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Go to www.flexar.info for for information on guided wave radar level transmitters

 
Flexar® Guided Wave Radar

The Flexar® continuous level measurement system is a smart guided wave radar device used for monitoring the level of powders, granules and other bulk solids as wells as many liquids and slurries.


 
Flexar Guided Wave Radar Level Sensor TDR Flexar GWR Level

Bulletin Button

Proven Flexar® Technology Installed In
Thousands Of Bulk Solids Applications
Reliable TDR (a.k.a Reflex Radar)
Technology Used For Decades
“Smart” Transmitter Output For Use With
Industry-Leading SiloTrack™ Inventory
Management Software
SiloTrack Software Is Network-Ready –
Virtually Unlimited Users (Local & Remote)
Measuring Range Up To 100ft (30m)
In Solids And 200ft (60m) In Liquids
Unaffected By Airborne Dust, Bulk Density,
Temperature, And Other Properties – Ideal
For Powders And Pneumatically Filled Solids
Process Temperatures To +392°F (200°C)
No Field Calibration Required - Easy
To Install And Setup
Optional Analog Output For Easy
Connection To Existing Control Systems
Or Indicating Devices
HMI2 Local Operator Interface Option (Click Here)
 

 

Flexar® Guided Wave Radar Level Sensor

 

When All The Pieces Fit Just Right!
The Flexar® continuous level measurement system is a smart guided wave radar device used for monitoring the level of powders, granules and other bulk solids. It is also suitable for use with a variety of liquids and some sluries. It is used in a wide assortment of vessels and industries for measuring levels up to 200ft (60m) in height.

Bringing the Pieces Together: Manufactured at our facility in Elburn, IL, we uniquely combine this proven and strategically acquired technology with almost five decades of expertise and focus in powder and bulk solids applications, and with our SiloTrack™ inventory management software interface. Monitor Technologies uniquely provides the best solutions in level measurement and inventory management of powders and bulk solids.

The Flexar guided wave radar level sensor and/or transmitter requires no field calibration or re-calibration and can be setup easily by customer personnel without the use of any special tools or training. Flexar units are suited for almost any application, can operate with process temperatures up to 392° F (200°C), can be provided with a variety of process connections and can work reliably with materials having a wide range of bulk densities and dielectric constants.

Flexar is available with a choice of two outputs. The standard output is a “smart” interface for use with SiloTrack™ Version 3.5 PC-based inventory management software. This network-ready software provides a flexible graphical interface for up to 128 “smart” output sensors. In lieu of this “smart” output, an optional analog output is also available.

 

.: Principle of Operation

.: Applications

.: Remote Inv. Monitor

.: HMI2 Control Console

.: Features

.: Probe Style

.: PC Software Mgmt.

.: Specifications

.: Warranty

 

 
Principle of Operation

Flexar® smart guided wave radar level sensors and transmitters operate using TDR (time domain reflectometry) principles that were first developed in the middle part of the 20th century for use in the geological field. Further development of TDR led to its use in the telecommunication industry for detecting breaks in cables. Flexar technology was pioneered in the mid-late 1990’s when TDR was applied to level measuring applications within the process measurement industry.

In the application of TDR for process level measurement micro-pulses are continuously transmitted along a probe or “wave guide” at the speed of light. As soon as the pulses reach the material surface they reflect back to the sensor electronics unit. The time-of-flight of the pulses is calculated and directly related to the distance from the point at which the sensor is mounted on the top of the vessel to the material surface (level). The output from the electronics is continuously updated as the level of the material surface changes.

Flexar smart guided wave radar sensors are equipped with two different measuring modes. In the Direct measuring mode the pulses directly reflect off the material surface back to the electronics unit. This mode is used in applications where the material being measured has a dielectric constant as low as 2.1 for single-cable/rod probes and 1.8 for twin-cable probes.

For materials with dielectric constant below the above mentioned limits, down to as low as 1.4, the second measurement mode is used. This is the TBF (tank bottom following) mode, which is used due to the inability of the pulses to adequately reflect off of the surface of very low dielectric materials. In this measuring mode the Flexar sensor has a “short circuit” at the bottom of the probe at a precisely known distance from the sensor’s mounting point.

