Mass Flow Measurement With the IS-Max™

Flowmeters designed for Class I Division 1 offer accurate gas measurement in areas where explosive gases are consistently present.

IS-Max is intrinsically safe and has received certification for Zone 0, with approvals from ATEX, IECEx, and North American DEKRA, thereby ensuring adherence to regulations in hazardous locations.

Employing laminar differential pressure technology, IS-Max delivers precise mass and volumetric flow measurements along with multivariate reporting that includes temperature and pressure information.

Key Specifications:

• Precision: ± 0.4 % of the reading or ± 0.2 % of the full scale
• Clear display for rapid verification during installation and field assessments
• Communication: Digital MODBUS or Alicat^® ASCII, along with analog alternatives
• Up to 128 pre-installed gas calibrations for immediate switching without loss of accuracy
• Parameters: Mass flow, volumetric flow, absolute/gauge pressure, barometric pressure, temperature, relative humidity, dew point, and additional metrics

Full Scale Flow Ranges

0.5 SCCM-5,000 SLPM

Operating Pressure Range

11.5-160 PSIA

Optional 11.5-320 PSIA with ISMQ

ISM Series Flow Meter

Gas mass and volume flow meters for explosive environments

Intrinsically Safe

Image Credit: Alicat Scientific, Inc.

• 98 gases
• 0.5 SCCM-5,000 SLPM
• Intrinsically safe mass flow meter
• 11.5-160 PSIA (high-pressure option to 320 PSIA)
• Flow accuracy is as precise as ± 0.5 % of the reading or 0.1 % of the full scale, depending on which is greater.

ISMS Series Flow Meter

Corrosive-resistant gas meters for explosive environments

Stainless Steel

Image Credit: Alicat Scientific, Inc.

• Pressure range: 11.5 to 160 PSIA
• Flow range: 0.5 SCCM to 5,000 SLPM
• Corrosion-resistant intrinsically safe mass flow meter
• It offers an accuracy of ± 0.4 % of the reading and 0.2 % of the full scale
• This device can measure up to 128 gases, including corrosive substances

ISMW Whisper™ Series Flow Meter

Ultra-low pressure drop mass flow meters for continuous explosive gas atmosphere in hazardous locations

Minimal Pressure Drop

Image Credit: Alicat Scientific, Inc.

• 98 gases
• 0.5 SCCM-1,000 SLPM
• 0.07 PSID minimum pressure drop
• Low-pressure-drop intrinsically safe mass flow meter
• 11.5-160 PSIA (high-pressure option available up to 320 PSIA)
• Accuracy can be as precise as ± 0.6 % of the reading or ± 0.1 % of the full scale, depending on which is greater

ISMQ Series Flow Meter

Measure flow rates at higher pressures for continuously explosive gas atmosphere hazardous locations

Higher Pressure

Image Credit: Alicat Scientific, Inc.

• 98 gases
• 10 SCCM-5,000 SLPM
• Operating pressure range of 11.5-320 PSIA
• Intrinsically safe mass flow meter designed for elevated pressures
• Accuracy can reach ± 0.6 % of the reading or ± 0.1 % of the full scale, depending on which is greater

Build Options for Intrinsically Safe Mass Flow Meters

Source: Alicat Scientific, Inc.