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TrueCap®
RF Capacitance Level Sensors –
MK2e
RF Capacitance Level Control- MK2e
 

Bulletin Button

Now Available...Quick-Connect Tri-Clamp Process Connection. Click Here For Details.

MK2e RF Capacitance Level Probe

 

TrueCap® RF capacitance sensors offer cost-effective point level detection / 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 the detection of powder and bulk solids applications, as well as some liquid and slurry applications. Monitor’s two-year warranty stands behind every TrueCap sensor.

.: Principle of Operation

.: Applications

.: Model Selection

.: Features

.: Options

.: Accessories

.: Probe Variations

.: Specifications

.: Warranty

 

 
Principle of Operation

A radio frequency is applied to the probe and is continually analyzed to determine the influence caused by the surrounding environment. As material contacts the probe, the radio frequency shifts indicating an increase in capacitance (C). The active probe of the unit and the vessel’s wall make up the two plates (A=area) of a capacitor which are separated by a fixed distance (d). The probe’s insulator and surrounding air provide the dielectric material (with dielectric constant “K”). As the air (K=1.0) is displaced with any other material (K > 1.0), the capacitance effect (C) is enhanced, thereby changing the application’s impedance. This influence is measured within the circuitry and compared to a reference established by the sensitivity setting. The setting determines how much influence must be present before the output changes.

RF Capacitance With Driven ShieldThe driven shield section of the probe enables the circuitry to ignore product build-up on the probe that would otherwise cause false sensing. The driven shield is activated with the same radio frequency potential as the sensing probe. Since current can not flow between identical potentials, the driven shield blocks current flow from the active probe to the vessel wall through the material build-up, thereby eliminating the sensing of the material build-up.

 

 
Applications
(click here to download)
 

TrueCap® RF capacitance point level detectors are versatile devices providing high and low level readings in bins, silos, tanks, hoppers, and other vessels. TrueCap’s superior sensitivity range allows users to properly adjust units to meet the needs of a wide variety of applications. Whether your application is for a powder, liquid, granular solid, or viscous material, the TrueCap product line offers the right solution.

Typical Applications include, but are not limited to:

Chemicals

Plastics

Pellets

Feed/Grain

Rubber

Pharmaceuticals

Liquids

Wastewater

Sand

Food Ingredients

Slurries

Cement

Powders

Paint & Coatings

Coal

Granular Solids

Oils

Paper Pulp 

 

 
Model Selection

Monitor offers the market an unmatched selection of RF Capacitance point level sensors. Several parameters should be considered when selecting the proper TrueCap® RF capacitance point level sensor.

EASE OF CALIBRATION
Many applications are well served by the manual calibration of the MK-2e, but only the MK-2 offers the extraordinary convenience of push-button calibration, sensitivity and self-test.

CALIBRATION LOCATION
Some applications place probes in locations which are difficult to access. The Remote Calibration Module (MK-2 only) provides all push-button functions from a location up to 1,000 feet (305 m) away from the probe. Also, the split architecture versions of both the MK-2 and MK-2e provide remote calibration 12 feet (3.7 m) or more away from the probe.

VARYING TEMPERATURES
It is important that the calibration of a probe remains stable during swings in the process and ambient temperatures. The MK-2 automatically adjusts its calibration to account for temperature changes providing maximum reliability.

CHANGING CONTENTS/CHARACTERISTICS
TrueCap sensors can be calibrated to the material with the lowest dielectric constant (usually the driest material) in order to sense all products which could enter the bin. However, sometimes the need for re-calibration is unavoidable, making the MK-2 with push-button calibration and an available remote calibration module the best choice.

HEAVY MATERIALS & TIGHT AREAS
Some applications require compact, sturdy probes for heavy materials or confined spaces. The MK-2 and MK-2e offer a stub probe for extra durability for heavy products and a compact design for tight areas. Both models also use heavy duty 3/8 inch (9.5 mm) diameter probes.

SOLIDS
All TrueCap sensors can sense solid materials, but be careful to also look at all application parameters.

