Klinger Davis Magnetic Level Gauge

Davis Klinger Magnetic Level Gages

Davis Klinger Magnetic Level Gages

Training and Information Presentation

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Founded in 1933, Davis Controls is a distributor, representative and licensed assembler for international manufacturers of instrumentation and control products. The company offers a comprehensive range of products for the industrial market.

Davis manufactures Klinger Magnetic Level Gages and supplies them to the North American market through a network of local distributors and representatives throughout the United States and Canada.

Davis Controls has established a leading position in the instruments and controls market, and has a strong financial foundation to support this business. Extensive company owned facilities in Oakville, Ontario Canada include warehousing, service, information management and an EDI network connecting customers, suppliers and representatives.

The mission of Davis Controls, now as in 1933, is to offer:

Expert application advice and information to our customers Extensive service and technical backup State-of-the-art products in all areas of control and instrumentation

IndexIndex

The Operation Design Consideration The Klinger System Klinger Float System Klinger Display Float Failure Indicator Design & Application

Features & Application MLG Configurations Accessories & Options Approvals MLG-RFQ Order Information Application Notes

OPERATIONOPERATION

The Magnetic gage is designed so that the liquid being measured is enclosed within a sealed chamber. A stainless steel, titanium or plastic float fitted with a permanent Omni-directional magnet moves freely inside the chamber and actuates the magnetic wafers within the indicator. As the float rises or falls with the liquid level each wafer rotates 180 deg. and so presents a contrasting color. Those wafers above the float show white, while those level and below show red - the indication then presents a clearly defined and accurate level of liquid in the chamber. The wafers resist accidental disturbance (e.g. vibration) due to their edge magnetization and mutual attraction.

Design ConsiderationDesign Consideration

Magnetic Level Gages, depend not only on the integrity of the chamber, but also on the float design and the ability to satisfy all design parameters, i.e specific gravity, pressure and temperature, without compromising the magnetic linkage to the display and associated controls.

Many competitive systems sacrifice display performance by using smaller and weaker magnet systems to achieve low SG and higher pressures, invariably with detrimental effect. Others use guided and vented floats to achieve the same result, which again can prove limiting and troublesome.

Davis-Klinger Engineered Davis-Klinger Engineered Magnetic SystemMagnetic System

The Klinger system, built on many years experience, has taken these factors into consideration in designing out these problem areas. This unique system uses a patented ferrite molded wafer system, which combined with a sealed guide-free float carrying a powerful Omni-directional magnet system, provides ultimate performance and reliability, even under the most arduous conditions.

Magnetic Level Gages SystemMagnetic Level Gages System

Fig.1 Close-up of the Davis Klinger Gage.

It operates by magnetic interaction with float inside the chamber.

There is no requirement for separate piping and so the risk of leakage and environmental problems is greatly reduced.

Davis-Klinger Float SystemDavis-Klinger Float System

The Klinger System employs a non-guided float. To eliminate the potential of float drag and hang up caused by friction, surface tension and particle build up on the inner wall of the gage chamber, Klinger utilizes metal bumpers. The bumpers (1/16” stiff wire) protect the float from friction wear while continuously cleaning the internal wall of the gage, keeping it free from particulate build up. Bumpers also keep the float centered in the chamber.

The Klinger Float SystemThe Klinger Float System

Klinger system employs a sealed float madefrom stainless steel as standard withstainless steel reinforcing rings; specialtymaterials available upon request. The float’slaser weld is offset inside to reduce frictionand to prevent it from rubbing on the innerChamber wall, thus insuring long float andchamber life. Klinger uses a verticallyinstalled Omni-direction float magnetsystem. Superior to horizontally installedunidirectional magnets, Klinger’s omni-directional magnetic system,regardless of the orientation of the float,always interacts with the molded ferrite

wafers to display accurate visual information.

The Klinger DisplayThe Klinger DisplayThe Klinger wafer magnetization technique is protected by U.S., Canadian and UK patents. This unique system consisting of 1” wide molded ferrite wafers, remains magnetically locked in the vertical position until disturbed by the greater magnetic force of the float magnet. The magnetized wafers interlock with each other eliminating the problems caused by vibration. Other non-patented wafer designs can rotate randomly displaying incorrect or confusing visual level information.

