Level Switches

Level Switches are sensors with an electrical contact output at a specific liquid, powder or bulk level. Capacitive, conductive, diaphragm, displacer, float, inductive, optical, paddle, vibrating rod, tilt, and tuning fork models are the different types of level switches available.

Capacitive

Capacitive sensors with an electrical contact output at a specific liquid, powder, or bulk level.

Model CLS1 Capacitance Level Switch For Solids, Liquids or Slurries, Fail-Safe Protection, <1 pF Sensitivity Electronics provide highly sensitive measurement detection (requires less than a 1 picofarad shift from ambient) State of the art technology ignores material build-up on the vessel sidewall or along the probe assembly	Series CLS2 Capacitive Level Switch Powder, Bulk, or Liquids, Auto-Calibration Automatic Calibration: No need to turn calibration pots, just push the calibration button. The CLS2 even has an external magnet to activate the calibration without having to open the enclosure. Universal Power Supply: One model works from 12 to 240 VAC/DC without any jumpers or settings	Series NCS-10 Through Wall Capacitive Sensor Non-Contact, Thin Profile Level Sensor Thin profile capacitive level sensor Withstands electrostatic discharge up to 40 KV Sensing distance: 0.039-0.39" (1-10 mm) Teach-in of sensing distance via push-button or wire-input Selectable make or break switching by means of teach-in function
	Model FCLS Flush Capacitance Level Switch Maintenance Free, Economical, Flush Mounting Ideal for level measurement of liquids and bulk solids to trigger an alarm or close a filler inlet. No probe design allows for installation where space is constrained or where material flow or material build up would damage a probe

Conductivity

Conductivity sensors with an electrical contact output at a specific liquid level.

Model DPL110 Dual Point Level Switch

Tank High/Low Control, Conductivity Technology, Up to 72" Probes

Contains no moving parts to get stuck or wear out
Easily adjustable sensitivity for added application flexibility
DIN rail-mountable socket mount for easy install

Series LLC Conductivity

Controller

Single Point or Differential Level Service, Compact Size, Up to 6 ft. (1.82 m) Probes

Determine your supply voltage. Select between 120 and 240 VAC.
Determine the required sensitivity. Select between 10K Ω and 26K Ω.
Determine the socket style. Select between 8-pin octal and DIN mount.

Series CLP Conductivity Level

Probe

Low Cost, Compact Design

Mount in any orientation in a tank, tee fitting, or any compatible threaded port for easy installation
Probe end is solid stainless steel allowing substantial resistance to heat and corrosion
Ceramic insulator allows for high degree of isolation

Diaphragm

Diaphragm sensors with an electrical contact output at a specific powder or bulk level.

Ultra-Mag™ Explosion-proof Level Switch

For Powder & Bulk Solids

Uses a unique magnetic linkage which isolates the electrical compartment from controlled product, reducing maintenance and improving sensitivity
Sealed switch compartment and sealed leads yield the exceptionally reliable operation.
A wide selection of diaphragms and switches is available with choices of flange or suspension mounting to fit a specific application
Extremely sensitive indication and very economical
Magnetic linkage makes this simple explosion-proof diaphragm switch the most rugged and reliable level control for a variety of products

Displacer

Displacer sensors with an electrical contact output at a specific liquid level.

Series 190 Single Stage Top Mount

Displacer Type Level Control

Fixed or Adjustable Deadband,

For Pumps or Alarms

Extremely versatile design
Displacers are suspended on a coil spring and do not float on the surface of liquids and are unaffected by turbulence or pressure
Excellent for applications with viscous or dirty liquids

Series 195 Two Stage Top Mount

Displacer Type Level Control

Fixed or Adjustable Deadband,

For Pumps or Alarms

Work on the principle that submerged solids weigh less in liquids, and as the liquid level rises and their weight decreases, the tension on the spring by which they are suspended is decreased.
Because they work on a different principle than float type liquid level controls, displacers are not affected by turbulence or pressure, and are excellent for applications with viscous or dirty liquids.

Float

Float sensors with an electrical contact output at a specific liquid level.