MATERIAL COATING/BUILD-UP
Many liquids, slurries and sticky bulk solids tend to cling to probes. Product build-up immunity through a driven shield design is a must. The MK-2 and MK-2e provide product build-up immunity and can typically be used with these materials.

HIGH VIBRATION
When locating sensors near vibrators, bin dischargers or other vibrating equipment, the split architecture version is recommended.

UNIVERSAL POWER SUPPLY
Minimizing the number of variations can maximize value for OEMs and product resellers. The MK-2 is the only TrueCap sensor that provides this capability.

NEED FOR VISUAL INDICATION
Both the MK-2 and the MK-2e are provided with a high intensity LED indicator on the housing (Ordinary location integral sensors only).

HAZARDOUS LOCATIONS
The MK-2 and MK-2e are available approved for Class I and Class II hazardous locations. See “Specifications” for details.

HIGH TEMPERATURE
For applications up to 450°F, (232°C) the MK-2 and MK-2e offer stainless steel mounting connections which act as thermal barriers and a split architecture version which completely removes the electronics from the process.

LARGE PARTICLES
Large particles can leave air gaps which could lead to inaccurate readings. However, smaller particles and fines usually fill in the gaps.

APPLICATION

MK-2

MK-2e

Ease of Calibration

Best

Fair

Calibration Location

Best

Good

Varying Temperatures

Best

Good

Changing Contents/Characteristics

Best

Good

Heavy Materials & Tight Areas

Good

Good

Solids

Best

Good

Material Coating/Build-Up

Best

Good

High Vibration

Best

Best

Need for Visual Indication

Best

Best

Hazardous Locations

Best

Best

High Temperature

Good

Good

Large Particles

Good

Good

 

 
Features

The TrueCap® Model MK-2e RF capacitance point level sensor is a reliable sensor and is a standard for many OEMs and end users requiring versatility and lower cost.

Model MK-2e RF Cap FamilyLevel Sensor Light

Superior 0.5 pF sensitivity ensures reliability

Build-up immunity helps eliminate false signals

High intensity LED indicating light (Ordinary location integral sensors only)

Available hazardous location approvals with intrinsic safety

Simple 2-step manual calibration

Economical

 

 
Options

FOOD GRADE PROBE
Most probe variations are available with nylon insulators for food grade applications. Food grade probes are usually outfitted with the stainless steel connection.


Food Grade Level Probe

HAZARDOUS APPROVALS
Most MK-2e models are offered with explosion proof housings and intrinsically safe probes thereby meeting requirements for Class I and Class II environments. See "Specifications" for details.

 

 

SS CONNECTION
A 3/4” NPT 316 stainless steel mounting connection for applications requiring material compatibility enhances the effectiveness in food grade or corrosive applications.

SS Connection

SPLIT ARCHITECTURE
For applications involving high temperature or vibration, the probe and electronics are housed in separate enclosures mounted 12 feet (3.6 m) apart or more depending on the application, thereby removing the electronics from the stressful conditions. All adjustments are performed at the remote electronics.

Split Architecure

 

 

 
Accessories

MOUNTING PLATES
Painted carbon steel or stainless steel mounting plates eliminate the need to weld a mounting coupling to the vessel.

PROBE EXTENSIONS
Rigid probe extensions with solid or flexible couplings easily extend the sensing point to a desired distance from any top-mounted TrueCap® probe.

QUICK-CONNECT TRI-CLAMP ACCESSORIES
Accessories to go with the quick-connect tri-clamp version of the TrueCap® include:
#11-3017: Tri-clamp, 304SS
#11-3007: Ferrule, 316SS, 1"
#11-2007: Gasket, Viton®

 

 
Probe Variations

Dimensions are shown in inches with millimeter equivalent in brackets.

STANDARD PROBE
The most commonly used probe variation, the standard probe performs reliably in many different applications. The standard probe is available with either a 1-1/4” NPT, 1-1/2” BSPT* or 3/4” NPT process connection.
*Unit with 1-1/2” BSPT connection is provided with M20 cable glands.

