized system. Listed below are the individual model numbers for the transducer assemblies for MATHESON’S Mass Flow Controllers. Can be used with the 8284A Four Channel Dynablender Plus, or 827A Single Channel Controller, or as a standalone.

Gases
Matheson can preset the gas for the 829 series flow controller. The user can easily change the gas by selecting any of the 98 preloaded pure gases and mixtures or they can configure their own mixes by using the included firmware.
Other Available Gases include:
• Laser gases
• Bioreactor gases
• Breathing gases
• Fuel gases
• Welding gases
• O2 Concentrator gases
• Stack gases
Materials
• 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber,
Glass Reinforced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum,
Gold, Brass, 430FR Stainless Steel, Silicon, Glass.
Specifications
• Cable Connector: RJ-45
• Minimum Differential Pressure: 1 psid
• Maximum Operating Pressure: 150 psig
• Temperature Range: 32° to 122° F (0° to 50° C )
• Accuracy: +/-0.8% reading, +/-0.2% full scale
• For non-corrosive gases only
<iframe width="440" height="330" src="https://www.youtube.com/embed/i9UC9cmoWg4" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>