In the TBF mode the pulses travel through air at the speed of light and then pass through the material in the vessel at a slower speed, dependent on the specific dielectric constant. The pulses are reflected at the short circuit back up the probe. Flexar sensors in the TBF mode measure the time between the emission and reception of the pulses from the probe short circuit. Because the return time of a pulse when no material is present (through air) is known, we can determine the difference in time between the time-of-flight when empty and the time-of-flight when filled as being directly proportional to the material level in the vessel.

 

 
Applications
Application Questionaire(click here to download - Solids App)

Application Questionaire(click here to download - Liquids App)
 

The Flexar® smart guided wave radar continuous level measuring system can be used in a wide variety of applications, including powders, coarse/fine granular solids, liquids, foodstuffs and even some corrosive substances. Flexar sensor technology is proven in many difficult applications including those where dust levels make it difficult for other technologies to perform reliably, especially at long ranges.

Typical Applications include, but are not limited to:

Feeds

Grains

Aggregates

Cement

Carbon Black

Oils

Coal Dust

Silica

Fly Ash

Lime

Bulk Chemicals

Flour

Powders

Plastic Pellets

PVC Powder


Please consult Monitor's Technical Support Dept. to verify that the Flexar is the best fit for your specific application. Certain conditions (like target material dielectric, silo height, etc.) need to be taken into consideration.

Flexar Silo Level Installation
The maximum range for solids applications is limited to 100ft (30m) due to load limits possible from heavy materials in long ranges. Liquid applications can extend up to 200ft (60m). Any application requiring a continuous level measurement update where the process temperature does not exceed 392° F (200°C) and 580psig (40bar) is possible. The 316 stainless steel probes and threaded or flanged process connections make the Flexar continuous level measuring system ideal for almost any bulk solid and liquid application. To ensure a successful and reliable application, consult with the Monitor Technologies factory-based technical support group to see if Flexar is right for your application.

 

 
Remote Inventory Monitoring

If material levels need to be monitored at one or many locations (i.e. your facility, a location down the street, or a plant on the other side of the world) the Flexar system can provide continuous, reliable and accurate measurements. Using SiloTrack™ Version 3.5 software, inventory monitoring from remote locations has never been easier.

 

 
Features

Solid-State Performance, No Moving Parts.
Unlike weight and cable based systems of old, Flexar® guided wave radar level sensors are state-of-the-art and use a time-proven electronic method for continuous measurement of a material level. This non-mechanical means of measurement helps ensure low maintenance.

Measure Materials With Dielectric > 1.4 (TBF Mode).
Flexar sensors are capable of sensing and measuring the level of most any material. Materials with dielectric constants below 1.8-2.1 require the use of our TBF (tank bottom following) measuring mode.

Unaffected By Dust And Changes In Material Properties.
The technology employed in Flexar units has been proven to be unaffected by airborne dust even during pneumatic filling operations. Unlike through-air technologies such as ultrasonic, through-air radar and laser, Flexar can reliably measure in dusty environments without sacrificing performance or reliability.

Range Of Probes.
In order to handle the assortment of applications possible with Flexar, Monitor offers a range of probe styles including single-cable, twin-cable and single-rod. All probes are constructed of 316 stainless steel, have traction load handling capabilities suitable for their respective applications and are easily field replaceable. Consult with Monitor’s factory-based technical support personnel to select the right probe style for your application.

Assortment Of Process Connections.
To meet the required bulk solids and liquid applications we have prepared a selection of process connections that will ensure a smooth and simple installation. Flexar sensors can be provided with 1-1/2” NPT, 1-1/2” BSP G, 2” ANSI or DIN DN50PN40 flange connections. Probe type will determine the available process connections.

Dual Compartment Enclosure.
The Flexar smart guided wave radar sensor uses an enclosure with two compartments, each with its own access cover. This allows separation of access for wiring and setup/display. The setup/display compartment is provided with a cover window allowing local viewing of the LCD display. In addition, every unit is provided with either two 1/2” NPT conduit entrances (NPT threaded and ANSI flanged process connections) or M20 cable connectors (BSP threaded and DN flanged process connections).

