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TopTrak 826/827 High-Flow Gas Mass Flow Meter with Digital Display

Brand: Sierra Instruments

Sierra Instruments 826/827 High-Flow TopTrak accurately measures the mass flow rate of most clean gases.

Available in flow ranges from 0 to 75 slpm up to 0 to 175 slpm. Wetted surfaces are anodized aluminum with Viton "O"rings, and all are corrosion-resistant.  

The 826/827 measures and displays the mass flow rate directly in sccm or slpm. The instrument is available with our without a digital display, which is tiltable over 180° for easy viewing and can be removed for remote panel mounting. A 0-5 Vdc or 4-20 mA output signal linearly proportional to gas mass flow rate is provided for recording, data-logging or control. A 9-pin "D" connector for the output signal, input power, and remote display drive is standard.  

TopTrak's performance is unsurpassed: accuracy is 1.5% of full scale over a wide temperature and pressure range, and time response is two seconds to within 2% of final flow. This device is widely used in a variety of flow validation and calibration applications, by dozens of instrument OEMs, and in a multitude of laboratory, test and analytical operations.
Features
  • Direct monitoring of mass flow rate eliminates need for ancillary pressure and temperature sensing
  • Digital display of mass flow rate on flow body or remote version for panel mounting
  • Aluminum flow body accommodates most gases in flow rates up to 175 slpm
  • Electronic output of mass flow rate available for control or data-logging
  • Large, straight sensor tube reduces contamination and maintenance down-time
  • Platinum sensor eliminates zero-drift and ensures long-term repeatability
  • Primary standard calibration ensures starting point accuracy and NIST traceability
  • CE Approved

Specifications

Accuracy

  • ± 1.5 % of Full Scale Under Calibration Conditions

Approvals & Certifications

  • CE

Display

  • 3.5-Digit LCD

Enclosure, Body Material

  • Anodized Aluminum

NACE & NIST

  • NIST

NPT Connection

  • 1/2” NPT Female
  • 1/4” NPT Female

Power Supply

  • 12-18 Vdc, 15 Vdc Nominal, 100 mA - Max.
  • 24 Vdc Optional

Repeatability

  • ± 0.5 % of Full Scale

Tube Connection

  • 1/4” Compression Fitting
  • 1/8” Compression Fitting
  • 3/8” Compression Fitting

VCR / VCO Connection

  • 1/4” VCO
  • 1/4” VCR

Wetted Materials

  • 316 Stainless Steel
  • 4079 Kalrez O-Ring Option
  • Anodized Aluminum
  • Neoprene O-Ring Option
  • Nickel Plating
  • Viton O-Ring
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