The Shridhan CLS Series comprises Conductive Type Level Switches designed for point level detection of conductive liquids.
The system uses a common/reference electrode and one or more control electrodes to detect preset liquid levels and operate a relay through a low AC sensing voltage.
Suitable for conductive liquids with low density, high viscosity, solid particles and liquid-liquid interface applications, with solid or suspended probe options.
✅ Genuine Shridhan product with manufacturer warranty
✅ ProSens Automation — Coimbatore, Erode & Salem
The Shridhan CLS Series Conductive Type Level Switch is a point level controller designed for detection and control of conductive liquids.
The system consists of a probe connected to a level controller. The probe incorporates one common/reference electrode and one or multiple control electrodes depending on the number of liquid levels to be controlled.
The control electrode lengths correspond to the required preset level points. When conductive liquid reaches an electrode, the electrical circuit is completed and the resulting signal is amplified to actuate a relay. The relay provides potential-free contacts for subsequent operations.
The CLS Series is available with solid probes up to 4 metres or suspended probes up to 10 metres, with SS304 or SS316 electrodes and PVC or PTFE insulation options.
The manufacturer's brochure specifies these construction and configuration features for the CLS Series. :contentReference[oaicite:1]{index=1}
The CLS works by using the electrical conductivity of the liquid to detect whether the liquid has reached a preset level.
| Component | Function |
|---|---|
| Common / Reference Electrode | Provides the common electrical reference for level sensing. |
| Control Electrodes | Each electrode corresponds to a preset liquid level. |
| Level Controller | Provides sensing electronics, power supply and signal conditioning. |
| Relay | Actuates when the liquid reaches the preset level and provides potential-free contacts. |
The controller applies a low AC voltage across the mass/reference and control electrodes. When conductive liquid reaches a preset electrode, the circuit is completed and the controller actuates the relay. When the liquid level falls and the circuit breaks, the relay is deactivated.
If the tank itself is conductive, it can be used as the reference/common electrode. :contentReference[oaicite:2]{index=2}
| Parameter | Specification |
|---|---|
| Enclosure | Cast Aluminium, Weather Proof IP65 |
| Conduit Connection | Weather Proof Brass ¾" ET (S.C.); ¾" ET / ½" NPT (D.C.) |
| Process Connection | ANSI, BS, DIN Standard Flanges |
| Process Connection Material | MS, SS304 or SS316 |
| Probe Type | Solid up to 4 metres; Suspended up to 10 metres |
| Electrode Material | SS304 or SS316 |
| Electrode Insulation | PVC up to 70°C; PTFE up to 200°C |
| Mass Electrode | One |
| Control Electrodes | One to Four |
| Signal Voltage | 6 V AC, 20 mA |
| Resistance | 40K maximum between reference/common electrode |
| Minimum Conductivity | 25 μS |
| Maximum Temperature | 70°C with PVC insulation; 200°C with PTFE insulation |
| Maximum Test Pressure | 20 kg/cm² at ambient temperature |
The above values are taken from the CLS general specifications table on page 3 of the brochure. :contentReference[oaicite:3]{index=3}
| Probe Type | Maximum Length | Typical Use |
|---|---|---|
| Solid Probe | Up to 4 metres | Direct probe installation for defined level points |
| Suspended Probe | Up to 10 metres | Longer level sensing arrangements |
The brochure visually shows both solid and suspended probe constructions on page 3 and specifies their respective maximum lengths. :contentReference[oaicite:4]{index=4}
The brochure provides the ordering structure CLS 1 2 3 4 5. The configuration is selected by specifying the enclosure, process connection, electrode material and insulation, number of electrodes and level-controller requirement.
