Siemens Pointek CLS300 Rigid Rod Capacitance High Temperature/Pressure Point Level Switch

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Capacitance switch for point level and material detection in liquids, solids, slurries, interfaces, and foam. Standard rod lengths from 9.8" to 40" (0.25 to 1 meter). Rated for higher process temperatures and pressures than the CLS200. NEMA 4/IP65 aluminum electronics enclosure. 1 SPDT Form C relay output and solid state switch output. For process temperatures to 392° F (200°C) and process pressures to 511 PSIG. For media with minimum dielectric constant 1.5.

Territory Restriction: Due to our territory agreement with Siemens, Lesman is the authorized Siemens sales representative in Illinois, Indiana, Wisconsin, Eastern Missouri, Michigan's Upper Peninsula, and the Paducah, KY area. If you are outside that area, you can find your local sales office or get technical assistance by calling 800-365-8766 or 972-522-4500, or sending an email to

Siemens Pointek CLS300 is a capacitance level switch for detection of liquids, solids, slurries, foam and interfaces, in high pressure and temperature applications and works even when there's buildup on the probe. Its robust design makes it the right choice for heavy solids applications with abrasive materials. The fully potted electronics are unaffected by condesation, dust, and vibration.

The Pointek CLS300 standard rod version has three under-the-cover LED indicators with relay and solid-state switch alarms. It is rated for use in process temperatures to 392°F (200°C) and process pressure to 511 PSIG. A high temperature version is available for process temperatures to 752°F (400°C) .

The CLS300 switch responds to any material with a dielectric constant of 1.5 or more, by detecting a change in oscillating frequency. It can be set to detect before contact or on contact with the probe. The CLS300 operates independently of the tank wall or pipe so it does not require an external reference electrode for level detection in a non-conductive vessel such as concrete or plastic.

  • Key applications include liquids, slurries, bulk solids, viscous materials, relatively high pressure and temperature, hazardous areas, milling and mining applications
  • Inverse frequency shift capacitance switch with rod lengths from 9.8" to 40" (0.25 to 1 meter), with optional rod lengths from 9.8" to 39.3" (250 to 999 mm)
  • Good for high/low point level monitoring in vessels with process temperatures to 392° F (200°C)
  • Form C SPDT relay and solid state switch alarm outputs
  • Three LED indicators under the lid for sensor status, output status, and power
  • Power supply: 12 - 250 V AC/DC, max. 2 W
  • Configure using potentiometers for trip point and delay, and dip switches for alarm output modes
  • NEMA4/IP65 epoxy-coated aluminum enclosure with gasket, optional IP68. Optional 316L stainless steel thermal isolator
  • Choice of 3/4" to 1/2" NPT threaded or 1" to 4" ASME flanged process connection
  • Wetted parts: 316L stainless steel, PFA, PEEK isolators, FKM or FFKM O-rings
  • CE, CSA, FM, ATEX approvals available

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Model Selection Guide

Use this table to find the right model for your application. Need a custom rod length? Don't see the option you need? Call a Lesman sales specialist at 800-953-7626.

Make one choice from each table section. A complete catalog number will look like this: 7ML5650- _ _ _ _ _ - _ _ _ _.

Description Catalog
Siemens Pointek CLS300 Capacitance Point Level Detection Switch 7ML5650-
316L SS Process
3/4" NPT Threaded
1" NPT Threaded
1.25" NPT Threaded
1.5" NPT Threaded
1" ASME, 150 Lb Welded Flange
1.5" ASME, 150 Lb Welded Flange
2" ASME, 150 Lb Welded Flange
3" ASME, 150 Lb Welded Flange
4" ASME, 150 Lb Welded Flange
0A_ _ _-
0B_ _ _-
0C_ _ _-
0D_ _ _-
5A_ _ _-
5D_ _ _-
5G_ _ _-
5K_ _ _-
5N_ _ _-
Standard Probe Lengths
(from flange face)
Threaded lengths include  
process connection.
13.78" Standard Rod Length   350mm
19.69" Standard Extended Rod   500mm  
29.53" Standard Extended Rod   750mm  
39.37" Standard Extended Rod   1000mm  
_ _A_ _-
_ _B_ _-
_ _C_ _-
_ _D_ _-
Temperature Options No Thermal Isolator
Thermal Isolator (Process Temps >185° F)
_ _ _0_-
_ _ _1_-
Wetted Seals FKM
FFKM (Process Temps >-4° F)
_ _ _ _0-
_ _ _ _1-
Probe 316L SS, PFA Lining, PEEK Isolators 0_ _ _
Approvals CSA/FM General Service
CSA/FM Dust-Ignition Proof, IS Probe
CSA/FM Explosion Proof, IS Probe
_H_ _
_F_ _
_G_ _
Enclosure IP65 Rating with Two 1/2" NPT Cable Inlets
IP68 Rating with Two 1/2" NPT Cable Inlets
_ _A_
_ _C_
Active Shield Length 125 mm Threaded, 105 mm Flanged
250 mm Threaded, 230 mm Flanged **
400 mm Threaded, 380 mm Flanged **
_ _ _0
_ _ _1
_ _ _2
Spare Parts and
GP, Dust/Ignition-Proof 1/2" HF Cable Gland  
Explosion-Proof 1/2" HF Cable Gland
3/4" NPT Ryton SensGuard (PPS) Cover
**250 mm Extended shield available only on probe lengths > 500 mm.
**400 mm Extended shield available only on probe lengths > 750 mm.

For CLS200 standard compact or extended rod, rod with sanitary process connection, or sliding coupling with threaded process connection or CLS200 digital models, call Lesman.

More Information
Point or Continuous Level Point
Level Media Liquid, Slurry, Interface, Dry Solid
Level Technology Capacitance
Measuring Range 9.8" to 40" (0.25 to 1 Meter)
Wetted Materials 316L stainless steel, PFA, PEEK isolators, FKM or FFKM O-rings
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