RF Capacitance Level Sensors
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Manufacturer: Monitortech(USA)
Model: MK2 Series(Standard Probe)
Introduction:
TrueCap® RF capacitance sensors offer cost-effective point level monitoring with reliability you can count on. Monitor’s complete line, which features models MK-2 and MK-2e, provides you with the most affordable solution for your application. Monitor’s RF capacitance probes are designed to provide a high level of sensitivity, stability and durability for powder and bulk solids applications, as well as liquid and slurry applications. Monitor’s two-year warranty stands behind every TrueCap sensor
Features:
The TrueCap® Model MK-2 RF capacitance point level sensor is a proven problem solver used to ensure maximum performance and reliability, minimizing downtime of operations.
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Microcontroller based for maximum reliability & performance
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Push-button calibration, sensitivity selection & self-test
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Automatic temperature compensation for unmatched calibration stability
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Superior 0.5 pF sensitivity ensures reliability
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Build-up immunity helps eliminate false signals
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High intensity LED indicating light (Ordinary location sensors only)
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Universal power supply minimizes versions
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Available hazardous location approvals with intrinsic safety
Technical Data:
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Power:
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48-240VAC ±10%, 3VA, 50/60Hz
24-48VDC ±10%, 3W
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Altitude:
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6562ft (2000m) max
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Installation Category:
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II
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Pollution Degree:
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4 (reduced to 2 by enclosure) Suitable for indoor/outdoor use
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Ambient Operating Temp:
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-40°F (-40°C) to +150°F (65°C)
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*Internal Bin Temp:
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To +176° F (+80° C) w/alum. mount (<104° F (40° C) ambient)
To +400° F (+204° C) w/SS mount (<122° F (50° C) ambient)
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Output Relay:
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DPDT, 5A @ 250VAC, 30VDC maximum
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IIndicators:
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“DET” yellow LED illuminates when material is sensed
“ OPR” red LED illuminates to indicate output switching
“ CAL” green LED illuminates to indicate proper calibration
“ SEN” bank of four LEDs indicated the sensitivity setting
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External Indicators:
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Red and green LEDs indicating power and operating mode (Ordinary location units only)
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Sensitivity:
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Switch selectable 0.5pf, 2.6pf, 8.3pf, 18.0pf
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Stability:
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±0.01pf per degree F (±0.018pf per degree C) @ 0.5pf setting
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Time Delay:
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0.25 to 15 sec single-turn adjustable for delay to activate and delay to de-activate
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Fail-Safe:
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Switch selectable - HI/LO
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Build-Up Immunity:
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Protected via driven shield to 150 ohm load
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Enclosure:
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Cast alum screw-on cover, beige polyester pwdr coat, NEMA 4, IP66
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Conduit Connection:
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Two (2) 3/4” NPT connections (M20 cable glands provided when 1-1/2” BSPT process connection is specified)
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**Approvals:
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CSA(US) CSA(C) Ordinary Locations, CE Mark(Ordinary location only)
CSA(US) CSA(C): Class I Groups C & D, Exp. Proof & Intrinsically Safe
CSA(US) CSA(C): Class II Group E, F & G, Dust Ignition Proof & Intrinsically Safe
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Probe Specifications
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Mounting:
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1-1/4” NPT alum, R 1-1/2 (BSPT 1-1/2), or combo 3/4” NPT 316SS and 1-1/4” NPT alum
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Probe Material:
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3/8in(9.5mm) dia. 316SS probe & guard, Ryton® & Nylon insulators
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Probe Length:
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16in (406mm) from alum mounting
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Temp (Probe Only):
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Ryton® +450° F (+232° C) max; Nylon +300° F (+148° C) max
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Pressure:
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50 psi (3.5 bar) max (alum connection);
150 psi (10 bar) max (3/4” NPT SS)
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