| Position | Configuration | Options |
|---|---|---|
| 1 | Enclosure | Cast Aluminium Weather Proof IP65 × ¾" ET; Cast Aluminium Ex-proof Gr. IIA & IIB; PP Enclosure; Teflon; Others |
| 2 | Process Connection | 2" 150# ANSI Flange; 2½" 150# ANSI Flange; 3" 150# ANSI Flange; Others |
| 3 | Electrode MOC × Insulation | SS304 × PVC; SS316 × PVC; SS316L × PTFE; Others |
| 4 | Number of Electrodes | One (1 Level); Two (1 Level); Three (2 Levels); Four (3 Levels); Others |
| 5 | Level Controller | Required; Not required* |
* The brochure states that the factory should be contacted when ordering without a controller. :contentReference[oaicite:5]{index=5}
The standard CLS arrangement can be installed through the tank/vessel using the selected process connection and probe assembly. The brochure also provides an external-chamber arrangement for applications where direct installation on the vessel is not possible or desirable.
| Installation | Description |
|---|---|
| Direct Vessel Installation | Conductive probes installed directly on the vessel at the required level points. |
| External Chamber | Conductive level switch installed in an external chamber connected to the process vessel. |
Where direct installation is not possible or desirable, the CLS can be mounted in an external chamber.
The chamber arrangement provides smooth level control irrespective of turbulence in the process vessel and helps prevent accidental damage to the switch during vessel shutdown or maintenance.
The brochure identifies chamber applications including process isolation, high-pressure/high-temperature applications, corrosive applications and onshore/offshore installations.
| Chamber Feature | Description |
|---|---|
| Level Measurement | Used for liquid level measurement. |
| Interface Measurement | Measurement of the interface between two liquids. |
| Pressure Range | Available for low-pressure and high-pressure applications. |
| Materials | Wide range of materials of construction. |
| End Connections | Wide range of end connection types and sizes. |
| Mounting | Various chamber mounting arrangements to suit existing nozzles. |
| Conductivity | Auto Sensitive — self-adjusts to liquid conductivities above 25 μS. |
These chamber features and applications are specified on page 5 of the brochure. :contentReference[oaicite:6]{index=6}
| Application Type | Suitable Condition |
|---|---|
| Conductive Liquids | Point level detection where the liquid conductivity is at least 25 μS. |
| Low-Density Liquids | The brochure specifically identifies low-density conductive liquids. |
| High-Viscosity Liquids | Suitable for conductive liquids with high viscosity. |
| Liquids with Solid Particles | Suitable where conductive liquids contain solid particles. |
| Liquid Interface | Can be used for interface detection between non-conductive and conductive liquids. |
| High / Low Level Control | Multiple control electrodes can provide multiple preset level points. |
The exact supplied configuration depends on the selected ordering code. The brochure does not provide a separate standard packing-list, so individual accessories and controller arrangements should be confirmed when ordering.
The Shridhan CLS Series is available through ProSens Automation for conductive liquid level detection, high/low level control and applicable interface-level applications.
For correct selection, share the liquid conductivity, number of required level points, tank dimensions, mounting arrangement, process connection, temperature, pressure and whether a level controller is required.
ProSens Automation — Coimbatore, Erode & Salem
Shipping available across India.
A conductive level switch detects a liquid level by sensing electrical conductivity between a common/reference electrode and one or more control electrodes.
The brochure specifies conductive liquids, including liquids with low density, high viscosity and solid particles, as well as interfaces between non-conductive and conductive liquids.
The specified minimum conductivity is 25 μS.
The general specification allows one to four control electrodes. The ordering table provides configurations of one, two, three or four electrodes, corresponding to the specified level arrangements.
Solid probes are specified up to 4 metres, while suspended probes are specified up to 10 metres.
The general specifications list SS304 and SS316. The ordering information additionally lists SS316L with PTFE insulation.
PVC insulation is specified up to 70°C, while PTFE insulation is specified up to 200°C.
Yes. The brochure specifically provides a conductive type level switch arrangement mounted in an external chamber for applications where direct vessel installation is not possible or desirable.
Yes. The brochure states that the switch can detect an interface between non-conductive and conductive liquids, and identifies interface measurement as one of the functions of the chamber arrangement.
The ordering information allows the level controller to be specified as required or not required. The brochure states that the factory should be contacted for ordering without a controller.