Standard Level Probe
Standard Probe

STUB PROBE
Usually used in tight spaces, or in applications with heavy material, the stub probe is a shorter version of the stub probe. The stub probe is available with either a 1-1/4” NPT, 1-1/2” BSPT* or 3/4” NPT process connection.
*Unit with 1-1/2” BSPT connection is provided with M20 cable glands.

Stub Probe
Stub Probe

 

QUICK-CONNECT
TRI-CLAMP PROCESS
CONNECTION PROBE

This quick connect / disconnect option provides easy installation and easy removal of the TrueCap® unit for cleaning purposes. Ideal for general sanitation situations not requiring 3-A Rating. Tri-clamp accessories are sold separately from sensor.
Accessories Include:
#11-3017: Tri-clamp, 304SS
#11-3007: Ferrule, 316SS, 1"
#11-2007: Gasket, Viton®

Click Here for Product Sheet




tri-clamp version level sensor

CABLE EXTENSION PROBE
The cable extension probe can extend the sensing point up to 50 feet (15 m) beneath the mounting point. It should be noted that the build-up immunity, however, is not extended with the cable version. Use the pipe extension probe in those applications requiring build-up immunity. A 1-1/4” NPT, 1-1/2” BSPT* or 3/4” NPT process connection is available.
*Unit with 1-1/2” BSPT connection is provided with M20 cable glands.

Cable Extension Level Probe

 

 

Cable Extension Probe

PIPE EXTENSION/LAGGED HOUSING
The pipe extension probe extends the sensing point and build-up immunity up to 12 feet (3.6 m) down into the bin. The lagged housing version “Lags” the housing up to 24 inches (610 mm) away from the mounting point for high temperature applications and/or vessels with external insulation.

 

Pipe Extension Probe
Pipe Extension Probe

 

 
Specifications

Power:

115VAC (±15%); 2.5VA; 50/60Hz
230VAC (±15%); 2.5VA; 50/60Hz
24VDC (±15%); 3W (N/A on Remote Elec or Haz Loc Approval)

Altitude:

6562ft (2000m) max

Installation Category:

II

Pollution Degree:

4 (reduced to 2 by enclosure) Suitable for indoor/outdoor use

Ambient Operating Temp:

-40°F (-40°C) to +150°F (65°C)

*Internal Bin Temp:

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)

Output Relay:

SPDT, 5A @ 250VAC, 30VDC maximum

External Indicators:

Red and green LEDs indicating power and operating mode (Ordinary location units only)

Sensitivity:

Multi-turn potentiometer adjustment 0.5pf to 150 pf

Stability:

±0.015pf per degree F (±0.027pf per degree C) @ 0.5pf setting

Time Delay:

?0.25 to 15 sec delay-to-activate, adjustable
0.25 sec delay-to-deactivate, fixed

Fail-Safe:

Switch selectable - HI/LO

Build-Up Immunity:

Protected via driven shield to 150 ohm load

Enclosure:

Cast alum screw-on cover, beige polyester pwdr coat, NEMA 4, IP66

Conduit Connection:

Two (2) 3/4” NPT connections (M20 cable glands provided when 1-1/2” BSPT process connection is specified)

**Approvals:

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 Groups E, F &G, Dust Ignition Proof & Intrinsically Safe

* Influenced by mounting, material thermal conductivity and ambient temperature.
** Hazardous location approvals on units with Pipe Extension or Lagged Probes with integral electronics/probe are CSA(US/C) Class II Group G (SS version ONLY. Hazardous location approvals are not available on the galvanized version).
Hazardous location approvals not available on any split architecture models.

