Flowline Level Switches

• Adjustable multi-point fitting for up to six level switch points 
• Multi-switch installation is made fast, simple and cost effective 
• Track sections are offered in two, four, six or eight foot lengths 
• Switch cars may be easily adjusted to any depth along track 
• Fully compatible with Flowline level switches and relay controllers 
• Constructed of rugged PP for corrosive liquid environments 
• Entire Smart Trak and switch assembly installs through 2" NPT fitting 
• Standard track sections may be easily cut to custom lengths as required 
• NEMA 4X junction box provides both power and signal termination 
• Side mounting bracket may be used for side wall installation

• Ideal single-point installation fitting for high or low level switch 
• Single-switch installation 
• Switch Pak™ fitting is specified in custom lengths from 4" to 8' 
• Compatible with Flowline level switches and relay controllers 
• Constructed of PP or PVDF materials for corrosive environments 
• Entire level switch assembly installs through 2" NPT fitting 
• NEMA 4X junction box provides power and signal termination 
• Optional mounting bracket may be used for side wall installation

Offered in FM and CSA approved explosion proof or general purpose configurations, this switch package provides up to four level switch points with a dry contact closure interface for remote devices such as a PLC or SCADA. The product is typically selected for high temperature and/or pressure process vessel applications located within a classified hazardous or general purpose area. Media examples include nickel acid or acetone. Specify the appropriate assembly dimensions.

• Length:  4" to 72" (10 cm to 1.8m) 
• Switch points:  1 to 4 (set by factory) 
• Accuracy:  ± 3 mm in water 
• Repeatability:  ± 1 mm in water 
• Specific gravity:  0.75 minimum 
• Orientation:  ± 30* vertical 
• Contact type:  (1-4) SPDT reed 
• Contact rating:  240 VAC/VDC @ 20 VA (CE: 30 Vrms and 42.2 Vpeak or 60 VDC 
• Process temp.: 
• F: -40° to 300°
• C:  -40° to 148.9° 
• Pressure:  750 psi max. (51.7 bar max.) 
• Guide/float mat.:  316 ss 
• Process mount:  2" NPT 
• Enclosure rating: S443: 
• S453:  NEMA 4X (IP65)
• NEMA 7 (IP65) 
• Installed height: 
• S443: 5.2" (13.2 cm)
• S453:  6.2" (15.7 cm) 
• Encl. material: 
• S443: PP, UL94VO
• S453:  Aluminum 
• Conduit entrance:  Single, 1/2" NPT 
• Wire type:  3-12 wire, #18 AWG 
• Termination:  3-12 poles 
• Classification: 
• S443: General purpose
• S453:  Explosion proof 
• Approvals: 
• S443: None
• S453:  FM, CSA: Class I, Division I, Groups B, C & D; Class II, Groups E, F and G 
• CE compliance:  EN 50082-2 immunity   EN 55011 emission   EN 61010-1 safety 

The ultrasonic level switch is an excellent choice for a broad range of liquids including those with light coating or scaling type characteristics. Liquid examples include xylene, chromic acid and light cooking oil. The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. For maximum flexibility, the sensor is offered in general purpose and intrinsically safe versions with two probe lengths and PP or PFA Teflon materials.

Ordering Info

• Accuracy:  ±1 mm in water 
• Repeatability:  ± 0.5 mm in water 
• Frequency:  1.5 MHz. 
• Supply voltage:  12 - 36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 5mA, ± 1mA (dry) 19 mA, ± 1mA (wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC max. @ 100 mA max. 
• Switch output:  Selectable NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  150 psi (10 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Sensor material:  Polypropylene (PP) or Perfluoroalkoxy (PFA) 
• Sensor rating:  NEMA 6 (IP68) 
• Mounting threads:  Short: 3/4" NPT (3/4" BSP) 
• Long: 3/4" NPT (3/4" G) 
• Mounting gasket:  Viton (3/4"), metric only 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with shield & PP or PFA jacket 
• CSA approval:  Class I, Groups A, B, C & D;    Class II, Groups E, F & F; Class III 
• CSA entity parameters:  Vmax = 32 VDC    Imax = 0.5 A    Ci = 0 µF    Li = 0 mH 
• Certificate number:  LR 79326-4 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission 

