Point Level Switches

Capacitance Level Switch Features

• 
  

  Potential-free relay switch output

  
  


• 
  

  Simple, low-cost & highly reliable design

  
  


• 
  

  IP67 weatherproof electronic protection

  
  


• 
  

  Trouble-free operation for conductive & non-conductive liquids, slurries

  
  


• 
  

  Suitable for tanks, vessels & open sumps

  
  

Description

Electronet Series CLS-01 are capacitance-type level switches designed for accurate point-level sensing.
The vessel wall and probe act as two electrodes forming a capacitor. For non-conductive vessels, a coaxial probe is used.
The capacitance varies based on the dielectric constant of the material surrounding the probe—air has a value of 1, while liquids have higher values.
As material level changes, the capacitance changes accordingly, triggering a switching output at the preset point.
This makes CLS-01 ideal for reliable level detection in industrial applications.

Technical Specifications Probe Specifications

• 
  

  Probe Length: As required (Rigid type up to 3000 mm)

  
  


• 
  

  Probe Diameter: 15 mm to 25 mm

  
  


• 
  

  Accuracy: ±5 mm w.r.t. set point

  
  


• 
  

  Repeatability: ±1% of full probe length

  
  


• 
  

  Switch Differential: Fixed ±10 mm

  
  


• 
  

  Probe Type: Single Rod / Coaxial / Flexible

  
  


• 
  

  Process Temperature: Up to 100°C

  
  


• 
  

  Process Pressure: Up to 10 kg/cm²

  
  

Material of Construction

• 
  

  Probe: SS316 / SS316L

  
  


• 
  

  Electrode Insulation: PTFE

  
  


• 
  

  Electronics Enclosure: SS-304

  
  


• 
  

  Seals / Gaskets: EPDM / PEEK

  
  

Electrical

• 
  

  Output: Potential-free relay contact

  
  


• 
  

  Power Supply: 24V DC (±10%)

  
  


• 
  

  Power Consumption: < 6 VA

  
  


• 
  

  Response Time: < 1 second

  
  


• 
  

  Temperature Coefficient: ±0.01% per °C

  
  

Enclosure & Protection

• 
  

  Protection Class: IP65 or higher (IEC-60529)

  
  


• 
  

  Electrical Connection:

  
  
  
  
  • 
    

    M20 × 1.5 cable entry

    
    
  
  
  • 
    

    DIN 43650 connector

    
    
  
  
  
  

Process Connection Options

1. 
   

   1" BSP (M)

   
   


2. 
   

   1½" BSP (M)

   
   


3. 
   

   2" PVC Flanged

   
   


4. 
   

   2" SS316 Flanged

   
   


5. 
   

   50 NB SS316 Tri-Clover

   
   


6. 
   

   M27 × 1.5 (M)

   
   


7. 
   

   Other options on request

   
   

Mounting

• 
  

  Tank mounting

  
  


• 
  

  Open sump mounting

  
  

Ambient Conditions

• 
  

  Temperature: 0 to 75°C

  
  


• 
  

  Humidity: 0 to 98% non-condensing @ 35°C

  
  

Features

• 
  

  Site adjustable up to 4 switching points

  
  


• 
  

  Wide choice of materials: SS304 / SS316 / SS316L, PP, or PVDF

  
  


• 
  

  Safe and reliable switching through magnetic coupling

  
  


• 
  

  Robust, shock-proof design ensures stable performance

  
  


• 
  

  Wide differential switch design

  
  


• 
  

  Radiation and seismically qualified

  
  

Description

A single or two split displacers are suspended from a wire rope connected to a coupler rod.
The rod carries an actuator that moves inside a non-magnetic barrier tube through a compression spring.

When the displacer is not immersed in liquid, the spring remains in a compressed state due to the weight of the displacer. As the liquid level rises, the displacer becomes immersed and undergoes a weight reduction (Archimedes Principle). This causes an upward motion of the coupler rod, allowing the spring to return to its normal position.

• 
  

  Narrow Differential (ND): Achieved using one standard displacer (fixed differential).

