The INVALCO Model 4728 S&W Monitor, in conjunction with a Model 4528 Detector and a Model CX-485 Capacitance Probe is a continuous on-line monitor or percent water in a flowing crude oil emulsion stream. This unit displays percent of water in various ranges from 0-5% up to and including 0-20% on a digital LCD indicator. In addition, the Model 4728 provides a 4-20 mA analog output proportional to input range, and a field-adjusted, time-delayed, limit relay for valve control or alarming. The Model 4728 utilizes CMOS circuitry for low power consumption, high reliability, and wide temperature stability.
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Real-Time Display and Retransmission of S&W - Allows quick response to upset conditions for downstream controls.
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Adjustable Delay of Relay Closure - Prevents nuisance alarms and "actuator overload".
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Direct Analog Output from Model 4528EZ Detector - A 4- 20 mA signal is available from the probe without the need to include the Model 4728 monitor.
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NACE Adaptable - Can be modified for use in sour service.
Power Supply
18-28 Vdc @ 130 mA
115/220 Vac
S&W Full Scale Range
0-25% ±15%, 50/60 Hz, 2 Watts
S&W Range
0-5%, 0-10%, and 0-20% range options.
Display
Four digit LCD with decimal point.
Analog Outputs
4-20 mA, 2-wire internally powered or 4-20 mA, 3-wire externally powered.
Relay Output
SPDT Relay, 10A, 250 Vac.
1/2 Hp 250 Vac, 10A - 120 Vac resistive.
1/3 Hp 120 Vac, 10A - 30 Vdc resistive.
Time Delay
0 to 90 seconds adjustable in 10 second increments.
Off-delay approximately 10% of on-delay time.
Temperature Range
0°F to 160°F (-20°C to 70°C).
Enclosures
NEMA 4X, weatherproof. NEMA 7, explosion-proof, Class I, Division 1, Groups C and D.