ATEX approved Gas Flow meters – Models VA550
The new flow sensors VA550 operate on the calorimetric principle. Therefore the use of temperature and pressure compensation is not necessary.
Robust design, with aluminum die cast housing, and robust sensor tip made from stainless steel 1,4571,the new
VA 550 are suitable for demanding industrial applications. An ATEX version is available for applications in hazardous areas.
Contrary to the previously used bridge circuit the newly developed electronics records all measured values digitally. This allows very precise and fast measurements with a wide temperature range of up to 180 °C (resp. 350 °C).
The measuring span is 1…1000 and enables measurements with low velocities all the way up to 224 m/s.
VA 550 has an integrated Modbus output as a standard with which all parameters Nm³/h, Nm³, Nm/s, Nl/min, Nl/s, kg/h,kg/min, ft/min, °C etc. can be transferred. All parameters can be
adjusted directly at the instrument (via display) or via the PI 500 hand-held measuring instrument.There are also 2 x 4 – 20mA
analogue outputs for flow and temperature monitoring together with a galvanically isolated pulse output for monitoring totalised flow.
Remote diagnosis can be carried out via Modbus and all relevant parameters can be checked and changed if necessary. So it is possible to change many parameters including Gas Type, Pipe ID, Scaling, Zero Point etc.
Via remote diagnosis and status update e. g. temperature excess, failures of the sensor or the
calibration date can be determined.