  
  


• 
  

  Wide Differential (WD): Achieved using two split displacers, and can be adjusted by varying the distance between them.

  
  

Technical Specifications Level Switch Type

• 
  

  Displacer Type, Top Mounted

  
  

Range

• 
  

  1000 mm to 10,000 mm

  
  

Number of Switch Points

1. 
   

   Single Point

   
   


2. 
   

   Two Point

   
   


3. 
   

   Three Point

   
   


4. 
   

   Four Point

   
   

Type of Switch

1. 
   

   Micro Switch

   
   


2. 
   

   Hermetically Sealed Reed Switch

   
   

Switch Actuation Type

1. 
   

   Falling Level

   
   


2. 
   

   Rising Level

   
   

Switch Contact Type

1. 
   

   Normally Closed (NC)

   
   


2. 
   

   Normally Open (NO)

   
   


3. 
   

   Latch Type

   
   

Switch Configurations

1. 
   

   SPDT

   
   


2. 
   

   DPDT

   
   

Switch Ratings

• 
  

  Contact Rating: 1 Amp, 24 V DC (Inductive)

  
  


• 
  

  Accuracy at Set Point: ≤ ±5 mm

  
  


• 
  

  Repeatability: ≤ ±2 mm

  
  


• 
  

  Contact Resistance: < 100 mΩ

  
  


• 
  

  Response Time: < 2 seconds

  
  


• 
  

  Contact Life: Better than 10⁶ operations

  
  

Switch Housing Material

1. 
   

   Die-cast Aluminium

   
   


2. 
   

   Stainless Steel

   
   

Ingress Protection

• 
  

  IP-65

  
  

Displacer Type

1. 
   

   Single

   
   


2. 
   

   Split

   
   

Displacer Material

1. 
   

   SS-304

   
   


2. 
   

   SS-316

   
   


3. 
   

   SS-304L

   
   


4. 
   

   SS-316L

   
   


5. 
   

   Other on request

   
   

Rope Material

1. 
   

   SS-304

   
   


2. 
   

   SS-316

   
   


3. 
   

   SS-304L

   
   


4. 
   

   SS-316L

   
   


5. 
   

   Other on request

   
   

Spring Material

1. 
   

   SS-304

   
   


2. 
   

   SS-316

   
   


3. 
   

   Inconel

   
   


4. 
   

   Other on request

   
   

Process Connection

• 
  

  Flanged

  
  

Maximum Operating Pressure

• 
  

  10 kg/cm² (g)

  
  

Accessories (Optional)

1. 
   

   Perforated Type Stilling Well

   
   


2. 
   

   External Chamber

   
   

Accessory Material

1. 
   

   MS

   
   


2. 
   

   SS-304

   
   


3. 
   

   SS-316

   
   


4. 
   

   Other on request

   
   

Features

• 
  

  Switch output with potential-free relay contact

  
  


• 
  

  Simple, low-cost & reliable operation

  
  


• 
  

  Electronics protection class: Weatherproof IP67

  
  


• 
  

  Trouble-free operation for conductive / non-conductive liquids and slurries

  
  

Electronet series LCS-02 are conductivity-type level switches used for level measurement of conductive liquids.
The probe works on the principle of variation in electrical resistance between the reference electrode and the level control electrode.

When the medium covers the electrodes, the change in resistance is detected as a level signal.

• 
  

  If the tank wall is electrically conductive, it can serve as the reference electrode.

  
  


• 
  

  For tanks made of plastic, concrete, or other non-conductive materials, an additional reference electrode is required.

  
  

Technical Specifications Type

1. 
   

   Single Point Conductivity Type Level Switch

   
   


2. 
   

   Two Point Conductivity Type Level Switch

   
   


3. 
   

   Three Point Conductivity Type Level Switch

   
   


4. 
   