The tuning fork level switch is an excellent choice for more challenging application liquids including those with light to medium coating or scaling type characteristics.  Liquid examples include light sodium hydroxide, brine and copper sulfate solutions.  The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  The general purpose sensor features a PP submersible probe and cable, and is designed for installation through the wall or inside the tank..

• Accuracy:  ± 1 mm in water 
• Repeatability:  ± .5 mm in water 
• Frequency:  400 Hz (dry) 
• Supply voltage:  12-36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 8 mA (dry) 19 mA (wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC @ 100 mA 
• Switch output:  Selectable NO or NC states 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  150 psi (10 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Sensor material:  PP/Ryton® (40% glass) 
• Sensor rating:  NEMA 6 / IP68 
• Mounting threads:  3/4" NPT (3/4" G) 
• Mounting gasket:  Viton (3/4") metric only 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with ground, shield & PP jacket 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission 

The non-intrusive capacitance level switch mounts on the exterior wall of non-metallic tanks and is an excellent choice for clean, conductive, non-coating or scaling type liquids.  Media examples include deionized water, nitric and hydrofluoric acids.  The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  Offered in general purpose and intrinsically safe versions, the non-intrusive sensor detects liquid through the wall of any plastic or fiberglass tank. 

• Accuracy:  ±1 mm in water 
• Repeatability:  ± 0.5 mm in water 
• Dielectric range:  > 10 constants 
• Conductive range:  > 100 micromhos 
• Supply voltage:  12 - 36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 5mA (dry) 19 mA (wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC @ 100 mA 
• Switch output:  Selectable NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Tank Compatibility:  Non-metallic 
• Tank wall thickness: Up to 1" (25 mm) max. 
• Enclosure material:  Polysulfone (PSO) 
• Enclosure rating:  NEMA 4X (IP 65) 
• Bracket material:  Standard: PE    Option: PP 
• Bracket mounting:  3M adhesive or thermal weld 
• Conduit connection:  1/2" NPT 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET),  22 gauge with ground, shield & PP jacket 
• CSA approval:  Class I, Groups A, B, C & D 
• CSA entity parameters:  Vmax = 32 VDC    Imax = 0.5 A    Ci = 0 µF    Li = 0 mH 
• CSA certificate:  LR 79326-4 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission

The SuperGuard capacitance level switch is an excellent choice for a wide range of conductive liquids including those with light to medium coating or scaling type characteristics.  Liquid examples include soap solutions, printing ink and wastewater.  The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  The general purpose sensor features a PP submersible probe and cable, and is designed for installation through the wall or inside the tank. 

• Accuracy:  ±1 mm in water 
• Repeatability:  ± 0.5 mm in water 
• Dielectric range:  > 20 constants 
• Conductive range:  > 100 micromhos 
• Supply voltage:  12 - 36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 5mA (Dry) 19 mA (Wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC @ 100 mA 
• Switch output:  Selectable NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  150 psi (10 bar) @ 25 degrees C, derated @ 1.667 psi (0.113 bar) per degree C above 25 degrees C. 
• Probe material:  Polypropylene (PP) 
• Probe rating:  NEMA 6 (IP68) 
• Mounting threads:  3/4" NPT (3/4" G) 
• Mounting gasket:  3/4" Viton (metric only) 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with ground, shield and PP jacket 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission 
• Certificate number:  LR 79326-4 

The intrusive capacitance level switch is an excellent choice for a broad range of relatively clean, conductive, non-coating or scaling type liquids.  Media examples include process water, sulfuric acid and hydrogen peroxide solutions.  The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  For maximum flexibility, the sensor is offered in general purpose and intrinsically safe versions with two probe lengths and PP or PFA Teflon materials. 