Series CFS2 Cable Float Switch Mercury-Free, UL/CSA Approval Options High reliability with mercury-free, magnetic, mechanical internal design Economical pricing with multiple option available for increased versatility Easy installation with counterweights and cable hangers to suit a variety of mounting applications	Series FSW2 Free-Floating Level Switch Designed for Industrial Applications, Mercury-Free, Self Counter-Weighted Body is free of any irregularities allowing substances to effortlessly glide off and consists of a double airtight chamber with high-pressure melted polypropylene re-injection sealing to ensure a perfect seal reducing maintenance events	Series F6 & F7 Level Switches Horizontal/Specialty Low Cost, Hermetically Sealed Contacts Hermetically sealed reed switches are actuated by magnets permanently bonded inside the float arm and can be easily adapted to open or close a circuit on rising or falling levels
Series F6 & F7 Level Switches Vertical Low Cost, Reliable and Compact, Hermetically Sealed Contacts Combine low cost and reliability with fast, simple installation Hermetically sealed reed switches are actuated by magnets permanently bonded inside the float and can be easily adapted to open or close a circuit on rising or falling levels	Model F7-MLK2 Multi-Level Switch Kit 316 Stainless Steel, One or Two Station Level Switch, Vertically Mount Contains all the components necessary for the design and fabrication of a 1 or 2 station level switch for pipe plug mounting. The user can customize stem length (maximum 36"), actuation point, distance between floats, and lead wire lengths.	Model F7-MLK Multi-Level S witch Kit One or Two Station Level Switch, Vertically Mount Customize stem length (maximum: 36"; minimum: 11"), actuation point, distance between floats, and lead wire lengths Includes two level stations (switch, tube, and Buna-N float), two brass extension tubes 12" length, four brass tube unions, one end fitting, and one mounting plug
Series F7-MM Miniature Multi-Station Level Switch Custom, Lightweight, Low Cost, 316 SS or Buna-N Floats Customized miniature level indication in a compact, lightweight design ideal for tanks less than 4' (1.2 m) deep Rugged construction with multiple options yielding exceptional versatility Miniature custom level switches are sturdy, compact and lightweight yet still rugged and durable	Series F7-MQ Quick-Ship Multi-Station Level Switch Fast Delivery, Customized, Up to Four Actuation Levels Customized level indication quickly and affordably Rugged construction with multiple options yielding exceptional versatility Capable of supporting larger, more buoyant floats Durable construction asserts long reliability in contaminated or turbulent media	Series F7-MS Multi-Station Level Switch Customize To Fit Application, Up to Six 316 SS or Buna-N Floats Customized level indication quickly and affordably Rugged construction with multiple options yielding exceptional versatility Capable of supporting larger, more buoyant floats Durable construction asserts long reliability in contaminated or turbulent media
Series L4 FLOTECT® Float Switch Magnetically Operated Switch, Leak Proof Body, Explosion-Proof Leak proof body machined from bar stock Choice of floats dependant on maximum pressure and specific gravity Weatherproof, designed to meet NEMA 4 Explosion-proof	Series L6 FLOTECT® Liquid Level Switch Easy In-wall or External Installation, Up to 2000 psig (138 bar) Leak proof lower body machined from bar stock Choice of models for direct side wall mounting or mounted in a tee to act as an external float chamber Weatherproof and explosion-proof body for demanding outdoor applications	Series L8 FLOTECT® Liquid Level Switch Low Cost, Leak Proof Body, Excellent Chemical Resistance Features a leak proof body and float constructed from tough, durable polyphenylene sulfide which has excellent chemical resistance Liquid level snap switch is magnetically actuated with no direct mechanical linkage to leak or fail, assuring longer life and decreased maintenance costs
Series L10 FLOTECT® Mini-Size Level Switch Easy In-wall or External Installation, Specific Gravities as Low as 0.5 Hermetically sealed, magnetically actuated SPST reed switch which is encapsulated in a polypropylene housing Simple field switch adjustment allows user to toggle between normally open (NO) or normally closed (NC) with no change in the electrical connection	Series 102/1102 Flanged Chamber Type Level Control Operating Pressures to 300 PSIG Unique design allows the simple removal of four bolts from the inspection plate to examine the float and chamber for cleaning or wear without disconnecting the piping or electrical circuitry	Series 123/125 Boiler Water Level Control Heavy Duty, Cast Iron Chamber Special snap action switch mechanism options eliminates frequent operation due to surging water level Transparent cover provides convenient visible operation of the switch Flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping
Series 201/203/204 Side Mounted-Chamber Type Level Control Operating Pressures to 500 psig, 34 bar, Hermetically Sealed Snap Switch Option Long life and reliable operation is inherent in the design of the 201 series. The heavy duty welded carbon steel chamber provides a control to operate up to 1000 psi (69 bar) and process temperature up to 750°F (400°C), 400°F (205°C) at the electrical head assembly.	Series 205 Welded Construction External Mount Pressures to 1250 psi (86 bar) at Temperatures to 650°F (343°C), Optional Explosion-Proof Enclosures, Hermetically Sealed Switches Long life and reliable operation is inherent in the design of the 205 series. The heavy duty welded carbon steel chamber provides a control to operate up to 1250 psi (86 bar) and process temperature up to 650°F (343°C), 400°F (205°C) at the electrical head assembly.	Series 211/213/214 Flanged Chamber Level Control External Mount, Pressure to 450 psig (31 bar), Temperature to 500°F (260°C) A removable stainless steel float enclosed in a flanged carbon steel chamber is featured in the durable, field proven 211 Series. External side mount series includes 1" NPT process connections as standard, or with socket weld hubs; or, 1" flanges as options.