   Four Point Conductivity Type Level Switch

   
   

Probe Length

• 
  

  As per requirement (Rigid type, max 3000 mm)

  
  

Probe Diameter

• 
  

  15 mm to 25 mm

  
  

Process Temperature

• 
  

  Up to 120°C (max)

  
  

Process Pressure

• 
  

  Up to 10 kg/cm² (max)

  
  

Probe Material (MOC)

• 
  

  SS316 / SS316L

  
  

Type of Sensing Electrode

• 
  

  Rigid Type

  
  


• 
  

  Flexible Type

  
  

Electrode Insulation Material

• 
  

  PTFE

  
  

Electronics Enclosure (MOC)

1. 
   

   Die-cast Aluminium

   
   


2. 
   

   SS304

   
   

Seals / Gaskets

• 
  

  EPDM / PEEK

  
  

Electrical Connection

• 
  

  DIN 43650 Connector

  
  

Type of Output

• 
  

  Resistance Value

  
  

Accuracy

• 
  

  ±5 mm with respect to set point

  
  

Repeatability

• 
  

  ±1 mm with respect to set point

  
  

Response Time

• 
  

  < 1 second

  
  

Switch Differential

• 
  

  Fixed ±10 mm

  
  

Probe Type

1. 
   

   Single Rod

   
   


2. 
   

   Coaxial

   
   

Enclosure Protection Class

1. 
   

   SS Enclosure: IP65 or higher (as per IEC-60529)

   
   


2. 
   

   Die-cast Aluminium Enclosure: Weatherproof IP67

   
   

Process Connection

1. 
   

   ½" BSP(M)

   
   


2. 
   

   1¼" BSP(M)

   
   


3. 
   

   2" PVC Flanged

   
   


4. 
   

   2" SS316 Flanged

   
   


5. 
   

   M20 x 1.5 (M)

   
   


6. 
   

   M39 x 3 (M)

   
   

Mounting

• 
  

  Tank Mounted

  
  


• 
  

  Mounted over open sumps

  
  

Ambient Conditions

• 
  

  Temperature: 0 to 75°C

  
  


• 
  

  Humidity: 0 to 98% non-condensing at 35°C

  
  

• 
  

  Simple, low-cost, and reliable operation

  
  


• 
  

  Trouble-free performance with conductive / non-conductive liquids and slurries

  
  


• 
  

  Switch output with potential-free relay contact

  
  


• 
  

  Electronics protection class: Weatherproof IP67, Flameproof (CMRI IIA/IIB Certified)

  
  

Electronet series LMS-01 are magnetic float-operated level switches designed for reliable level monitoring.
The sensing assembly consists of a float and a non-magnetic guide tube that ensures undisturbed magnetic flux.

Inside the float, a magnetic system moves with the liquid level along the guide tube.
The guide tube contains hermetically sealed, glass-encapsulated reed switches. As the float moves, the magnet actuates these reed switches, providing switching output at the desired preset level.

• 
  

  100 mm to 2000 mm

  
  

• 
  

  ID: 21 mm

  
  


• 
  

  OD: 25 mm

  
  

• 
  

  ±2% F.S.

  
  

• 
  

  Up to 100°C max

  
  

• 
  

  Up to 10 kg/cm² max

  
  

1. 
   

   SS316

   
   


2. 
   

   PTFE

   
   


3. 
   

   Hastelloy C

   
   


4. 
   

   PP

   
   

• 
  

  1 No. potential-free relay contact

  
  


• 
  

  Contact form: 1 C/O (SPDT), 1 Amp

  
  

• 
  

  24 V DC (±10%)

  
  

• 
  

  Relay – Potential Free Contact (1 NO + 1 NC)

  
  

• 
  

  < 6 VA

  
  

• 
  

  < 1000 ms

  
  

• 
  

  ±0.01% per °C

  
  

• 
  

  Weatherproof IP67

  
  


• 
  

  Flameproof CMRI IIA/IIB Certified

  
  

• 
  

  1¼" BSP (M) Threaded

  
  


• 
  

  2" BSP (M) Threaded

  
  


• 
  

  2" SS316 Flanged

  
  

• 
  

  Top of the tank

  
  

• 
  

  Temperature: 0 to 75°C

  
  


• 
  

  Humidity: 5% to 95% non-condensing at 25°C

  
  