Probe Specifications

Standard/Food Grade Probe:

Mounting:

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

Probe Material:

3/8in(9.5mm) dia. 316SS probe & guard, Ryton® & Nylon insulators

Probe Length:

16in(406mm) from alum mounting

Temp (Probe Only):

Ryton® +450° F (+232° C) max; Nylon +300° F (+148° C) max

Pressure:

50 psi(3.5 bar) max (alum connection);
150 psi(10 bar) max (3/4” NPT SS)

Stub Probe:

Mounting:

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

Probe Material:

3/8in(9.5mm) dia. 316SS probe & guard, Ryton® & Nylon insulators

Probe Length:

9" (229mm) from aluminum mounting

Temp (Probe Only):

Ryton® +450° F (+232° C) max; Nylon +300° F (+148° C) max

Pressure:

50 psi(3.5 bar) max (alum connection);
150 psi(10 bar) max (3/4” NPT SS)

Cable Extension Probe:

Mounting:

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

Probe Material:

1/8in(3.2mm) diameter 316 SS Teflon® jkt’d cable, Nylon insulator

Cable Length:

Customer specified from 17" (432 mm) up to 50 ft (15 m) overall insertion from aluminum mounting

Temp (Probe Only):

+300° F (+148° C) max

Pressure:

50 psi(3.5 bar) max (1-1/4" NPT alum);
150 psi(10 bar) max (3/4” NPT SS)

Pipe Extension Probe:

Mounting:

1-1/4” NPT alum

Probe Material:

Galvanized or 316SS

Probe Length:

Customer specified from 22" (559 mm) up to 144in (3.6m) oerall insertion

Interface to:

Standard or Food Grade (See applicable specs)

Lagged Housing Version:

Mounting:

3/4” NPT 316SS

Lag Material:

Galvanized or 316SS

Lag Length:

Customer specified from 7 to 24 in (178 to 610 mm)

Interface to:

Standard Probe only (See applicable specs)

Split Architecture:

Elec. Enclosure:

Cast Aluminum, screw-on cover, polyester powder coat (HL)
Fiberglass enclosure (OL) (MK-2 only)

Cable:

12 ft (3.6m), 22 awg co-ax / 18 awg wire

Max Bin Temp:

Ryton® probe: +450° F (+232° C);
Nylon: +300° F (+148° C)

Ryton® - Trademark of Phillips Chemical Co.
Teflon® - Trademark of DuPont Chemical Co.

 

 
Warranty

Monitor Technologies LLC warrants each TrueCap® RF capacitance sensor it manufactures to be free from defects in material and workmanship under normal use and service for two (2) years from the date of purchase. The purchaser must notify Monitor of any defects within the warranty period, return the product intact, and prepay transportation charges. The obligation of Monitor Technologies LLC under this warranty is limited to repair or replacement at its factory. This warranty does not apply to any product which is repaired or altered outside of Monitor Technologies’ factory, or which has been subject to misuse, negligence, accident, incorrect wiring by others, or improper installation.

 