Local LCD Display And Setup.
Each sensor includes a built-in user interface consisting of a three-line backlit LCD display, three pushbuttons and three magnetic sensors (used to perform setup and interact with the unit without having to remove the display cover).

Universal Power Supply.
Power supply choices include a universal high voltage option 100-240 VAC and a low voltage 24 VAC/VDC option.

Choice of outputs.
The standard output for all Flexar guided wave radar units is a “smart” RS-485 communications interface for use with SiloTrack™ Version 3.5 inventory management software. In lieu of this “smart” interface an analog 4-20mA output is available.

Remote electronics available.
The standard unit includes the electronics integrally mounted with the sensor. However, remote mounted electronics is optionally available for applications where the electronics are desired to be mounted away from the probe due to extreme vibration, temperature or for convenient access to the local operator interface. The remote electronics version includes a pre-wired 16.4ft (5m) interconnecting cable.

All units include the CE mark and are approved for use in ordinary locations.

 
Probe Styles

Single Cable 0.16” (4mm)

Single Cable 0.31” (8mm)

Single flexible 316 SS cable with counterweight

Single Flexible 316 SS cable with counterweight

Vessel height < 150ft (45m); Liquids; Some solids
(consult Monitor)

Vessel height < 100ft (30m);
Powders and other bulk solids (consult Monitor)

 

Twin Cable 0.16” (4mm)

Single Rod 0.38” (10mm)

Two flexible 316 SS cables with spacers between them at intervals, w/ counterweight

Single 316 SS rigid rod

Vessel height < 200ft (60m); Low dielectric liquids, some granules (consult Monitor)

Vessel height < 10ft (3m); Liquids; Some powders (consult Monitor)

 

 
HMI2 Operator Interface Control Console
HMI2 Operator Interface

The HMI2 operator interface control console provides convenient, local interface for Monitor’s “Smart” RS-485 SiloPatrol® SMU SE cable-based inventory monitoring sensors and/or Flexar® guided wave radar sensors. HMI2 allows for monitoring up to 32 SMU and/or Flexar sensors. The multi-functional HMI2 controls sensor operations, displays measured and calculated data and performs/displays system and sensor diagnostic messages.

The HMI2 is easily programmed to display calculated level, volume, weight or percent in addition to the basic distance measurement. Manual readings are taken by depressing the MEAS button, followed by the channel number, followed by ENTER.

The HMI2 can also be programmed to operate the SMU “Smart” RS-485 sensors automatically. Menu options allow the user to select days of SMU operation (such as Mon.-Fri.), time window (such as 7 a.m.-3 p.m.) and measurement interval (minimum 30 minutes).

Click Here for more details on the HMI2

 
PC-Based Inventory Management Software

Silo Track Inventory SoftwareSiloTrack™ Version 3.5 Inventory Management Software provides users with an unsurpassed, flexible graphical interface for Flexar® smart guided wave radar sensors. Together, SiloTrack Server and Client software can provide inventory monitoring and management to a virtually unlimited number of users, both internal and external to your facility. This allows easy implementation of remote monitoring and vendor managed inventory programs.

SiloTrack capabilities include:

Monitor up to 128 sensors/with up to 5 sensors per vessel

Easy to setup and use

Network-ready

Remote monitoring via LAN, Internet/WAN or dial-up

Available in English/Spanish language

Automatic and manual measurement initiation

Curve-fit weight table

Enhanced 3-D type silo graphics

Export silo history and alarm data

Automatic Reports and Scheduling

Set up four alarms per silo

Alarm notification via e-mail, fax, and/or pager

*Refer to Bulletin 343B for more information.