• Accuracy:  ±1 mm in water 
• Repeatability:  ± 0.5 mm in water 
• Dielectric range:  > 20 constants 
• Conductive range:  > 100 micromhos 
• Supply voltage:  12 - 36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 5mA, ± 1mA (dry) 19 mA, ± 1mA (wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC max. @ 100 mA max. 
• Switch output:  Selectable NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  150 psi (10 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Sensor material:  Polypropylene (PP) or Perfluoroalkoxy (PFA) 
• Sensor rating:  NEMA 6 (IP68) 
• Mounting threads:  Short: 3/4" NPT (3/4" BSP) 
• Long: 3/4" NPT (3/4" G) 
• Mounting gasket:  Viton (3/4"), metric only 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with shield & PP or PFA jacket 
• CSA approval:  Class I, Groups A, B, C & D;  Class II, Groups E, F & F; Class III 
• CSA entity parameters:  Vmax = 32 VDC   Imax = 0.5 A    Ci = 0 µF     Li = 0 mH 
• Certificate number:  LR 79326-4 
• CE compliance:  EN 50082-2 immunity   EN 55011 emission 

The optic switch is an excellent choice for leak detection applications in and around the secondary containment vessel of sumps, tanks and pipes. The sensor can be applied in a broad range of liquids including sulfuric acid, jet fuel and deionized water. The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. For maximum flexibility, the sensor is offered in general purpose and intrinsically safe versions with two probe lengths and PP or PFA Teflon materials. 

• Accuracy:  ±1 mm in water 
• Repeatability:  ± 0.5 mm in water 
• Supply voltage:  12 - 36 VDC 
• Consumption:  Relay: 25 mA 
• FET: 5mA (dry) 19 mA (wet) 
• Relay rating:  60 VDC/VAC @ 1A 
• FET rating:  36 VDC @ 100 mA 
• Switch output:  Selectable NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  150 psi (10 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Sensor material:  Polypropylene (PP) or Perfluoroalkoxy (PFA) 
• Sensor rating:  NEMA 6 (IP68) 
• Mounting threads:  Short: 3/4" NPT (3/4" BSP)  Long: 3/4" NPT (3/4" G) 
• Mounting gasket:  Viton (3/4"), metric only 
• Cable type:  8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with shield & PP or PFA jacket 
• CSA approval:  Class I, Groups A, B, C & D;  Class II, Groups E, F & F;  Class III 
• CSA entity parameters:  Vmax = 32 VDC    Imax = 0.5 A    Ci = 0 µF 

The vertical float level switch is an excellent choice for small tank applications with clean, non-coating or scaling type liquids.  Media examples include process water, chemical and acid solutions.  The reed output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  The general purpose sensor features a PP or PVDF submersible probe and cable, and is designed for vertical installation inside the tank. 

• Accuracy:  ± 2 mm in water 
• Repeatability:  ± 1 mm in water 
• Extreme orientation:  ± 20 degrees from vertical 
• Specific gravity:  0.8 minimum 
• Switch type:  Dry contact, SPDT or Dry contact, SPST 
• Switch voltage:  120 VAC, 120 VDC @ 15 VA or 120 VAC, 120 VDC @ 50 VA 
• CE rating:  30 Vrms and 42.4 Vpeak or 60 VDC @15 VA 
• Switch output:  Selectable NO or NC states 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  25 psi (2 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Probe material:  Polypropylene (PP) 
• Polyvinylidene Fluoride (PVDF) 
• Probe rating:  NEMA 6 / IP68 
• Mounting threads:  3/4" NPT (3/4" BSP) 
• Cable type:  8 ft. (2.5 m), 3-wire, 22 gauge with ground, shield & PP or PFA jacket 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission 

 

The vertical buoyancy level switch is an excellent choice for a broad range of relatively clean, non-coating or scaling type liquids. Media examples include acetic acid, process water and organic solvent solutions. The reed output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  The general purpose sensor features a PP submersible probe and cable, and is designed for vertical installation inside the tank.

