Thermal Mass Flow Meter | Flowmeters for Compressed Air and Gas
Flowmeters from CS Instruments work according to the calorimetric measuring principle. This means, while measuring the thermal mass flow or standard volume flow, no additional temperature and pressure compensation is necessary.
The
standard volume is a common volumetric unit used to compare gas
quantities at different pressures and temperatures. In order to meet
various standards, the reference conditions can be set directly on the
display of each flow meter.
Thus,
our reliable flow meters provide consumption and flow measurement
within the individual standard our customers wish to use them.
Kind of Thermal Mass Flowmeter
1. VA 500 Flow sensor for compressed air and gas
Contrary
to the previously used bridge circuit the newly developed evaluation
electronics of our flow sensor records all measured values digitally.
This leads to a better accuracy also in case of large measuring spans of
1:1000.
Special features of flow sensor VA 500
- RS 485 interface, Modbus-RTU as a standard
- Option integrated display for m³/h and m³
- Usable from 1/2“ to 12“ (DN 300)
- Easy installation under pressure
- 4…20 mA analog output for m³/h resp. m³/min
- Pulse output for m³
- Inner diameter adjustable via keypad
- Consumption counter resettable
- Adjustable values at the display of the flow sensor: Reference conditions, °C and mbar, 4…20 mA scaling, pulse weight
2. VA 520 – Affordable Mass Flow Meter for Compressed Air and Gas
The
new affordable mass flow meter VA 520 works according to the approved
calorimetric measuring principle. The additional pressure and
temperature compensation is not necessary. Contrary to the previously
used bridge circuit the newly developed evaluation electronics records
all measured values digitally. This enables very precise and fast
measurements.
Due
to the new evaluation electronics, all VA 520 models have an integrated
Modbus output as a standard. So all parameters can be easily
transferred via Modbus.
Due
to its compact design, it is possible to monitor all compressed air
systems from the compressor to the smallest compressed air tool (1/4“ to
2 inch) with the new mass flow sensor VA 520. VA 500 flow sensors are
available for larger pipe diameters from DN 50 to DN 300. Apart from
compressed air also other gases like e.g. nitrogen, oxygen, and CO2 can
be measured.
Versions of our Mass Flow Meter VA 520
3. VA 550 Flow sensor for heavy-duty industrial applications
The
immersion sensor VA 550 is the ideal flow sensor for installation into
existing compressed air resp. gas lines from 3/4“ up to DN 500.
Special mechanical features:
- Robust impact-proof aluminum die-cast housing for the outdoor area IP 67
- All medium-touching parts made from stainless steel 1,4571
- As immersion sensor suitable for 3/4“ up to DN 500
- On request with ATEX approval ATEX II 2G Ex d IIC T4
- On request with DVGW approval for natural gas (up to 16 bar)
- Pressure range up to 50 bar, special version up to 100 bar
- Temperature range up to 180 °C
- No moving parts, no wear out
- Sensor tip very robust, easy to clean
- Easy mounting and dismounting under pressure via 1/2“ ball valve
- Housing twistable, display twistable by 180°
- Safety ring for mounting and dismounting under pressure
- Depth scale for precise installation
Special measurement technology features:
- 4 values in the display: Nm³/h, Nm³, Nm/s, °C units freely adjustable
- Min/max values and daily/hours/minutes average values freely adjustable
- All measured values, settings like gas type, inner diameter, serial number and so on retrievable via Modbus RTU
- Comprehensive diagnosis functions are readable at the display or remote access via Modbus like e. g. exceeding of max/min values °C, calibration cycle, error codes, serial number, all parameters readable and adjustable
- Notification in case of exceeding of the calibration cycle
- Standard version accuracy 1.5 % of m.v. ± 0.3 % of f.s.
- Precision version accuracy 1.0 % of m.v. ± 0.3 % off.s. up to
- 40 calibration points with certificate
- Measuring span of 1 : 1000 (0.1 up to 224 m/s)
- Configuration and diagnosis via display, hand-held instrument
- PI 500, PC service software on-site
- Gas type (air, nitrogen, oxygen, argon and so on) freely adjustable
- Reference conditions °C and mbar/hPa freely adjustable
- Zero-point adjustment, leak flow volume suppression
- Pressure loss negligible
- Flow measurement in both directions via flow direction switch
4. VA 570 – Flow sensor with integrated measuring section
Flow
sensor VA 570 is supplied with an integrated measuring section. The
measuring sections are available in a flanged version or with R resp.
NPT thread.
A
special feature is the removable measuring head. So the measuring unit
can be removed easily and quickly for calibration or cleaning purposes
without having to dismount the measuring section intricately. During
this period the measuring section is sealed by a closing cap
(accessory).
The
screwing with the centering device ensures that the sensor is
positioned accurately in the center when screwing it into the measuring
section furthermore it grants an exact positioning in the flow
direction. This avoids unnecessary measuring faults.
The
new flow sensors VA 550/ 570 works according to the calorimetric
measuring principle. Therefore an additional temperature and pressure
compensation are not necessary.
Due
to its robust design, the aluminum die-cast housing, the robust sensor
tip made from stainless steel 1,4571, the new VA 550/ 570 is suitable
for demanding industrial applications. An ATEX version is available for
applications in explosive areas. For flow measurement e. g. of natural
gas there is a version with a DVWG admission.
Contrary
to the previously used bridge circuit the newly developed evaluation
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, therefore,
measurements in very low as well as in very high flow speeds of up to
224 m/s.
VA
550/ 570 has an integrated Modbus output as a standard with which all
parameters like 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 a display) or via the PI 500 hand-held measuring
instrument resp. Service Software. Of course, there are also 2 x 4…20 mA
analog outputs available for flow and temperature and a galvanically
isolated pulse output for the total consumption.
A
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 e. g. the gas type, the inner diameter, the scaling and so on or
the zero point resp. the leak flow volume suppression in case of
changed process conditions.
Via
remote diagnosis and status update e. g. temperature exceeding,
failures of the sensor or the calibration data can be determined.
more information please click Catalog Thermal Mass Flow Meters
More info and price please contact marketing@wmablog.com