 

 
Specifications

Power Requirements:

100-240VAC (+10%/- 15%); 9VA; 50/60Hz or
24VAC/VDC (+10%/- 15%); 9VA/W

Altitude:

6562ft (2000m) maximum

Installation Category:

II

Pollution Degree:

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

Process Temperature:

Ordinary Location Units

-20°F to +300°F (-30°C to +150°C);

Hazardous Location Units

-20°F to +392°F (-30°C to +200°C)

Ambient Temperature:

-5°F to +120°F (-20°C to +50°C)

Operating Pressure:

1-1/2” NPT

-14.5psig to +580psig (-1bar to +40bar)

G 1-1/2 (1-1/2” BSP):

-14.5psig to +580psig (-1bar to +40bar)

2” ANSI:

-14.5 psig to 150 psig (-1bar to 10bar)

DN50PN40:

-14.5psig to +580psig (-1bar to +40bar)

Measurement Range:

Single Cable 0.16” (4mm):

150ft (45m)

Single Cable 0.31” (8mm):

100ft (30m)

Twin Cable 0.16” (4mm):

200ft (60m)

Single Rod .38” (10mm):

10ft (3m)

Accuracy:

Direct Mode: Solids

± 0.8” (20mm)

Liquids

< 20ft (6m): ± 0.2” (5mm)
≥ 20ft (6m): ± 0.2” (5mm) + 0.02% of distance measured

TBF Mode (All):

± 0.8” (20mm) when Dielectric is constant

Repeatability:

± 0.04” (1mm)

Resolution:

± 0.012” (0.3mm)

Minimum Dielectric Constant:

Direct Mode

Twin Cable ≥ 1.8; Single Cable/Rod ≥ 2.1

TBF Mode

All Probe Styles ≥ 1.4

Process Mounting Connection:

Single Cable/Rod Only

1-1/2” NPT; G 1-1/2 (1-1/2” BSP)

All probe Styles

2” ANSI 150lb. Flange; DN50PN40 Flange

Conduit/Cable Entry:

NPT/ANSI Process Connections

(2) 1/2” NPT

BSP/DN Process Connections

(2) M20 x 1.5 cable connectors

Probe Styles:

Single Cable:0.16” (4mm)

316SS

Single Cable:0.31” (8mm)

316SS

Single Rod

316SS; 0.38” (10mm) diameter;

Twin Cable

316SS; Two 0.16” (4mm) cables; FEP spacers

Weight:

Enclosure

18lb (8kg) without probe for ordinary location;
20lb (9kg) without probe for hazardous location;

Single Cable
0.16” (4mm)

0.08lb/ft (0.12kg/m)

Single Cable 0.31” (8mm)

0.28lb/ft (0.41kg/m)

Single Rod

0.42lb/ft (0.62kg/m)

Twin Cable

double weight of 4mm cables above for twin cable

Maximum Traction Loading:

0.31” (8mm) Single Cable

7,700lbs/3.9 tons (3.5 metric tons)

0.16” (4mm) Single Cable

2250lbs/1.1 tons (1.02 metric tons)

Minimum Separation From Objects:

Single Cable/Rod

12” (300mm)

Twin Cable

4” (100mm)

Output Signal:

“Smart”:

RS-485, half-duplex, isolated, proprietary protocol

Analog:

4-20mA; 350ohms maximum load

Wiring Distance (“smart” output):

4,000ft (1,220m)

Local Display:

3-line; Backlit LCD; 3 pushbuttons;
3 magnetic sensors for setup without cover removal

Materials of Construction:

Enclosure:

Aluminumm, powder coated

Threaded/Flange Connection:

316 Stainless Steel

Process Insulator:

Teflon (PTFE)

O-Ring Seal:

Viton

Probes:

316 Stainless Steel

Remote Electronics:

16.4’ (5m) pre-wired interconnection cable

Dead Zones:

Single Cable/Rod

Dielectric = 80 (water)

Top = 15.75” (400mm)
Bottom = 0.8” (20mm)

Dielectric = 2.4 (oil)

Top = 19.7” (500mm)
Bottom = 3.9” (100mm)

Twin Cable

Dielectric = 80 (water)

Top = 9.8” (250mm)
Bottom = 0.8” (20mm)

Dielectric = 2.4 (oil)

Top = 13.0” (330mm)
Bottom = 0.8” (20mm)

Enclosure Rating:

ENCLOSURE TYPE 4X, IP66

Approvals:

Integral Electronics Only

Ordinary Location

CE Mark

Hazardous Location

CSA(US/C) Class I, Div 1,2, Groups B, C, D;
Class II, Div 1,2, Groups E, F, G; Class III