• Accuracy:  ± 2 mm in water 
• Repeatability:  ± 1 mm in water 
• Extreme orientation:  ± 20 degrees from vertical 
• Specific gravity:  0.8 minimum 
• Switch type:  Dry contact, SPDT or Dry contact, SPST 
• Switch voltage:  120 VAC, 120 VDC @ 15 VA or 120 VAC, 120 VDC @ 50 VA 
• CE rating:  30 Vrms and 42.4 Vpeak or 60 VDC @15 VA 
• Switch output:  Selectable NO or NC states 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  25 psi (2 bar) @ 25 degrees C., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Probe material:  Polypropylene (PP) 
• Polyvinylidene Fluoride (PVDF) 
• Probe rating:  NEMA 6 / IP68 
• Mounting threads:  3/4" NPT (3/4" BSP) 
• Cable type:  8 ft. (2.5 m), 3-wire, 22 gauge with ground, shield & PP or PFA jacket 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission

The horizontal buoyancy level switch mounts through the tank’s side wall and is an excellent choice for a broad range of clean, non-coating or scaling type liquids.  Media examples include sulfuric acid, process water and pure liquid solutions.  The reed output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm.  The general purpose sensor features a PP submersible probe and cable, and is designed for fast installation.

• Accuracy:  ± 2 mm in water 
• Repeatability:  ± 1 mm in water 
• Extreme orientation:  ± 20 degrees from horizontal 
• Specific gravity:  0.8 minimum 
• Switch type:  Dry contact, SPDT 
• Switch voltage:  Standard: 120 VAC, 120 VDC @ 15 VA 
• CE mark:  30 Vrms and 42.4 Vpeak or 60 VDC 
• Switch output:  Selectable NO or NC states 
• Temperature range:  F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure range:  25 psi (2 bar) @ 25 degreesC., derated @ 1.667 psi (0.113 bar) per degree C. above 25 degrees C. 
• Probe material:  Polypropylene (PP) 
• Probe rating:  NEMA 6 (IP68) 
• Mounting threads:  3/4" NPT (3/4" G) 
• Mounting gasket:  Viton (3/4") metric only 
• Cable type:  8 ft. (2.5 m), 3-wire, 22 gauge with ground, shield & PP jacket 
• CE compliance:  EN 50082-2 immunity 

EN 55011 emission 

The mini-float level switches are a good choice for simple, non-critical applications with clean, non-coating or scaling type liquids. Media examples include water with light chemical and acid solutions. The reed output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. The general purpose sensors come complete with a two foot cable and are designed for simple installation.

• Accuracy:  ± 5 mm in water 
• Repeatability:  ± 2 mm in water 
• Extreme orientation:  ± 20 degrees from horizontal 
• Specific gravity:  0.8 minimum 
• Reed type:  Dry contact SPST 
• Reed voltage:  120 VAC, 120 VDC @ 20 VA 
• (CE: 30 Vrms and 42.2 V peak or 60 Vdc) 
• Reed output:  Selectable NO or NC 
• Temperature rating: F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Pressure rating:  25 psi (2 bar) @ 25 degrees C, 
• derated @ 1.667 (0.113 bar) psi per degree C above 25 degrees C. 
• Probe material:  Polypropylene (PP) 
• Mounting threads:  1/2" NPT 
• Cable length : 2 ft. (61 cm), 2-wire, 22 AWG 
• CE Compliance:  EN 50082-2 immunity 

EN 55011 emission

The mini-float level switches are a good choice for simple, non-critical applications with clean, non-coating or scaling type liquids. Media examples include water with light chemical and acid solutions. The reed output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. The general purpose sensors come complete with a two foot cable and are designed for simple installation.

