Area of Application
- Cost-effective measuring device for different utility gas applications
- System optimization due to targeted monitoring of utility gases
- Leakage detection in gas networks
- Suitable for in-house consumption accountancy
Device properties
- Direct mass flow measurement (kg/h, lbs/h, Scf/min, Nm 3 , etc.)
- Selection of gases: air, carbon dioxide, nitrogen and argon
- Nominal diameters: DN 80 to 1500 (3 to 60")
- 3⁄4"- and 1" compression fittings
- Process temperature up to +100 °C (+212 °F)
- Process pressure: 500 mbar a to 20 bar g (7.25 psi a to 290 psi g)
- Calibration accuracy up to 3% o.r. and operable flow range up to 150:1
- 4-20 mA HART, pulse/frequency/status
- cCSAus Cl. 1 Div. 2, CRN
- IP 66/67
Your benefits
The device enables direct measurement of the mass flow
of utility gases. Minimum maintenance and negligible
pressure loss drive down operating costs.
Sizing - correct product selection
Applicator - the reliable, easy-to-use tool for selecting measuring devices for every application
Installation - simple and efficient "Hot tap" mounting tool for installation and removal of device under operating conditions
Commissioning - reliable and intuitive
- Intuitive configuration and simple operation
- Preconfigured in accordance with individual requirements
Operation - Multivariable output values measured: mass flow,
corrected volume flow, FAD volume flow and
temperature
Life Cycle Management (W@M) for your plant
Measuring principle
The thermal measuring principle is based on the cooling of a heated resistance thermometer (PT100), from
which heat is extracted by the passing gas. The gas passes two PT100 resistance thermometers in the
measurement section. One of these is used in the conventional way as a temperature probe, while the other
serves as a heating element. The temperature probe monitors and records the effective process temperature
while the heated resistance thermometer is kept at a constant differential temperature (compared to the
measured gas temperature) by controlling the electrical current used by the heating element. The greater the
mass current passing over the heated resistance thermometer, the greater the extent to which cooling takes
place and therefore the stronger the current required to maintain a constant differential temperature. This means
that the heat current measured is an indicator of the mass flow rate of the gas.
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