Displacer Type Liquid Level Switches D E S C R I P T I O N Magnetrol® displacement type level switches offer the industrial user a wide choice of alarm and control configurations. Every unit utilizes a simple buoyancy principle and is well suited for simple or complex applications, such as foaming or surging liquids or agitated fluids, and usually costs less than other types of level switches. F E A T U R E S • Narrow or wide level ranges achieved through multiple switch mechanism capability. • Displacers adjustable at any point along the suspension cable. • 10 feet (3 meters) suspension cable standard • Anti-surge design eliminates the possibility of switch shortcycling • Flanged or threaded mounting available • Easy installation • Field adjustable set point and switch differential Displacer Level Switch Displacer Level Switch with PROOF-ER • NACE models • Floating rooftop models • Proof-er® ground check • Choice of displacers: Porcelain, 316 Stainless steel, Karbate, Brass. • Choice of switch mechanisms: Dry contact, Pneumatic, Hermetically sealed • Foaming or surging liquids • Available housings: NEMA 1, carbon steel for pneumatics; TYPE 4X/7/9, Class I, Div. 1, Groups C & D, polymer coated aluminum; TYPE 4X/7/9, Class I, Div. 1, Group B, polymer coated aluminum • Agitated fluids • Sewage handling • Dirty liquids • Paints • Varnishes • Heavy oils • Liquids with solids

T E C H N O L O G Y Operation is based upon simple buoyancy, whereby a spring is loaded with weighted displacers which are heavier than the liquid. Immersion of the displacers in the liquid results in buoyancy force change, which moves the spring upward. Return Spring Since the spring moves only when the level moves on a displacer, spring movement is always a small fraction of the level travel between displacers . A magnetic sleeve is connected to the spring and operates within a non-magnetic barrier tube . Spring movement causes the magnetic sleeve to attract a pivoted magnet , actuating a switch...

SERIES A10 PUMP OR VALVE CONTROL WIDE DIFFERENTIAL TYPE SERIES A15 LEVEL ALARM APPLICATIONS NARROW DIFFERENTIAL TYPE These wide differential units are factory calibrated to actuate as a liquid level reaches a given displacer and to deactuate when the level reaches a second displacer. These instruments are factory calibrated to operate over a narrow level differential band and are ideally suited for liquid level alarm applications on either high or low level. The minimum differential band is approximately 6 in. (152 mm) in water and varies somewhat with liquid specific gravity. The maximum differential...

APPROVED MODEL AREA CLASSIFICATION All with an electric switch mechanism and a housing listed as Type 4X/7/9 Class I, Div 1, Groups C & D Class II, Div 1, Groups E, F & G All with an electric switch mechanism and a housing listed as Type 4X/7/9 Class I, Div 1, Group B Class I, Div 1, Groups B, C & D Class II, Div 1, Groups E, F & G All with a Series HS or F electric switch mechanism and a housing listed as CSA Type 4X All with an electric switch mechanism and a housing listed as Type 4X/7/9 Class I, Div 1, Groups C & D Class II, Div 1, Groups E, F & G All with an electric switch mechanism and...

SERIES B, C, D, O & Q DRY CONTACT SWITCHES • Series “B”, “C”, “O” and “Q” switches are general purpose units with a selection of maximum liquid temperature ratings • Series “D” switch is designed for high DC current applications SERIES J & K PNEUMATIC SWITCHES • Suited for process industry applications in hazardous locations or where electrical power is not available • Series “J” bleed type switch is intended for general purpose applications • Series “K” switch is specially designed to provide non-bleed operation with a high degree of vibration resistance SERIES HS, F & 8 HERMETICALLY SEALED...

INCHES (MM) Outline Dimensions Threaded Mounting Flanged Mounting A B A B Displacer Type Porcelain Stainless Steel or Karbate Stainless Steel or Karbate Displacer Type Electrical Connections TYPE 4X/7/9, Group B: 1" NPT NEMA 1 Pneumatic: 1⁄4" NPT STANDARD ACTUATING LEVELS AND LIQUID SPECIFIC GRAVITY Displacer Type Stainless Steel or Karbate Stainless Steel Plug Flange Rising Level Actuation D Falling Level Actuation Model A10 with Threaded Mounting Rising Level Actuation D Falling Level Actuation Model A10 with Flanged Mounting

INCHES (MM) Outline Dimensions Threaded Mounting Flanged Mounting A B A B Displacer Type Porcelain Stainless Steel or Karbate Stainless Steel or Karbate Displacer Type Electrical Connections TYPE 4X/7/9, Group B: 1" NPT NEMA 1 Pneumatic: 1⁄4" NPT STANDARD ACTUATING LEVELS AND LIQUID SPECIFIC GRAVITY 0.50 Displacer Liquid Temp. Type °F Stainless Steel or Karbate Stainless Steel *See page 21 for PROOF-ER and/or floating rooftop switch dimensions. A Min. Rising Level Actuation Falling Level Actuation Model A15 with Threaded Mounting Rising Level Actuation Falling Level Actuation Model A15 with Flanged...

INCHES (MM) Outline Dimensions Threaded Mounting Flanged Mounting A B A B Displacer Type MODEL B10 WITH DISPLACER ARRANGEMENTS 3, 4, AND 5 Displacer Type Stainless Steel or Karbate Stainless Steel or Karbate MODEL B10 WITH DISPLACER ARRANGEMENTS 1 AND 2 Displacer Type Stainless Steel or Karbate Plug Flange Model B10 with Threaded Mounting Model B10 with Flanged Mounting

MODEL BIO ACTUATION LEVELS BIO STANDARD ACTUATING LEVELS AND LIQUID SPECIFIC GRAVITY WITH DISPLACER ARRANGEMENT 1

INCHES (MM) B10 STANDARD ACTUATING LEVELS AND LIQUID SPECIFIC GRAVITY WITH DISPLACER ARRANGEMENT 1 (cont.) Displacer Type Stainless Steel and Karbate Stainless Steel Upper Switch Actuation G Lower Switch Actuation Actuation Lower Switch Actuation Model B10 Displacer Arrangement 1 Model B10 Displacer Arrangement 2