 
Part Numbers / Product Configurations
Monitor Logo

Part # > Product Configuration
11-8411-111 > MK-2e,RYTON,H/L,115VAC,1-1/4
11-8411-112 > MK-2e,RYTON,H/L,115VAC,COMBO
11-8411-114 > MK-2e,RYTON,H/L,115VAC,SS PIPE EXT
11-8411-116 > MK-2e,RYTON,H/L,115VAC,SS LAGGED
11-8411-121 > MK-2e,RYTON,H/L,230VAC,1-1/4
11-8411-122 > MK-2e,RYTON,H/L,230VAC,COMBO
11-8411-124 > MK-2e,RYTON,H/L,230VAC,SS PIPE EXT
11-8411-126 > MK-2e,RYTON,H/L,230VAC,SS LAGGED
11-8411-211 > MK-2e,RYTON,O/L,115VAC,1-1/4
11-8411-212 > MK-2e,RYTON,O/L,115VAC,COMBO
11-8411-213 > MK-2e,RYTON,O/L,115VAC,GAL PIPE EXT
11-8411-214 > MK-2e,RYTON,O/L,115VAC,SS PIPE EXT
11-8411-215 > MK-2e,RYTON,O/L,115VAC,GAL LAGGED
11-8411-216 > MK-2e,RYTON,O/L,115VAC,SS LAGGED
11-8411-217 > MK-2e,RYTON,O/L,115VAC,1-1/2
11-8411-221 > MK-2e,RYTON,O/L,230VAC,1-1/4
11-8411-222 > MK-2e,RYTON,O/L,230VAC,COMBO
11-8411-223 > MK-2e,RYTON,O/L,230VAC,GAL PIPE EXT
11-8411-224 > MK-2e,RYTON,O/L,230VAC,SS PIPE EXT
11-8411-225 > MK-2e,RYTON,O/L,230VAC,GAL LAGGED
11-8411-226 > MK-2e,RYTON,O/L,230VAC,SS LAGGED
11-8411-227 > MK-2e,RYTON,O/L,230VAC,1-1/2
11-8411-231 > MK-2e,RYTON,O/L,24VDC,1 1/4
11-8411-232 > MK-2e,RYTON,O/L,24VDC,COMBO
11-8411-233 > MK-2e,RYTON,O/L,24VDC,GAL PIPE EXT
11-8411-234 > MK-2e,RYTON,O/L,24VDC,SS PIPE EXT
11-8411-235 > MK-2e,RYTON,O/L,24VDC,GAL LAGGED
11-8411-236 > MK-2e,RYTON,O/L,24VDC,SS LAGGED
11-8411-237 > MK-2e,RYTON,O/L,24VDC,1-1/2
11-8412-111 > MK-2e,NYLON,H/L,115VAC,1-1/4
11-8412-112 > MK-2e,NYLON,H/L,115VAC,COMBO
11-8412-121 > MK-2e,NYLON,H/L,230VAC,1-1/4
11-8412-122 > MK-2e,NYLON,H/L,230VAC,COMBO
11-8412-211 > MK-2e,NYLON,O/L,115VAC,1-1/4
11-8412-212 > MK-2e,NYLON,O/L,115VAC,COMBO
11-8412-213 > MK-2e,NYLON,O/L,115VAC,GAL PIPE EXT
11-8412-214 > MK-2e,NYLON,O/L,115VAC,SS PIPE EXT
11-8412-217 > MK-2e,NYLON,O/L,115VAC,1-1/2
11-8412-218 > MK-2E,NYLON,O/L,115VAC,TRI-CLP
11-8412-221 > MK-2e,NYLON,O/L,230VAC,1-1/4
11-8412-222 > MK-2e,NYLON,O/L,230VAC,COMBO
11-8412-223 > MK-2e,NYLON,O/L,230VAC,GAL PIPE EXT
11-8412-224 > MK-2e,NYLON,O/L,230VAC,SS PIPE,EXT
11-8412-227 > MK-2e,NYLON,O/L,230VAC,1-1/2
11-8412-231 > MK-2e,NYLON,O/L,24VDC,1-1/4
11-8412-232 > MK-2e,NYLON,O/L,24VDC,COMBO
11-8412-233 > MK-2e,NYLON,O/L,24VDC,GAL PIPE EXT
11-8412-234 > MK-2e,NYLON,O/L,24VDC,SS PIPE EXT
11-8412-237 > MK-2e,NYLON,O/L,24VDC,1-1/2
11-8413-111 > MK-2e,STUB RYTON,H/L,115VAC,1-1/4
11-8413-112 > MK-2e,STUB RYTON,H/L,115VAC,COMBO
11-8413-121 > MK-2e,STUB RYTON,H/L,230VAC,1-1/4
11-8413-122 > MK-2e,STUB RYTON,H/L,230VAC,COMBO
11-8413-211 > MK-2e,STUB RYTON,O/L,115VAC,1-1/4
11-8413-212 > MK-2e,STUB RYTON,O/L,115VAC,COMBO
11-8413-213 > MK-2E,STUB RYT,O/L,115VAC,GAL PIPE
11-8413-217 > MK-2e,STUB RYTON,O/L,115VAC,1-1/2
11-8413-218 > MK-2E,STUB RYTON,O/L,115VAC,TRI-CLP
11-8413-221 > MK-2e,STUB RYTON,O/L,230VAC,1-1/4
11-8413-222 > MK-2e,STUB RYTON,O/L,230VAC,COMBO
11-8413-227 > MK-2e,STUB RYTON,O/L,230VAC,1-1/2
11-8413-231 > MK-2e,STUB RYTON,O/L,24VDC,1-1/4
11-8413-232 > MK-2e,STUB RYTON,O/L,24VDC,COMBO
