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Thermal mass Flow meters

The heat dispersion flow meters are based on the principle of heat transfer according to which the flow in a flowing measure in a pipe is subjected, by means of a heating resistance crossed by an electric current, to a heating power that will be absorbed by the fluid.

The flow meters with thermal dispersion can be inserted with internal or external heating of the pipe or of the type in derivation for small, medium and large pipes.
The latter consist of a capillary tube (suitably heated and measured) in which a part of the flow rate is pushed through a laminar measuring device placed in the outflow pipe.

The heat dispersion flow meter is mainly applied for gases but the thermo-physical properties of the fluid must be known.

DPC Precision digital mass flow controller with multi-gas functionality.

Simultaneously displays Mass Flow, Volumetric Flow, Pressure and Temperature.
Multi-Gas functionality: support for 90 different gases and gas mixes.
Two programmable mass flow rate totalizers.
Extensive Self Diagnostics with status LED or OLED indication.
Two user selectable digital communication interfaces (RS-232 and RS-485) are standard.
Local high contrast OLED (optional) graphic display with joystick control.

DPM Multi-parameter mass flow meter.

Multi-parameter functionality: mass flow, volumetric flow, gas pressure and temperature.
Multi-gas functionality: support for 90 different gases and gas mixes.
Two programmable mass flow rate totalizers.
Extensive self diagnostics with status LED or OLED indication.
All 3 user selectable analog output interfaces are standard (0-5Vdc, 0-10Vdc, 4-20mA).
Two user selectable digital communication interfaces (RS-232 and RS-485) are standard.

ZFM Digital mass flow meter.

Multi-gas/Multi-range functionality up to 8 bar (for 6 gases).
Internal conversion factors for up to 26 gases.
Optional Modbus RTU network interface with Isolated RS-485 transceiver.
Automatic sensor zero offset adjustment (via digital interface or local push button).
Extensive Self- diagnostic with status LED or OLED (optional) indication.
Local 128 x 64 high contrast OLED (optional) graphic display with joystick control.

EE771-EE772 Thermal dispersion flow meters for compressed air and technical gases. Flow rates up to 1400 Nmc / h

Measuring principle of thermal dispersion
Measuring range from 0.32 Nm ³/h at 1400 Nm ³/h depending on the diameter
Output signal 0÷10V - 0÷20mA - 4÷20mA
Process connection DN15÷DN80
Materials custody AISI3Cu - stainless steel probe - the sensor head PBT
Temperature up to 80°C - Pressure up to 16 bar (EE771), up to 40 bar (EE772)