Xi'an Shelok Instruments Technology Co., Ltd.
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Description of mass air flow sensor air nitrogen argon thermal mass flow meter
VA500 for flow measurement of compressed air and gases,optionally with display for flow in m3/h and total flow in m3.Contrary to the previously used bridge circuit the newly devel-oped evaluation electronics records all measured values digitally. This leads to a better accuracy also in case of large measuring spans of 1:1000.
Features of mass air flow sensor air nitrogen argon thermal mass flow meter
RS 485 interface, Modbus-RTU as a standard
Incl. temperature measurement
Integrated display for m³/h and m³
Usable from 1/2“ to 12“ (DN 300)
Easy installation under pressure
4-20 mA analogue output for m³/h resp. m³/min
Pulse output for m³
Inner diameter adjustable via keypad
Consumption counter resettable
Adjustable via keys at the display: Gas type, reference conditions, °C and mbar, 4...20 mA scaling, pulse weight
Specification of mass air flow sensor air nitrogen argon thermal mass flow meter
| Principle | calorimetric measurement | Type | Thermal mass flow sensor |
| Medium | air,gas | Housing | polycarbonate(IP65) |
| Power supply | 18-36VDC,5W | Burden | <500Ω |
| Mounting | G1/2'' | Operating pressure | Up to 50bar |
| Operating temperature | -30~110℃ probe tube,-30~80℃ housing | ||
| Acuracy | ±1.5% of m.v.±0.3% of f.s. on request,±1.0% of m.v.±0.3% of f.s. | ||
| Unit at display | m3/h,m3/min,l/min,l/s,ft/min,cfm,m/s,kg/h,kg/min | ||
| Probe tube | Stainless steel,1.4301 mounting length 220mm,diameter 10mm | ||
| Output | RS485 interface,Modbus RTU,4-20mA,pulse | ||
Detailed Images of mass air flow sensor air nitrogen argon thermal mass flow meter