Industrial Mass Flow Controller (featuring SmartTrak capabilities) - MaxTrak® 180

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Industrial Mass Flow Meters and Controller

MaxTrak® Model 180 Industrial Instruments with NEMA 6 / IP67 Rating
MaxTrak® is a family of industrial gas mass flow instruments from the company that has been a trusted name in industrial thermal mass flow meters for decades—Sierra Instruments. MaxTrak® will measure and control any clean, dry gas mass flow from 10 to 1000 SLPM, with lower flows and higher flows available upon request.

  • Industry's only NEMA 6/IP67 industrial MFC provides wash down protection eliminating secondary enclosures
  • Measure & control gas mass flow rates up to 1000 SLPM - Sierra offers other models up to 100,000 slpm & higher (meters only)
  • Accuracy: +/- 1% of Full Scale
  • Repeatability: +/- 0.2% Full Scale ensures a stable process even under changing conditions
  • Dial-A-Gas® lets you select from up to 10 gases in one instrument, creating great flexibility and reducing spares inventories
MaxTrak® 180 Industrial Mass Flow Controller - featuring SmartTrak capabilities

MaxTrak® 180 Industrial Mass Flow Controller - featuring SmartTrak capabilities

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Sierra Instruments Warranty & Support

Limited Warranty - Product - Liability for Repair and Replacement Only

All Sierra products are warranted to be free from defects in material and workmanship and will be repaired or replaced at no charge to Buyer, provided return or rejection of product is made within a reasonable period but no longer than one (1) year for calibration and non-calibration defects, from date of delivery. To assure warranty service, customers must register their products online on Sierra’s website. Online registration of all of your Sierra products is required for our warranty process. Register now at http://www.sierrainstruments.com/register. 

This warranty does not cover any damage or discoloration caused by corrosion due to gases, liquids, or any other source, nor does it cover normal wear of any seals in its products and with gases other than air, or unless otherwise specified in the contract. Such returns are contingent on Sierra's examination and reasonable satisfaction that any defects are covered by this warranty and that the Buyer has not returned the equipment in a damaged condition, due to any negligence, tampering, misapplication or product modification on the part of the Buyer or his agents. Sierra shall not be liable for installation charges, for expenses of Buyer for repairs or replacement, for damages from delay or loss of use, or other indirect or consequential damages of any kind.

Sierra extends this warranty only to Sierra products properly used and properly installed for the particular application for which intended and quoted, and this warranty does not cover products which have been modified without Sierra's approval or which have been subjected to unusual physical or electrical stress, alteration, or tampering, or upon which the original identification marks have been removed or altered. Whenever the design of the equipment to be furnished or the system in which it is to be incorporated originates with the Buyer, Sierra's warranty is limited specifically to matters relating to furnishing Sierra equipment free of defects in materials and workmanship and Sierra assumes no responsibility for implied warranties of fitness for purpose or use. Any replacement or repair shall be to Sierra's factory, unless otherwise directed. No items shall be returned for warranty repair without prior written authorization from Sierra.

Note: Sierra’s InnovaSwitch™ Flow Level Switches come with a two (2) year warranty with the above stipulations. 

Lifetime Limited Warranty on Patented DrySense™ Sensor Technology

In addition to Sierra’s standard one (1) year manufacturing warranty on all instruments produced, Sierra also offers a lifetime warranty on all DrySense™ sensors standard with Sierra models 640i, 780i, 640S, 780S, and 670S instruments sold after January 1, 2010.  This warranty does not extend to the Model 620S, the BoilerTrak™, the HT (High Temperature) 640S/780S sensor or the 780S UHP (Ultra High Purity) sensors. To assure warranty service, customers must register their products online on Sierra’s website. Online registration of all of your Sierra products is required for our warranty process. Register now.

Download Sierra Products Warranty Statement

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2 Year Warranty Coverage for Flow Switches

Sierra offers a two (2) year warranty coverage for our entire line of InnovaSwitch™ Flow Level Switches beginning July 1, 2010.

Technical Support

Chat with us or call (502) 266-6640.

Technical Details

Winner of numerous awards, Max-Trak® Model 180 instruments provide excellent accuracy and reliability, coupled with unsurpassed instrument stability, resulting from our patented inherently-linear body design, our advanced platinum sensor technology and a valve that is strong, flexible and forgiving.

Max-Trak® is well-suited for dirty industrial processes such as those found in metals and ceramics manufacturing, combustion control systems, chemical processing, pharmaceutical / biotech and the food and beverage industry where it outperforms the competition by meeting the rigorous water-resistant requirements of NEMA 6 and IP67. Model 180 gas flow meters and controllers can be used in a wide variety of process environments with optional 316 stainless steel flanges (ANSI or DIN) that compliment many other popular process fittings.

The extreme water-resistance, ease of installation, and rugged construction will give you confidence that Max-Trak® will continue to perform while the advanced features will provide you with information you can rely on for many years.

