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Section 1 Introduction
800 Series Metering Flow Switches have been created to provide a more effective monitoring and control
capability for applications in which liquid flow rates from 0.05 to 50 GPM (0.2 to 190 LPM) must be
monitored and controlled over extended temperature and pressure ranges.
Many capabilities required for extreme operating conditions have been incorporated in the basic product,
allowing the size-reduced metering flow switches to be used in situations in which specialized products
were previously required.
The 800 Series
Metering Flow Switches have been developed from Proteus’ experience in satisfying the
needs of thousands of demanding users in widely diverse applications since 1978.
Section 2
Features and Functions
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Flow ranges from 0.05 to 50 GPM, 0.2 to 190 LPM.
Eight flow ranges are provided in the 800 Series in brass, polypropylene or stainless steel. NPT and
SAE connections are available.
Proteus 500 Series Metering Flow Switches formed in stainless steel provide similar measurement
and control capabilities for flow rates up to 4.5 GPM. The 500 Series devices occupy less space than
800 Series units, and as standard are capable of operating to 250 psi (690 kPa).
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Calibrated 0-5VDC output
800 Series switching flow meters are calibrated to provide a 5 VDC output at the maximum flow rate
of each version. Actual flow rate in your circuit can be determined by attaching a voltmeter. An
optional scaleable digital voltmeter can be calibrated to provide a direct local display of flow rate.
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Compact design
Depth depends on connection size and type
Figure 1: Outline of 800 Series
