Class I, Division 1 mass flow controllers are designed for use in hazardous locations where explosive gases are present. IS-Max is certified to ATEX, IECEx, and North American standards and is designed for CID1 and Zone 0 environments.
- Flow accuracy up to ± 0.5 % of the reading or ± 0.1 % of the whole scale, whichever is higher
- Technology for measuring laminar differential pressure (DP)
- Protection that is inherently safe: there is no need for explosion-proof housing or purge gases
- Measures temperature, pressure, mass flow, and volumetric flow
- IP66 enclosure
- Measuring and control range of 0.01–100 % (10,000:1 turndown)
Full Scale Flow Ranges
Operating Pressure Range
- 11.5–160 PSIA
- Optional 11.5–320 PSIA with ISMCQ
ISMC Series Flow Controller
For managing gas flow in environments where explosive gases are constantly present.

Image Credit: Alicat Scientific, Inc.
Integrated Valve
- 98 pre-loaded gas calibrations
- 11.5–160 PSIA (high-pressure option up to 320 PSIA)
- 0.5 SCCM–250 SLPM
- Flow accuracy of up to ± 0.5 % of the reading or ± 0.1 % of the whole scale, whichever is higher
ISMCS Series Flow Controller
Corrosion-resistant gas flow control in continuously explosive gas environments

Image Credit: Alicat Scientific, Inc.
Corrosion Resistant
- 128 pre-loaded gas calibrations, including corrosives
- 11.5–160 PSIA (high-pressure option to 320 PSIA)
- 0.5 SCCM–250 SLPM
- Precision of up to ± 0.4 % for reading and ± 0.2 % for full scale
ISMCW Whisper™ Series Flow Controller
Controlling ultra-low pressure drop mass flow in continuously explosive gas environments

Image Credit: Alicat Scientific, Inc.
Minimum Drop in Pressure
- Mass flow controller
- 60 PSIA operating pressure
- Pre-loaded 98 gas calibrations
- 0.5 SCCM to 50 SLPM
- 0.7 PSID minimal pressure drop
- Accuracy as good as ± 0.6 % of reading or ± 0.1 % of full scale, whichever is higher
ISMCQ Series Flow Controller
Controlling high-pressure mass flow in continuously explosive gas environments

Image Credit: Alicat Scientific, Inc.
Higher Pressure
- Mass flow controller
- 98 pre-loaded gas calibrations
- 11.5–320 PSIA operating pressure
- 10 SCCM–2 SLPM
- As accurate as ± 0.6 % of the reading or ± 0.1 % of the whole scale, whichever is higher
Build Options
Source: Alicat Scientific, Inc.
| |
|
| Calibration |
Standard or high accuracy; custom calibration points |
Communication Protocols |
RS-232 Serial (default) RS-485 Serial Analog (4–20 mA) Modbus RTU (over RS-232 or RS-485) |
| Displays |
Backlit monochrome (default) or none |
| Process Connections |
NeSSI SP76 compatible; M5, 10-32”; 1/8”, 1/4” NPT; BSPP, SAE, and VCR |
| Ingress Protection |
IP66 |
| Hazardous Environment Ratings |
See certificates below: ATEX, IECEX, and North America cDEKRAus |
| Humid Gases |
Relative humidity compensation, dew point reading |