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.

Contact an applications engineer

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
  • Communication 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.

Contact an applications engineer

Questions about this product?