Remote Electronics

Ordinary Location

CE Mark

Hazardous Location

 

 

 

 
Warranty

Monitor Technologies LLC warrants each Flexar® guided wave radar continuous level measurement system and HMI2 it manufactures to be free from defects in material and workmanship under normal use and service within two (2) years from the date of purchase. The purchaser must give notice of any defect to Monitor within the warranty period, return the product intact and pre-paid transportation charges. The obligation of Monitor Technologies LLC under warranty is limited to repair or replacement at its factory. This warranty shall not apply to any product which is repaired or altered outside of the Monitor Technologies LLC factory, or which has been subject to misuse, negligence, accident, incorrect wiring by others or improper installation.
Monitor Technologies LLC reserves the right to change the design and/or specifications without prior notice.

 

 

 
Part Numbers / Product Configurations
Monitor Logo

Part # > Product Configuration
16-8111-1111 > FLEXAR,485,S-CBL,O/L,VHI,1-1/2 NPT
16-8111-1131 > FLEXAR,485,S-CBL,O/L,VHI,2"ANSI
16-8111-1141 > FLEXAR,485,S-CBL,O/L,VHI,DN50PN40
16-8111-1211 > FLEXAR,485,S-CBL,O/L,VLO,1-1/2 NPT
16-8111-1231 > FLEXAR,485,S-CBL,O/L,VLO,2"ANSI
16-8111-1241 > FLEXAR,485,S-CBL,O/L,VLO,DN50PN40
16-8111-2111 > FLEXAR,485,S-CBL,H/L,VHI,1-1/2 NPT
16-8111-2131 > FLEXAR,485,S-CBL,H/L,VHI,2"ANSI
16-8111-2211 > FLEXAR,485,S-CBL,H/L,VLO,1-1/2 NPT
16-8111-2231 > FLEXAR,485,S-CBL,H/L,VLO,2"ANSI
16-8112-1112 > FLEXAR,485,LL-CBL,O/L,VHI,1-1/2 NPT
16-8112-1113 > FLEXAR,485,LS-CBL,O/L,VHI,1-1/2 NPT
16-8112-1132 > FLEXAR,485,LL-CBL,O/L,VHI,2"ANSI
16-8112-1133 > FLEXAR,485,LS-CBL,O/L,VHI,2"ANSI
16-8112-1142 > FLEXAR,485,LL-CBL,O/L,VHI,DN50PN40
16-8112-1143 > FLEXAR,485,LS-CBL,O/L,VHI,DN50PN40
16-8112-1212 > FLEXAR,485,LL-CBL,O/L,VLO,1-1/2 NPT
16-8112-1213 > FLEXAR,485,LS-CBL,O/L,VLO,1-1/2 NPT
16-8112-1232 > FLEXAR,485,LL-CBL,O/L,VLO,2"ANSI
16-8112-1233 > FLEXAR,485,LS-CBL,O/L,VLO,2"ANSI
16-8112-1242 > FLEXAR,485,LL-CBL,O/L,VLO,DN50PN40
16-8112-1243 > FLEXAR,485,LS-CBL,O/L,VLO,DN50PN40
16-8112-2112 > FLEXAR,485,LL-CBL,H/L,VHI,1-1/2 NPT