RFLS-01 – RF Admittance Type Level Switch

(Frequency Sweep Technology | Liquid & Powder Level Detection)

Features

• 
  

  Frequency sweep technology for accurate material type detection

  
  


• 
  

  Compact design with two independent switch outputs

  
  


• 
  

  Suitable for media distinction (liquids & powders)

  
  


• 
  

  Liquid fork simulation — no calibration required

  
  


• 
  

  Wide process temperature range: –40°C to 125°C

  
  


• 
  

  Suitable for materials with dielectric constant εr > 1.5

  
  


• 
  

  Multi-color LED switch indication

  
  


• 
  

  Maintenance-free operation

  
  


• 
  

  PNP output type

  
  

Description

Electronet Series RFLS-01 is designed for reliable detection of industrial liquids and powders using advanced Frequency Sweep Technology.
By analyzing the resonant electrical capacitance created by media dielectric properties and conductivity, the RFLS-01 learns and recognizes the material signature.
This allows superior performance compared to traditional level detection methods for both fluids and bulk solids.

Technical Specifications Electrical / Functional

• 
  

  Radiated Signal: 50–300 MHz

  
  


• 
  

  Power Supply: 18 to 36 V DC

  
  


• 
  

  Output Type: PNP

  
  


• 
  

  Output Ratings: Max. 50 mA & 100 mA (configurable), short-circuit & high-temperature protected

  
  


• 
  

  Output Polarity: NO / NC selectable

  
  


• 
  

  Off Leak Current: ≤ 20 µA

  
  


• 
  

  Reverse Polarity Protection: Yes

  
  


• 
  

  Reaction Time: 0.1 sec (100 ms)

  
  


• 
  

  Repeatability: ±1 mm

  
  

Mechanical

• 
  

  Process Connections:

  
  
  
  
  • 
    

    1" NPT, 1¼" NPT, 1½" NPT, 2" NPT

    
    
  
  
  • 
    

    1" BSP, 1¼" BSP, 1½" BSP, 2" BSP

    
    
  
  
  
  


• 
  

  Process Temperature: –40°C to 125°C

  
  


• 
  

  Media Pressure: Max. 100 Bar

  
  


• 
  

  Installation: Any orientation

  
  


• 
  

  Cable: 5 to 10 meters, 4-wire + shield

  
  

Protection & Certification

• 
  

  Protection Class: IP-66 / IP-68 (as per IS-13947)

  
  


• 
  

  Certification: CE

  
  

ULS-200S – Ultrasonic Contact Type Level Switch

(Contact Ultrasonic Level Detection for Liquids & Oils)

Description

Electronet Series ULS-200S is a contact-type ultrasonic level switch designed to detect the presence or absence of liquid when in direct contact with the sensor.
The sensor sends a current signal to the converter, which then generates a potential-free relay output. The output can be configured by the user to indicate either liquid presence or absence.

ULS-200S is suitable for a wide range of liquids and oils and provides fast, accurate, and maintenance-free operation.

  Technical Specifications Primary Sensor

• Type: Ultrasonic Contact Type

• Actuation Length / Switching Level: As per requirement

• Output Signal:

  • 8 mA (Normal Condition)

  • 16 mA (Alarm Condition)

• Actuation Time: < 0.5 sec

• Power Supply: 24 V DC

• Switching Accuracy: ±2 mm

• Probe Material (MOC): SS-316L

• Enclosure Protection: IP-65 (as per IEC-60529)

• Mounting Accessories: Provided

  Secondary Converter

• Indications:

  • LED indication for switch health / failure

  • Power ON / OFF status

• Contact Output: 2 × SPDT Relay Outputs

• Contact Ratings:

  • 220 V / 5A

  • 24 V / 1A

• Power Supply: 220 V AC, 50 Hz

• Power Consumption: < 15 VA

• Insulation Resistance: > 100 MΩ (power supply terminals)

• Housing Material: SS-316

• Enclosure Protection: IP-65 (as per IEC-60529)

• Gasket: EPDM / Neoprene / other materials suitable for environmental conditions