The Klinger design has the largest (1” wide) and easiest to read display on the market (red and white are standard but green and other colors are also available). Research shows that red and white offer the best visual contrast while creating the least chance of washout caused by bright lighting or glare from the sun.

Davis-Klinger Patented Float Davis-Klinger Patented Float Failure IndicatorFailure Indicator

Klinger is the only manufacturer providing

float failure indication.Float failure is a

potential problem with any magnetic level

gage.If leakage into the float occurs, or if

sediment accumulates on top of the float, it will

sink to the bottom of the chamber. In all other

designs, the float’s sinking to the bottom of the

chamber causes the display to indicate that the

vessel is empty. Only the Klinger design has an

alarm indicator located at the bottom of the

display which warns that the float has failed,

not that the vessel is empty.

Float Failure IndicatorFloat Failure Indicator

Klinger Design & ApplicationKlinger Design & Application Immediate and accurate response to level changes,

giving clear and sharp legibility. Continuous control of liquid level Local and remote display Alarm switching Robust, shockproof and completely sealed for safety No leakage to atmosphere Particularly suitable for dangerous or toxic fluids Ideal for liquid interface applications Powerful omni-directional magnet system-

guide free float Display can be rotated through 360 degrees

irrespective of float position

Klinger Design & ApplicationKlinger Design & Application Automatic float failure warning Graduated Scale High pressure capability-up to 3000 psig High temperature capability standard up to

400 deg c / 752 deg f Standard SG range 0.4-2.2 Unlimited length Top mounted options Lined gages and PP, PVDF, PVC fiberglass

versions Simple to specify and easy to install Eliminates preventative maintenance

An economical alternative to Conventional gages and other level measuring device.

Features and SpecificationsFeatures and Specifications

Versatility The simple concept of the Klinger

Magnetic Gages allows for flexible design to adapt to a variety of installation needs. Gages can be manufactured to an almost unlimited length and in any configuration

Sealed Chamber fabricated from seamless pipe with full penetration welds.

Hydrostatically tested to 1.5 x the design pressure

MLG-Standard ConfigurationMLG-Standard Configuration

1. Standard 2" sch 10 or 40, 2-1/2" schule 80 chambers fabricated from seamless pipe

2. Optional 1-1/4" chambers available

3. Standard vessel connections flanged 3/4", 1",1-1/2" and 2" ANSI 150/300/600/900

4. Drain and vent connectors normally plugged 1/2" NPT

5. Various connection configurations available on request.

6. Suitable for use with 3/4" to 2" gate, globe or ball valves.

7. Maximum single length 6m/20ft

8. Gages over 3.5m/20ft. will need intermediate supports

9. Higher temperature and pressure ratings available on request.




Accessories/OptionsAccessories/Options Alternative chamber and float materials Polycarbonate display housing (max temp 135 C/275 F) Epoxy coated indicator assembly Graduated scales Alarm Switches Transmitters Steam heating Non frost blocks Insulation jackets Mating flanges, joints, bolts, etc.

Accessories-Graduated ScaleAccessories-Graduated Scale

Alarm SwitchesAlarm Switches

The switches can be fitted to the gage at any level providing alarms at high, low and intermediate points.

DRS3 SwitchDRS3 Switch

DRS3 Explosion Proof: CSA (NRTL) APPROVED FOR HAZARDOUS LOCATIONS CLASS 1 DIVISION 1 GROUP C&D CLASS 2 DIVISION 1 GROUP E, F, & G

Electrical Ratings:

Voltage: 120VAC MAXSwitching Power: 25 WATTS OR VA MAX.

A Snubber or Suppressor must be used across all inductive loads (Relays)Temperature: 212 DEG F OR 100 DEG C MAX

DRS3R SwitchDRS3R Switch

DRS3R

Explosion Proof: CSA (NRTL) APPROVED FOR HAZARDOUS LOCATIONS CLASS 1 DIVISION 1 GROUP C&D CLASS 2 DIVISION 1 GROUP E, F, & G

Electrical Ratings:

Voltage: 120VAC MAXSwitching Power: 10 AMPS MAX (THROUGH RELAY CONTACTS)Temperature: 212 DEG F OR 100 DEG C MAX

TransmittersTransmitters

Transmission and control for remote

display can be offered complete with

original equipment package or retro-fitted to

an existing Klinger Magnetic Level Gages.