16-8112-2113 > FLEXAR,485,LS-CBL,H/L,VHI,1-1/2 NPT
16-8112-2132 > FLEXAR,485,LL-CBL,H/L,VHI,2"ANSI
16-8112-2133 > FLEXAR,485,LS-CBL,H/L,VHI,2"ANSI
16-8112-2212 > FLEXAR,485,LL-CBL,H/L,VLO,1-1/2 NPT
16-8112-2213 > FLEXAR,485,LS-CBL,H/L,VLO,1-1/2 NPT
16-8112-2232 > FLEXAR,485,LL-CBL,H/L,VLO,2"ANSI
16-8112-2233 > FLEXAR,485,LS-CBL,H/L,VLO,2"ANSI
16-8113-1134 > FLEXAR,485,2-CBL,O/L,VHI,2"ANSI
16-8113-1144 > FLEXAR,485,2-CBL,O/L,VHI,DN50PN40
16-8113-1234 > FLEXAR,485,2-CBL,O/L,VLO,2"ANSI
16-8113-1244 > FLEXAR,485,2-CBL,O/L,VLO,DN50PN40
16-8113-2134 > FLEXAR,485,2-CBL,H/L,VHI,2"ANSI
16-8113-2234 > FLEXAR,485,2-CBL,H/L,VLO,2"ANSI
16-8114-1115 > FLEXAR,485,1-ROD,O/L,VHI,1-1/2 NPT
16-8114-1135 > FLEXAR,485,1-ROD,O/L,VHI,2"ANSI
16-8114-1145 > FLEXAR,485,1-ROD,O/L,VHI,DN50PN40
16-8114-1215 > FLEXAR,485,1-ROD,O/L,VLO,1-1/2 NPT
16-8114-1235 > FLEXAR,485,1-ROD,O/L,VLO,2"ANSI
16-8114-1245 > FLEXAR,485,1-ROD,O/L,VLO,DN50PN40
16-8114-2115 > FLEXAR,485,1-ROD,H/L,VHI,1-1/2 NPT
16-8114-2135 > FLEXAR,485,1-ROD,H/L,VHI,2"ANSI
16-8114-2215 > FLEXAR,485,1-ROD,H/L,VLO,1-1/2 NPT
16-8114-2235 > FLEXAR,485,1-ROD,H/L,VLO,2"ANSI
16-8121-1111 > FLEXAR,4-20,S-CBL,O/L,VHI,1-1/2 NPT
16-8121-1121 > FLEXAR,4-20,S-CBL,O/L,VHI,1-1/2 G
16-8121-1131 > FLEXAR,4-20,S-CBL,O/L,VHI,2"ANSI
16-8121-1141 > FLEXAR,4-20,S-CBL,O/L,VHI,DN50PN40
16-8121-1211 > FLEXAR,4-20,S-CBL,O/L,VLO,1-1/2 NPT
16-8121-1231 > FLEXAR,4-20,S-CBL,O/L,VLO,2"ANSI
16-8121-1241 > FLEXAR,4-20,S-CBL,O/L,VLO,DN50PN40
16-8121-2111 > FLEXAR,4-20,S-CBL,H/L,VHI,1-1/2 NPT
16-8121-2131 > FLEXAR,4-20,S-CBL,H/L,VHI,2"ANSI
16-8121-2211 > FLEXAR,4-20,S-CBL,H/L,VLO,1-1/2 NPT
16-8121-2231 > FLEXAR,4-20,S-CBL,H/L,VLO,2"ANSI
16-8122-1112 > FLEXAR,4-20,LL-CBL,O/L,VHI,1-1/2 NT
16-8122-1113 > FLEXAR,4-20,LS-CBL,O/L,VHI,1-1/2 NT
16-8122-1122 > FLEXAR,4-20,LL-CBL,O/L,VHI,1-1/2 G
16-8122-1123 > FLEXAR,4-20,LS-CBL,O/L,VHI,1-1/2 G
16-8122-1132 > FLEXAR,4-20,LL-CBL,O/L,VHI,2"ANSI
16-8122-1133 > FLEXAR,4-20,LS-CBL,O/L,VHI,2"ANSI
16-8122-1142 > FLEXAR,4-20,LL-CBL,O/L,VHI,DN50PN40
16-8122-1143 > FLEXAR,4-20,LS-CBL,O/L,VHI,DN50PN40
16-8122-1212 > FLEXAR,4-20,LL-CBL,O/L,VLO,1-1/2 NT
16-8122-1213 > FLEXAR,4-20,LS-CBL,O/L,VLO,1-1/2 NT
16-8122-1222 > FLEXAR,4-20,LL-CBL,O/L,VLO,1-1/2 G
