CMC Technologies Pty Limited

Engineering & Industrial Instrumentation

EPI ValuMass Series 400 VAL | Inline Flow Meters

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  • Meter Type: Inline, designed for direct inclusion in pipe systems.
  • Enclosure: NEMA 4X (IP66)
  • Certifications: CE marked, attesting to its quality and compliance with European standards.


ValuMass Series 400 VAL Thermal Mass Inline Flow Meters

The ValuMassTM product family, which includes EPI’s Series 400 inline thermal mass flow metre, provides affordable solutions for a range of flow applications without sacrificing the high quality of EPI’s flow measurement equipment. For non-hazardous applications, this inline thermal mass flowmeter is especially made with a standard NEMA 4X Rated (IP66) enclosure.

The ValuMass™ Series 400 thermal flow metre features the same unique engineering, including two RTD (Resistance Temperature Detector) sensing elements. These sensors, which use our proprietary temperature compensation techniques, are made of reference-grade platinum, ceramic, glass, and stainless steel. For superior protection, abrasion, and corrosion resistance, they are slipped in a stainless steel cover.

Key Specifications:

  • Meter Type: Inline, integrating seamlessly into your system.
  • Enclosure: Standard NEMA 4X Rated (IP66), ensuring protection against dust, water, and corrosion.
  • Warranty: Confidence with 1-4 years of coverage.
  • Certifications: CE approval, meeting high standards of quality and safety.
  • Material Composition: Constructed with reference-grade platinum and robust stainless steel for extended durability.

The ValuMass Series 400 is manufactured for excellence, featuring:

  • Dual RTD sensing elements that enhance the accuracy of temperature measurements crucial for precise flow metering.
  • Proprietary temperature compensation technology that adjusts readings across a wide temperature range.
  • Stainless steel sheathing that fortifies the sensor assembly, boosting its resistance to abrasion and corrosion.
  • An easy installation process thanks to its design that fits standard pipe sizes from 1/4″ through 2″.
  • Linearizing electronics within the meter’s enclosure, optimizing measurement accuracy and repeatability.

Accuracy, Including Linearity (Ref.: 21°C)

  • ±(1% of Reading + 0.5% of Full Scale + GTC)


  • ±0.2% of Full Scale

Linear Signal Output

  • Software Controlled 0 – 5 or 0 – 10VDC (Flow and Temperature), 4 – 20 mA (Flow and Temperature), RS485 Modbus RTU (Flow Rate/Total, Temperature), Optional 0 – 1 kHz (proportional to flow for total/counter)

Sensor Response Time

  • 1 second to 63% of final value

Turn Down Ratio

  • 100:1 @ 10 SFPM (.051 NMPS) Minimum Reading

Electronics PCB Temperature Range

  • -40° to 158°F (-40° to +70°C)

Environmental Temperature Range

  • -40° to 140°F (-40° to +60°C)

Gas Temperature Range

  • -40°–392°F (-40°–200°C)

Gas Pressure Effect

  • Negligible over ± 20% of absolute calibration pressure

Inline Flowmeters

  • 500 PSIG

Input Power Requirement

  • 24VDC @ 250mA, 115 VAC 50/60 Hz optional, 230 VAC 50/60 Hz 50mA optional

Transmitter Power Requirements

  • 5 Watts or less

Relay Output Rating

  • 1 Amp @ 30VDC (33W) (2 Relays, 1 if Freq. Out needed)


  • RS-232C, RS485 Modbus RTU


  • Optional 2-lines, 16 characters per line, backlit LCD (No Keypad)

Wetted Materials

  • 316 & 316L Stainless Steel

Standard Temperature & Pressure (STP)

  • 70°F & 29.92″ Hg (Air = 0.075 Lbs. / FT(^3))

NIST Traceable Calibration

  • Standard

Enclosure Rating

  • NEMA 4X (IP66)

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