11-8413-236 > MK-2E,STUB RYTON,O/L,24VDC,SS LAG
11-8413-237 > MK-2e,STUB RYTON,O/L,24VDC,1-1/2
11-8414-111 > MK-2e,STUB NYLON,H/L,115VAC,1-1/4
11-8414-112 > MK-2e,STUB NYLON,H/L,115VAC,COMBO
11-8414-121 > MK-2e,STUB NYLON,H/L,230VAC,1-1/4
11-8414-122 > MK-2e,STUB NYLON,H/L,230VAC,COMBO
11-8414-211 > MK-2e,STUB NYLON,O/L,115VAC,1-1/4
11-8414-212 > MK-2e,STUB NYLON,O/L,115VAC,COMBO
11-8414-217 > MK-2e,STUB NYLON,O/L,115VAC,1-1/2
11-8414-221 > MK-2e,STUB NYLON,O/L,230VAC,1-1/4
11-8414-222 > MK-2e,STUB NYLON,O/L,230VAC,COMBO
11-8414-227 > MK-2e,STUB NYLON,O/L,230VAC,1-1/2
11-8414-231 > MK-2e,STUB NYLON,O/L,24VDC,1-1/4
11-8414-232 > MK-2e,STUB NYLON,O/L,24VDC,COMBO
11-8414-237 > MK-2e,STUB NYLON,O/L,24VDC,1-1/2
11-8416-111 > MK-2e,CABLE EXT,H/L,115VAC,1-1/4
11-8416-112 > MK-2e,CABLE EXT,H/L,115VAC,COMBO
11-8416-121 > MK-2e,CABLE EXT,H/L,230VAC,1-1/4
11-8416-122 > MK-2e,CABLE EXT,H/L,230VAC,COMBO
11-8416-211 > MK-2e,CABLE EXT,O/L,115VAC,1-1/4
11-8416-212 > MK-2e,CABLE EXT,O/L,115VAC,COMBO
11-8416-217 > MK-2e,CABLE EXT,O/L,115VAC,1-1/2
11-8416-221 > MK-2e,CABLE EXT,O/L,230VAC,1-1/4
11-8416-222 > MK-2e,CABLE EXT,O/L,230VAC,COMBO
11-8416-227 > MK-2e,CABLE EXT,O/L,230VAC,1-1/2
11-8416-231 > MK-2e,CABLE EXT,O/L,24VDC,1-1/4
11-8416-232 > MK-2e,CABLE EXT,O/L,24VDC,COMBO
11-8416-237 > MK-2e,CABLE EXT,O/L,24VDC,1-1/2
Remote Electronics for MK-2e Split Architecture Design
11-8610-210 > MK-2E,RMT ELEC,O/L,115V
11-8610-220 > MK-2E,RMT ELEC,O/L,230V
11-8610-230 > MK-2E,RMT ELEC,O/L,24VDC
Remote Probes for MK-2e Split Architecture Design
11-8801-101 > MK-2e,RMT PROBE,RYTON,H/L,1-1/4
11-8801-102 > MK-2e,RMT PROBE,RYTON,H/L,COMBO
11-8801-104 > MK-2e,RMT PROBE,RYTON,H/L,SS PIPE
11-8801-201 > MK-2e,RMT PROBE,RYTON,O/L,1-1/4
11-8801-202 > MK-2e,RMT PROBE,RYTON,O/L,COMBO
11-8801-203 > MK-2e,RMT PROBE,RYTON,O/L,GAL PIP
11-8801-204 > MK-2e,RMT PROBE,RYTON,O/L,SS PIPE
11-8801-207 > MK-2e,RMT PROBE,RYTON,O/L,1-1/2
11-8802-101 > MK-2e,RMT PROBE,NYLON,H/L,1-1/4
11-8802-102 > MK-2e,RMT PROBE,NYLON,H/L,COMBO
11-8802-104 > MK-2e,RMT PROBE,NYLON,H/L,SS PIPE
11-8802-201 > MK-2e,RMT PROBE,NYLON,O/L,1-1/4
11-8802-202 > MK-2e,RMT PROBE,NYLON,O/L,COMBO
11-8802-203 > MK-2e,RMT PROBE,NYLON,O/L,GAL PIP
11-8802-204 > MK-2e,RMT PROBE,NYLON,O/L,SS PIPE
11-8802-207 > MK-2e,RMT PROBE,NYLON,O/L,1-1/2
11-8803-101 > MK-2e,RMT PROBE,STUB RYTON,H/L,1-
11-8803-102 > MK-2e,RMT PROBE,STUB RYTON,H/L,CO
11-8803-201 > MK-2e,RMT PROBE,STUB RYTON,O/L,1-
11-8803-202 > MK-2e,RMT PROBE,STUB RYTON,O/L,CO
11-8803-207 > MK-2e,RMT PROBE,STB RYT,O/L,1-1/2
11-8804-101 > MK-2e,RMT PROBE,STUB NYLON,H/L,1-
11-8804-102 > MK-2e,RMT PROBE,STUB NYLON,H/L,CO
11-8804-201 > MK-2e,RMT PROBE,STUB NYLON,O/L,1-
11-8804-202 > MK-2e,RMT PROBE,STUB NYLON,O/L,CO
11-8804-207 > MK-2e,RMT PROBE,STB NYL,O/L,1-1/2
11-8806-101 > MK-2e,RMT PROBE,CBL EXT,H/L,1-1/4
11-8806-102 > MK-2e,RMT PROBE,CBL EXT,H/L,COMBO
11-8806-201 > MK-2e,RMT PROBE,CBL EXT,O/L,1-1/4
11-8806-202 > MK-2e,RMT PROBE,CBL EXT,O/L,COMBO
11-8806-207 > MK-2e,RMT PROBE,CBL EXT,O/L,1-1/2