Series 215/217/218 Flanged Chamber Level Control Adjustable Deadband 12" to 24", Pressure to 450 psig (31 bar), Temperature to 500°F (260°C) Adjustable deadband, flanged chamber and side mount are featured in the heavy duty reliable 215 series. A choice of four operating styles are offered: 1. Single stage; 2. Two stage operation; 3. Fixed lower stage ; 4. Fixed upper and lower stage	Series 221/223/224 Flanged Chamber Level Control External Mount, Pressure to 1000 psig (69 bar) and Temperature to 475°F (246°C) Heavy duty flanged chamber features removable float for ease of inspection and maintenance. The 221 Series also provides 1" NPT for standard external mounting. Socket weld hubs or flanges are optional.	Series 225/227/228 Flanged Chamber Adjustable Deadband 12" to 24", Pressure to 1000 psig (68.9 bar), Temperature to 475°F (246°C), Hermetically Sealed Switches Single stage adjustable deadband suitable for pump operation Two stage operation with adjustable lower stage, fixed upper stage for pump and high alarm Fixed lower stage and adjustable upper stage for pump and low alarm
Series 251/253/254 Welded Chamber Level Control External Mount Pressure to 1250 psig (86 bar), Hermetically Sealed Switches, Temperature to 750°F (400°C), Explosion-Proof Housings Time proven magnetic head leak proof construction combines with a heavy duty welded chamber to provide excellent reliability for control of compatible liquids. Operating pressures of 1250 psig (86 bar) at 650°F (345°C) and 750 psig (52 bar) at 750°F (400°C) are standard.	Series 291/293/294 Welded Chamber Level Control Single Stage, Low Cost, Hermetically Sealed Snap Switches Inexpensive yet rugged construction in a welded chamber control. The 291 series is specifically designed for single stage operation where pressure does not exceed 350 psig (24 bar) at 100°F (38°C) or 300 psig (21 bar) at 600°F (315°C)	Series 301 Top Mount Float Type Level Control Single Stage for Alarms, Depth to 12 ft. These units feature a fixed deadband for high or low alarm or shutdown. This control can be mounted on top of any closed or open tank or sump by use of the 3/4" NPT connection. Flanges are also available in various sizes, pressure rating and material to meet any installation.
Series 391/393/394 Side Mounted-Chamber Type Level Control Compact, Low Cost, Hermetically Sealed Snap Switch Option Stainless steel switching mechanism uses gravity return action instead of springs for long life. Weatherproof enclosure is standard. Welded steel chamber is good for 650 psig (45 bar) at 600°F (315°C).	Series 401 Top Mount Float Type Level Control Single or Two Stage for Pump or Alarm, Depth to 12', Specific Gravity to 0.50 These heavy duty top-mounted liquid level controls operate in pressurized or non-pressurized tanks and sumps with pressures to 600 psi and temperatures to 500°F. They can be ordered to operate at depths to 12 feet with a 12 foot guide rod.	Series 500 Insertion Type Level Control Adjustable Deadband, Weatherproof Enclosure Adjustable deadband combined with direct 2-1/2" threaded or 2-1/2" flange mount makes the reliable, heavy duty 500 Series ideal for liquid level control in large or small tanks. Chambers are available in cast iron, cast steel or cast 316 stainless steel to meet the most demanding application.
Series 1211/1213/1214 Flanged Chamber Level Control External Mount, Pressure to 450 psig (31 bar), Temperature to 500°F (260°C) Low minimum specific gravity of 0.40 and rugged flanged chamber for inspection purposes helps insure superior long term performance. Control can be used at maximum process pressure of 450 psig (31 bar) at 100°F (38°C), and 300 psig (21 bar) at 500°F (260°C).	Series 1221/1223/1224 Flanged Chamber Level Control External Mount, Pressure to 1000 psig (69 bar), Temperature to 475°F (246°C), Minimum Specific Gravity 0.40 Low specific gravity and superior long term performance make this Series ideal for applications which require operation at specific gravities as low as 0.40. This Series also provides a heavy duty flanged chamber with removable stainless steel float for easy inspection and maintenance.	Series 1241/1243/1244 Flanged Chamber External Mount, Pressure to 1440 psig (99 bar), Hermetically Sealed Switches and Temperature to 475°F (246°C) A removeable stainless steel float enclosed in a flanged carbon steel chamber is featured in the durable, field proven 1241 series. External side mount series includes 1" NPT process connections as standard or 1" flanges as options. Pressure and temperature limits are 1440 psi (99 bar) at 100°F (38°C) and 1275 psi (87.9 bar) at 475°F (246°C).
Series 1251/1253/1254 Welded Chamber Level Control Min. Specific Gravity 0.40, Pressure to 1250 psig (86 bar), and Temperature to 500°F (260°C) Leak proof all welded heavy duty carbon steel bodies coupled with snap action or mercury switches provide reliable, long term service for compatible liquids. The use of an external magnet reduces the possibility of magnetic particle build-up inside the armature tube and subsequent loss of operation as may occur with the internal magnet repulsion design.	Series 1261/1263/1264 Welded Chamber Level Control External Mount, Pressure to 1750 psig (121 bar), and Temperature to 500°F (260°C) High pressure capability in a heavy duty welded carbon steel chamber provides a rugged heavy duty control to operate up to 1750 psi (121 bar) at 100°F (38°C), and 1650 psi (114 bar) at 500°F (260°C) with a minimum specific gravity of 0.60. Electrical enclosures are suited for general purpose NEMA 1, weatherproof NEMA 4X, explosion-proof or explosion-proof – vapor proof NEMA 7, 9 groups B, C, D, E, F, G, Division I and II requirements.