Flow Controllers & Meters


IS-Series: Intrinsically Safe Mass Flow Controllers & Meters for Hazardous Environments

IS-Series Intrinsically Safe Mass Flow Controllers & Meters are designed for use in hazardous environments, with Class 1/Div 1 hazardous area classifications.
  • Hazardous area certifications: Class 1, Zone 1, Group IIC, T4; Class 1, Div. 1, Group A,B,C,D,T4.
  • Fast, multivariate data. Immediately upon powering up, control either mass flow, volumetric flow, or pressure and display instantaneous flow, pressure, and temperature readings, in your choice of engineering units.
  • Easy integration. Inline or NeSSI SP76 compatible, custom process ports and electrical connectors, and your choice of Modbus RTU or serial communications for easy integration into your process.

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Accessories included with purchase
  • FlowVision software (free download)
  • Communications cables and conversion cables

Device specs and customization options

Quick Specs
IS-Series performance
  • Available full scale ranges: 0.5 SCCM to 250 SLPM
  • Steady state control/measurement range: 0.01% – 100% of full scale (10,000:1)
  • Standard accuracy calibration, NIST-traceable: ±0.6% of reading or ±0.1% of full scale, whichever is greater
  • Optional high-accuracy calibration, NIST-traceable: ±0.5% of reading or ±0.1% of full scale, whichever is greater
  • Repeatability: ±(0.1% of reading + 0.02% of full scale)
  • Typical control response time: as fast as 25 ms
  • Warm-up time: <1 s
IS-Series operating conditions
  • Compatible gases: 98+ preloaded selectable gas calibrations
  • Operating temperature: –20°C to +70°C
  • Humidity range: 0-95%, non-condensing
  • Ingress protection: IP66 (dust tight and protected against heavy seas or powerful jets of water)
  • Full scale operating pressure: 160 PSIA
  • Max differential pressure: 75 PSID
  • Proof pressure: 200 PSIA
  • User selectable reference conditions (defaults): 25°C & 1 ATM (STP) and 0°C & 1 ATM (NTP)
Device Ranges & Full Specs

Devices are custom ranged from 0.5 SCCM full scale to 250 SLPM full scale with controllable/measureable ranges of 0.01% to 100% of full scale.

Device Features
Included with each device
  • Multi-variable process measurements: Simultaneously measure mass flow, volumetric flow, gas pressure, and gas temperature.
  • User changeable units of measurement: Change the unit of measurement for pressure, flow, or temperature from our extensive list of engineering units.
  • Gas selectability: Select your process gas from any of the 98+ preloaded NIST-traceable gas calibrations in our gas list.
  • Gas Select COMPOSER™: Define 20 custom gas mixtures of up to 5 constituent gases using our Gas Select Composer firmware.
  • Monochrome backlit LCD with integrated touchpad: Easily read measurements using the backlit display and control configurations with the user-friendly integrated touchpad.
  • User adjustable setpoint ramping & limits: Configurable ramp rates allow the process variable to be controlled as fast or as slow as desired, and configurable setpoint limits protect processes from inadvertent setpoint changes.
  • User adjustable standard temperature and pressure (STP) conditions: Quickly change reference conditions without need for recalibration.
  • Valve close override and valve open override: Utilize alarms to quickly vent your system or stop all flow as needed.
Request at time of purchase | Free
  • Optional integrated totalizers & batch control: Totalize mass flow every 1 ms for precise tracking of total flow over time and use batch control to dispense precise volumes.
Device Customization Options
Build and performance options
  • Communications protocols: Analog, RS–232, RS–485, Modbus RTU
  • Displays: Backlit monochrome or color; integrated or panel–mount
  • Process connections: NeSSI SP76 compatible; M5, 10-32”; 1/8”, 1/4“ NPT; BSPP, SAE, and VCR
  • Wetted Materials: 302, 303, 304, and 316L stainless steel; FKM, alumina ceramic, glass, gold, heat-cured epoxy, heat-cured silicone rubber, polyamide, silicon
  • Calibration: High-accuracy; custom calibration points
Optional Accessories
Accessories | Sold separately
  • Process port fittings and filters
  • Power supplies

Not exactly what you’re looking for?

  • Check out our other flow or pressure control and measurement solutions.
  • Our expert team of applications engineers is available to provide additional information, discuss your application, or answer any questions you may have.

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