 

 

 

Updated June 18, 2013

 

 

 
Spotlight: RF Capacitance Level Sensor
TrueCap Level SensorTrueCap Light  
TrueCap® MK-2
Advanced RF Capacitance Level Probe
The TrueCap® Model MK-2 RF Capacitance point level probe is designed to provide a superior and stable sensitivity threshold making it suitable for a variety of powder / bulk solids and some liquid or slurry applications.

Advanced features of the Model MK-2 include:
> Automatic immunity to material build-up on the probe by its driven shield design
> Push-button calibration
> Enhanced temperature compensation
> Maximized reliability via smart sensing algorithms like “self-validating” fail-safe protection
> Visible status LED on ordinary location units
> Versatility through a variety of configuration options including: hazardous location version, split architecture design, quick-connect process connection, stub probe, cable extensions, solid extensions, Nylon® probes, Ryton® - equiv. probes, etc.

A practical application for the TrueCap would be to use this level sensor where a residual material build-up on a different sensor would cause a false material level indication.

Principle of Operation for the TrueCap RF Capacitance Level Probe:
The vessel wall and the active probe element establish an impedance reference between each other when exposed to air which has a dielectric constant of 1. When materials with a dielectric constant greater than 1 are in close proximity to the probe, the impedance of the sensing field between the sensor and the vessel wall will change. Once the amount of change exceeds a threshold that was electronically determined during the calibration process, an output relay will either be energized or de-energized depending upon the position of the fail-safe selector on the probe’s electronic circuit board. A change of as little as .5 pico-farad is all that is necessary for the probe to sense the presence of material.

Click here for more information on the TrueCap MK-2 Level Sensor or contact Monitor Technologies LLC at
Tel.: 800-766-6486 in the USA and
Tel.: 630-365-9403 worldwide.
 
>>Download TrueCap Product Bulletin #413
>>Click here to learn more about other Point Level Switches from Monitor Technologies

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