KM288 TransmitterKM288 TransmitterKM288 Liquid Level Transmitter

Two wire 4-20 mA current loopStandard 10mm resolution (5 mm optional)Remote display and controlTransmit up to 6 KmNo media contactSimple ApplicationEasy retrofit on existing applicationCost effective level measurement deviceBASEEFA Approved EExia llc T4 and ExNllc T4CSA approved EXia Class 1 Groups A, B, C, and DFM Approved for IS

SpecificationsSupply Voltage: 10-30 Vdc. Polarity ProtectedOutput 4-20 mA (profiled optional)Float warning>2.4mAConnection via epoxy coated aluminum headIP 65/NEMA 4 ProtectionLengths to suit magnetic level gageMultiple Section above 3.5 M

DMTM4 TransmitterDMTM4 Transmitter

sensing element. At any time, the sensor element and electronics housing may be removed from the gage chamber without disturbing the operation of your process or your local display. A 4 to 20 mA output is available for analog indication of level measurement. HART communication allows the DMTM4 Series transmitter to indicate and display Measurement variables simultaneously. Set-up, calibration and diagnostics are available from any point in the loop using a standard HART hand-held terminal.An optional on-board display and keypad is also available for local indication and programming. The DMTM4 transmitters are available in lengths up to 25 feet. All of our transmitters use magnetostrictive technology and have only one moving part-the float. This simple design ensures no scheduled maintenance or recalibration will be required.

DMTM4 Series liquid level transmitter offers you unsurpassed flexibility to meet most process application conditions. The DMTM4 Series transmitter features a removable

DMTM4 SpecificationsDMTM4 Specifications

Parameter SpecificationsOutput 4-20 mA with HARTFull Range 0.5 to 25 ft. (152 mm to 7.6 m)Minus 3 in. (76.2 mm)

inactive zone and 5 in. (127 mm) for mountingNon-linearity 0.020 % F.S. (Independent best straight line) or 1/32 in.

(0.794 mm)Repeatability 0.005 % F.S. or 0.005 in. (0.127 mm)

Sensor Operating Temp: -40 to 300 degrees F (-40 to 149 degrees C)Input Voltage Range: 10.5 to 36.1VdcReverse Polarity Protection: Series diodesTransient Protection: Stage 1: line-to-ground surge suppressors; 2500 Amps peak

(8/20 µsec.)Stage 2: line-to-line and line-to-ground

ApprovalsApprovals

Lloyds, TUV, SA, CEGB, BASEEFA, CSA, NRTL/UL. FM

All fabrication & testing is in accordance with

ASME section VIII & CSA standard B51

MLG-RFQ/Order InformationMLG-RFQ/Order Information

SPECIFY APPLICATION Fluid Specific Gravity Working Pressure Working Temperature Center to Center Dimension M-dim Vessel Connections : Flanged, screwed or welded stub pipe.

Size and rating. Style and Configuration

MLG Order FormMLG Order Form

See Back Page of The Davis Controls Magnetic Level Gages Brochure

for complete details.

Application NotesApplication Notes

Fig. 1 Glass sight gages often used on condensate drain tanks. Note float switches and valving may be eliminated with use of switches Integral with a magnetic gage.

Photo from Bruce Nuclear Generating Station


Pickering Nuclear Generating Station.

Fig. 2 Magnetic Level Gage with the liquid level clearly shown.


Fig. 1 Paul Grenfell, Chairman of Davis Controls Ltd. inspect one of the new Magnetic level Gages installation on the de-aerator tanks at the Chicago Mayfair Pumping station.Water level visibility is excellent. Note also the high and low alarm switches, and the 4-20mA transducer strapped to the gage. These functions were not convenient or practical with the glass gages which the magnetic gages have replaced.

The Best Magnetic Level Gages The Best Magnetic Level Gages in the Worldin the World

Klinger Davis Magnetic Level Gauge

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