• Accuracy:  ± 5 mm in water 
• Repeatability:  ± 2 mm in water 
• Extreme orientation:  ±20 degrees from vertical 
• Specific Gravity Range:  0.8 - 1.2 
• Reed type:  Dry contact, SPST 
• Reed rating:  120 VAC, 120 VDC @ 50 VA  (CE: 30 Vrms and 42.2 Vpeak or 60 Vdc) 
• Reed output:  NO or NC 
• Temperature range: 
• F: -40 degrees to 194 degrees 
• C: -40 degrees to 90 degrees 
• Sensor material:  Polypropylene (PP) or Polyvinylidene Fluoride (PVDF) 
• Mounting threads:  1/8" NPT (1/8" BSP) 
• Cable type:  2 ft. (61 cm), 2-wire 
• CE compliance:  EN 50082-2 immunity  EN 55011 emission 

 

The general purpose high-temp float level switch is an ideal choice for relatively clean water, diluted chemical or petroleum based liquids with non-coating and/or scaling characteristics. Media examples include hot machine oil and pickling solutions. The dry contact closure provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. The sensor mounts horizontally through the side wall of the tank.

• Orientation: ± 20° vertical 
• Accuracy: ± 3 mm in water 
• Repeatability: ± 1 mm in water 
• Specific gravity: 0.8 min. 
• Contact type: (1) SPST reed 
• Contact rating: 240 VAC/VDC @ 20 VA (CE: 30 Vrms and 42.2 Vpeak or 60 VDC) 
• Contact output: Selectable NO/NC 
• Process temp.: F: 
• C:  -40° to 300°
• -40° to 148.9° 
• Pressure: 300 psi max. (20.7 bar max.) 
• Sensor rating: NEMA 4 (IP65) 
• Sensor material: 316 ss 
• Process mount: 1/2" NPT 
• Wire type: 2-wire, #22 AWG 
• Wire length: 24" (61 cm) 
• Wire jacket mat.: Polymeric 
• Classification: General purpose 
• CE compliance: EN 50082-2 immunity

EN 55011 emission
EN 61010-1 safety 

The general purpose high-temp float level switch is an ideal choice for relatively clean water, diluted chemical or petroleum based liquids with non-coating and/or scaling characteristics. Media examples include hot deionized water and cooking oil. The dry contact closure provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. The sensor mounts vertically inside the tank on the end of a sealed pipe apparatus. 
 
 
 
 
 
 
 
 
 

• Orientation:  ± 20° vertical 
• Accuracy:  ± 3 mm in water 
• Repeatability:  ± 1 mm in water 
• Specific gravity: 
• LV30: 0.7 min.
• LV31: 0.9 min.
• LV32:  0.8 min. 
• Contact type:  (1) SPST reed 
• Contact rating:  240 VAC/VDC @ 20 VA (CE: 30 Vrms and 42.2 Vpeak or 60 VDC) 
• Contact output:  Selectable NO/NC 
• Process temp.: 
• F: -40° to 300°
• C:  -40° to 148.9° 
• Pressure: 
• LV30: 100 psi max. (6.9 bar max.)
• LV31: 275 psi max. (18.9 bar max.)
• LV32:  750 psi max. (51.7 bar max.)
• Sensor rating:  NEMA 6 (IP68) 
• Sensor material:  316 ss 
• Process mount: 
• LV30: 1/8" NPT
• LV31: 1/8" NPT
• LV32:  1/4" NPT 
• Wire type: 
• LV30: 2-wire, #22 AWG
• LV31: 2-wire, #22 AWG
• LV32:  2-wire, #18 AWG 
• Wire length:  24" (61 cm) 
• Wire jacket mat.:  Polymeric 
• Classification:  General purpose 
• CE compliance:  EN 50082-2 immunity   EN55011 emission   EN 61010-1 safety