16-8122-1232 > FLEXAR,4-20,LL-CBL,O/L,VLO,2"ANSI
16-8122-1233 > FLEXAR,4-20,LS-CBL,O/L,VLO,2"ANSI
16-8122-1242 > FLEXAR,4-20,LL-CBL,O/L,VLO,DN50PN40
16-8122-1243 > FLEXAR,4-20,LS-CBL,O/L,VLO,DN50PN40
16-8122-2112 > FLEXAR,4-20,LL-CBL,H/L,VHI,1-1/2 NT
16-8122-2113 > FLEXAR,4-20,LS-CBL,H/L,VHI,1-1/2 NT
16-8122-2132 > FLEXAR,4-20,LL-CBL,H/L,VHI,2"ANSI
16-8122-2133 > FLEXAR,4-20,LS-CBL,H/L,VHI,2"ANSI
16-8122-2212 > FLEXAR,4-20,LL-CBL,H/L,VLO,1-1/2 NT
16-8122-2213 > FLEXAR,4-20,LS-CBL,H/L,VLO,1-1/2 NT
16-8122-2232 > FLEXAR,4-20,LL-CBL,H/L,VLO,2"ANSI
16-8122-2233 > FLEXAR,4-20,LS-CBL,H/L,VLO,2"ANSI
16-8123-1134 > FLEXAR,4-20,2-CBL,O/L,VHI,2"ANSI
16-8123-1144 > FLEXAR,4-20,2-CBL,O/L,VHI,DN50PN40
16-8123-1234 > FLEXAR,4-20,2-CBL,O/L,VLO,2"ANSI
16-8123-1244 > FLEXAR,4-20,2-CBL,O/L,VLO,DN50PN40
16-8123-2134 > FLEXAR,4-20,2-CBL,H/L,VHI,2"ANSI
16-8123-2234 > FLEXAR,4-20,2-CBL,H/L,VLO,2"ANSI
16-8124-1115 > FLEXAR,4-20,1-ROD,O/L,VHI,1-1/2 NPT
16-8124-1135 > FLEXAR,4-20,1-ROD,O/L,VHI,2"ANSI
16-8124-1145 > FLEXAR,4-20,1-ROD,O/L,VHI,DN50PN40
16-8124-1215 > FLEXAR,4-20,1-ROD,O/L,VLO,1-1/2 NPT
16-8124-1235 > FLEXAR,4-20,1-ROD,O/L,VLO,2"ANSI
16-8124-1245 > FLEXAR,4-20,1-ROD,O/L,VLO,DN50PN40
16-8124-2115 > FLEXAR,4-20,1-ROD,H/L,VHI,1-1/2 NPT
16-8124-2135 > FLEXAR,4-20,1-ROD,H/L,VHI,2"ANSI
16-8124-2215 > FLEXAR,4-20,1-ROD,H/L,VLO,1-1/2 NPT
16-8124-2235 > FLEXAR,4-20,1-ROD,H/L,VLO,2"ANSI
16-8131-1111 > FLEXAR,485/4-20,S-CBL,O/L,VHI,1-1/2
16-8131-2111 > FLEXAR,485/4-20,S-CBL,H/L,VHI,NPT
16-8132-1112 > FLEXAR,485/4-20,LL-CBL,O/L,VHI,NPT
16-8132-1113 > FLEXAR,485/4-20,LS-CBL,O/L,VHI,NPT
16-8132-1132 > FLEXAR,485/4-20,LL-CBL,O/L,VHI,2"AN
16-8132-1212 > FLEXAR,485/4-20,LL-CBL,O/L,VLO,NPT
16-8132-2112 > FLEXAR,485/4-20,LL-CBL,H/L,VHI,NPT
16-8132-2113 > FLEXAR,485/4-20,LS-CBL,H/L,VHI,NPT
16-8132-2132 > FLEXAR,485/4-20,LL-CBL,H/L,VHI,2"AN
16-8221-1111 > FLEXAR,RMT,4-20,S-CBL,O/L,VH1,1-1/2
16-8222-1112 > FLEXAR,RMT,4-20,LL-CBL,O/L,1-1/2 NT
16-8222-1212 > FLEXAR,RMT,4-20,LL-CBL,O/L,1-1/2 NT
16-8231-1211 > FLEXAR,RMT,485/4-20,S-CBL,O/L,VLO,1


 

Last Rev.: 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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