Electronic Mass Flowmeters & Mass Flow Controllers

Max-Trak® pressure insensitive mass flow controllers outperform all the competition. The Max-Trak® conforms to the more rigorous requirements of NEMA 6 and IP67. In addition, Max-Trak® controls gas mass flow rate from 10 to 1000 SLPM, with lower flows (to 2 SLPM full scale) available upon request. Since Max-Trak® is part of our leading edge 100 Series Digital family of mass flow controllers, it comes standard with Dial-A-Gas® multi-gas capability, both analog and digital communication, and a wide variety of field adjustable parameters.

The Max-Trak® provides excellent accuracy and reliability, coupled with unsurpassed instrument stability, resulting from a patented inherently linear design, advanced platinum sensor technology, and a valve that is strong, flexible and forgiving. The 0 to 200 SLPM version also features the only fully enclosed valve design to drastically minimize leak-in paths for MAXIMUM protection.

  • Industry's only NEMA 6/IP67 industrial MFC provides wash down protection eliminating secondary enclosures
  • Measure & control gas mass flow rates up to 1000 SLPM - Sierra offers other models up to 100,000 slpm & higher (meters only)
  • Accuracy: +/- 1% of Full Scale
  • Repeatability: +/- 0.2% Full Scale ensures a stable process even under changing conditions
  • Dial-A-Gas® lets you select from up to 10 gases in one instrument, creating great flexibility and reducing spares inventories
  • Operation at low differential pressures possible due to powerful valve design
  • Both digital and analog communication included
  • View and change the following functions in the field via RS-232 or Sierra's unique Pilot Module:
    • Gas type
    • Setpoint value
    • Setpoint source
    • Engineering units
    • Output signal
    • Valve state (open, closed or automatic)
    • Full scale value
    • Zero Value
    • Span Value
  • Multi-drop RS-485/MODBUS RTU; Add Compod for more robust features and easy networking
  • All stainless steel construction is suitable for any clean gas, even corrosives & toxics
  • Single sided power (24 VDC) reduces installation cost

Product Information

MaxTrak® Model 180 Industrial Instruments with NEMA 6 / IP67 Rating

MaxTrak® is a family of industrial gas mass flow instruments from the company that has been a trusted name in industrial thermal mass flow meters for decades—Sierra Instruments. MaxTrak® will measure and control any clean, dry gas mass flow from 10 to 1000 SLPM, with lower flows and higher flows available upon request.

MaxTrak is available with Dial-A-Gas®, capability through a remote pilot module or RS-232 computer interface to change flow rate, modify engineering units or re-configure the instrument. With the Pilot Module, the user can set zero, span and full scale for each of 10 different gases independently to accommodate unexpected application or system design changes.

Based upon Sierra’s successful SmartTrak® line of digital instruments, MaxTrak® adds rugged industrial packaging to popular premium features:

  • Dial-A-Gas® multi-gas capability
  • 316 stainless steel construction
  • 4 types of analog and 2 types of digital communication
  • a wide variety of field adjustable parameters
  • compact sizes to measure and control flow rates from 10 to 1000 SLPM (higher upon request)

Sierra’s digital communications solutions offer engineers and systems integrators, full system integration and networking capability with Sierra's mass flow controllers and meters. Digital communications solutions include: Modbus RTU. For enhanced Modbus networking capability, including two digital relays, totalization, inputs, and display, add our Compod™. Compod greatly simplifies basic flow control installations to permit networking of multiple instruments. This flexibility of communication features offers a turnkey solution for integration of Sierra's mass flow meters and controllers into any automation system or application.

Operating Principle

The MaxTrak Flow Sensing Principle

The operating principle of the MaxTrak instruments is based on heat transfer and the first law of thermodynamics. During operation process gas enters the instrument’s flow body and divides into two flow paths, one through the sensor tube, the other through the laminar flow bypass. The laminar flow bypass (often called LFE which stands for “laminar flow element”) generates a pressure drop, P1–P2, forcing a small fraction of the total flow to pass through the sensor tube (m1).

Two resistance temperature detector (RTD) coils around the sensor tube direct a constant amount of heat (H) into the gas stream. During operation, the gas mass flow carries heat from the upstream coil to the downstream coil. The resulting temperature difference (∆T) is measured by the MaxTrak microprocessor. From this, MaxTrak calculates the output signal. Since the molecules of the gas carry away the heat, the output signal is linearly proportional to gas mass flow.

Figures 1-2 and 1-3 show the mass flow through the sensor tube as inversely proportional to the temperature difference of the coils. The coils are legs of a bridge circuit with an output voltage in direct proportion to the difference in the coils’ resistance; the result is the temperature difference (∆T). Two other parameters, heat input (H) and coefficient of specific heat (Cp) are both constant. Through careful design and attention to these parameters, this output signal is made linear over the transducer’s normal operating range (Figure 1-4). As a result, the measured flow through the sensor tube is directly proportional to the gas flow in the main body.

In the MaxTrak mass flow controllers, the gas which flows through the monitoring section is precisely regulated by the builtin electromagnetic valve. The normally closed valve is similar to an on/off solenoid valve, except that the current to the valve coil, and hence the magnetic field, is modulated so that the ferromagnetic valve armature, or valve plug, assumes the exact height above the valve’s orifice required to maintain the valve’s command flow (set point). The result is excellent resolution.