Model VA550 – ATEX approved Gas Flow meters

• 04…20 mA, pulse and a Modbus RTU (RS 485) interface as standard, optional interfaces such as Modbus TCP (Ethernet), PoE,     M-Bus
• Pressure range up to 50 bar, special version up to 100 bar
• Media temperature range up to 180 °C (ATEX version up to 120 °C)
• Protection class IP 67 (IP 64 for ATEX II 2D Ex tb IIIC T90°C Db)
• Integrated display for showing the Measured values
• Suitable as insertion version for 3/4″ to DN 1000
• Simple installation under pressure
• Settings can be adjusted using the buttons on the display
• Main counter reading can be reset via the Display
• For Velocities up to 224 Nm/s
• Highly accurate with an Accuracy of ± 1.5% or ± 1% of the Measured value – As well as ± 0.3 % of the final value

Model VA550-ATEX approved Gas Flow meters

The new flow sensors VA550 operate on the calorimetric principle. Therefore the use of temperature and pressure compensation is not necessary. Robust design, with aluminium 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.