Sierra FastFlo™ 620S Insertion Thermal Mass Air Flow Sensor

The FastFlo™ 620S is an insertion thermal mass air flow sensor designed to give you a highly reliable, responsive and affordable mass flow measurement for light industrial applications where a NEMA 4X (IP65) enclosure is acceptable. This mass airflow sensor:

• Includes a compact, versatile, microprocessor-based transmitter
• Integrates flow-range adjustments, and meter validation and diagnostics
• Gives you the ability to "field-validate" your meter’s calibration

Sierra Instruments’ FastFlo™ 620S Immersible Thermal Mass Flow Meter provides an economical solution for gas flow measurement applications. The meter’s sensor offers long-term reliability and 200 millisecond response to changes in flow rate.

The versatile microprocessor-based transmitter integrates the functions of flow-range adjustment, meter validation and diagnostics in a probe-mounted NEMA 4X (IP65) housing. Mass flow rate and totalized flow, as well as other configuration variables, can be displayed on the meter’s optional 2 x 12 backlit LCD panel.

The meter also provides an optical/galvanic isolated 4-20 mA output and two alarm outputs. The programmable transmitter is easily configured via RS-232 and Sierra’s Smart Interface™ Windows™ based software or three push buttons in the device. Modbus RTU is also supported. The 620S is suitable for pipes or ducts from 1-inch to 48-inches (DN50 to DN1200).

Features

• Fast response flow meter ideal for gas mass flow measurement applications
• 200 millisecond response to changes in flow rate
• Smart electronics permit field adjustment of critical flow meter settings
•  Field validation of flow meter calibration
• Outstanding rangeability
• Optional 2 x 12 backlit LCD display
• Minimal flow blockage and low pressure drop
• CE approved
• Optional Modbus RTU

Specifications

• Measure air and all clean inert gases
• Accuracy: +/- 1% of full scale
• Repeatability of +/- 0.2% of full scale
• Pipe sizes from 3.7" (9.3cm) up to 24" (61cm)
• Small-diameter, 3/8-inch (9.5mm) sensor probe
• 100:1 turndown
• Temperature:
  • Gas: -40°F to 176°F (-40°C to 80°C)
  • Ambient: -40°F to 120°F (-40°C to 50°C)
• Response time is 200 milliseconds to achieve 63% of final value
• Power supply 15 to 18 VDC (regulated), 625 mA draw maximum
• Output signals: Linear 0–5 VDC and 4-20 mA
• User definable pulse output for totalized flow
• Digital communications solutions include:  Modbus RTU
• Enclosure NEMA 4X (IP65); remote electronics mounting available
• CE approved

Download Datasheet: Sierra Fast-Response Insertion Thermal Mass Air Flow Sensor

Reference: sierrainstruments.com

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