The VARIOMASS LC system is a compact mass flowmeter for compressed air working
according to the thermal dispersion principle for pipe sizes from ½“ up to 2“ as In-Line
meter with complete flow body and for pipe size from 2.5” (65 mm) up 20” (500 mm) as an
Insertion meter. Compare to the VARIOMASS ECO flowmeter we do not have that high
accuracy so this will reduce the system price to a low budget unit. The microprocessor
controlled electronic is within the sensor head enclosure and has a 24 VDC power supply,
an analog and pulse output. The optional software WIN-LC and the USB port with a connection
to a PC allows the user to readout and change all preset values or he can use the
PC as a data logger for the flow values data’s vs. time. All units have a LCD display with 2
x 16 sign to indicate the actual and total flow values with flow units. The analog outputs (0-
20 mA or 4-20 mA) transmit the actual flow values and the pulse output (example 1
m³/puls) gives you the total flow value for example to an external pulse counter. All electrical
connections are made by a round 8-Pin female metal connector with protection class
IP 65 (NEMA 4).

STANDARD AND OPTIONAL PARTS

Fig.1): In-Line Sensor with and
Fig.2) without flow conditioner
Fig.3) BVR ½“-D with pressure transmitter
Fig.4): Option ball valve retractor assembly BVR ½“
Fig 5): LCD Display with backlight (Standard)
􀂾
     * flow conditioner for In-Line Sensor for use with short up- and downstream area
􀂾 *distance holder ring for Insertion Sensor to fix the insertion depth
􀂾 *BVR ½“ ball valve retractor assembly in stainless steel for Insertion Sensor allows to
       install or retract the Sensor probe under pipe pressure up to 12 bar g
􀂾 *Software: WIN-LC for parameter settings or reading values with USB port (Option V)
􀂾 *BVR ½“-D ball valve retractor assembly in stainless steel for Insertion Sensor with
       pressure transmitter (0-10 bar) allows to install or retract the Sensor probe under pipe
       pressure (max. 12 bar g) and gives you a 4-20 mA output of actual line pressure
􀂾 *8-PIN male counter connection with protection class IP 65 (NEMA 4) without or with interconnecting
       cable in length of 2, 5, 10, 20 or xx meter (xx = 21 up to 99 Meter –
       please indicate)

ECHNICAL DATA

Power supply 24 V (+/- 20%) DC max. 8 Watt
Ambient temperature: -10°C up to + 60°C
Protection class: IP 65 (NEMA 4) aluminum enclosure with male connector
Output signal: 0/4 - 20 mA linear acc. to flow range & pulse output 1m³/pulse
Flow unit: Nm³/h, Nm³/min., Nl/min. or SCFM
Normal / Standard conditions(N): Acc. to ISO 1217 with 20°C (68°F) & 1 bar abs. (14.5 PSI)
(optional other standard conditions possible – please indicate)
Media: air at 4 to 12 bar g (Optional other pressure range or gases)
Media temperature range: 20°C (+/- 20°C) (Optional up to 200°C)
Max. working pressure: 16 bar g. / 230 PSI (Optional 40 bar g. / 580 PSI)
Process connection: R ½" male thread for Insertion sensor and
NPT ½“ up to R 2“ male thread for In-Line sensor
Accuracy: +/- 2% of reading +/- 1% of FS (Full Scale)
Turn down ratio: 10:1 up to 100:1
Repeatability: +/- 0.5% of reading
Wetted parts: Stainless steel (316 SS)
Pipe size and flow ranges according
to normal conditions (N) of
20°C, 1 bar abs. & 0% r. humidity
In-Line sensor from 1 NL/min (SLPM) up to 600 Nm³/h
(SCMH) and Insertion meter from 65 mm up to 500 mm pipe
with 1 Nm³/h up to 100.000 Nm³/h with high flow option
Up- and Downstream area: min. 10 x D and 5 x D, with conditioner 3 x D and 2 x D