Omega Products FLV402 User Manual

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TOP VIEW

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4 (0.156) DIAMETER MOUNTING

HOLE (2) PLACES

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25.65 (1.010)

89 (3.50)

64 (2.52)

87 (3.43)

SIDE VIEW

43.2 (1.70)

18.34 (0.722)
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6.35 (0.25)

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CALIBRATION ADJUSTMENT
TRIM POTENTI OMETER

MECHANICAL DIMENSIONS

(SHOWN WITH 6.35 (1/4) TUBE

SIZE FITTINGS INSTALLED)

WATER FLOW CONTROLLERS

FLV400 Series

$

1150

All Models

Optional

⻬ Linear 0 to 5 Vdc

Output Signal

⻬ Liquid Flow Rates

as Low as 13 mL/min

⻬ Superior Long-Term

Stability, Accuracy,
and Repeatability

⻬ Removable Sensor
⻬ Very Low Average

Power Demand
(Approximately 1.25 W)

The FLV400 Series controller
accurately measures and controls
liquid flows. The sensors are
matched to the servo valve for each
of the ranges to be covered—up to
2 L/min in liquids. A linear electrical
output signal is provided for
recording data. These controllers
eliminate the need for continuous
monitoring and manual readjustment
of water pressures.

The heart of the FLV400 is the flow
sensor, which uses a Pelton-type
turbine wheel to determine the
flow rate. The rotation rate of the
turbine wheel is linear over a wide
dynamic range. The electro-optical
system consists of a diode emitting
energy in the infrared spectrum.
Light energy is alternately reflected
and absorbed from “spokes”
deposited on the small turbine
wheel. A photo diode detects this
reflected light. Thus, as the turbine
wheel rotates in response to flow
rates, electrical pulses are
generated. Processing circuitry
produces a DC voltage output
proportional to the flow rate. A
bidirectional linear stepper motor
moves a micro-flow control valve in
response to any error between the
desired flow rate and the actual flow
rate as measured by this flow
sensor. In addition, precise flow rate
settings may be set and maintained
automatically over long periods. The
user can also change the flow rate
from one setting to another remotely.
Flow rate is unidirectional and is
marked for proper direction on the
serial number nameplate.

FLV400 Series, $1150, liquid
flow controller, shown
smaller than actual size.

SPECIFICATIONS

Accuracy: ±3% FS
Linearity: ±3% FS
Repeatability: ±1% FS
Attitude Sensitivity: Not sensitive
20 to 95% of Full Scale Response: 10 s
Temperature Range:

10 to 40°C (50 to 104°F)

Storage Temperature:

0 to 50°C (32 to 122°F)

Max Pressure: 100 psig
Max Viscosity: 10 centistokes

Input: 0 to 5 Vdc
Output Signal: 0 to 5 Vdc

(into a 2500 Ω minimum load
impedance; short circuit protected)

Command Signal: 0 to 5 Vdc
(from a voltage source with a maximum
impedance of 5000 Ω)

Input Power: 12 Vdc at 0.17 A (2 W);
DC voltage can range from 11 to 15 Vdc

Note: 0.6 m (2') long leads are supplied;
#26 gauge signal, command and power
(see color code with cable)

Weight: 0.57 kg (1.25 lb)
Wetted Materials: 40% glass-filled

polyphenylene sulfide, glass window,
stainless steel pivots, valve stems,
bearing supports and sapphire bearings;
white epoxy paint deposited on turbine
wheels to simulate “spokes” and PTFE
TFE or acetal (Polyoxymethylene)

Tube Fitting:

rates through 100 mL/min;

1

⁄8" tube fittings for flow

1

⁄4" tube

fittings for higher flow rates; flow

WARNING

Do not exceed flow rate specified. Running

sensor continuously at flow rates higher
than specified values can damage sapphire
bearings and stainless steel support shafts.

:

controllers are normally shipped with
FKM O-rings and Polyoxymethylene
(acetal) fittings; customer may specify
PVDF fittings (available at additional cost
upon request).

Dimensions: mm (in)

CUSTOM MODELS BUILT TO ORDER!

To Order (Specify Model Number)

Model No. Price Water Flow Range
FLV401-(*) $1150 13 to 100 mL/min
FLV402-(*) 1150 20 to 200 mL/min
FLV403-(*) 1150 50 to 500 mL/min
FLV404-(*) 1150 60 to 1000 mL/min

Specify inlet/outlet pressure.

*

Comes complete with operator’s manual, 0.9 m (3') cable with 9-pin D connector and mating
connector with stripped leads cable.

For optional 4-point NIST calibration certificate add suffix “-NISTWATER” to the model number,
and $300 to price. (NIST Cert for FLV401-(*) has only 3-points).

Ordering Example: FLV403-Water-50/0 psig, 50 to 500 mL/min controller for water, $1150.

F-x

F

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