Level Electrodes for use with liquid level controllers

Liquid Level Electrodes

We offer a range of liquid level electrodes which are designed to fully automate processes where the level of liquid contained within a tank or other vessel.

When combined with a level controller the level electrodes allows a system to automatically carry out a number of actions. Commonly the level electrodes are used to trigger high alarms, start actions, or end actions as required.

Our level electrodes are designed to work in conjunction with a level controller to give a relay switching point for common tasks. This often includes starting / stopping pumps, opening / closing valves, or triggering remote alerts to chemical suppliers.

Where multiple actions are required, a level electrode holder with multiple level electrodes can be used in conjunction with multiple level controllers. This often includes actions such as controlling liquid levels between two points and using local high / low level alarms.

How many level electrodes do I need?

A typical level electrode system uses a minimum of 3 level sensors.

The first sensor and normally the longest is the ground or reference level electrode, which should always be immersed in the process liquid.

The number of electrodes required after this is normally designated by what functions are required. It is strongly advisable to only use one level electrode for one function - doubling up can cause interference problems.  Some of the common level electrode functions are highlighted below:-

High Level Alarm

The high level alarm works with a reference electrode and a high level alarm electrode.

When the liquid level rises above the reference and meets the level alarm electrode - the level controller signals a high level has been met.

Low Level Alarm

When used for a low level application we use a reference electrode and a single low level electrode.

When the liquid level falls below the low level electrode, but above the reference electrode - the controller indicates a low level. 

Pumping Out Between Levels

In this setup we have a long reference electrode, a P1 Start Level Electrode and P2 Stop Level Electrode. 

When the tank fills and reaches P2 - the level controller calls for the pump to start discharging the liquid from the tank. 

As the liquid is pumped out of the tank, it falls below the P1 level electrode. When this happens the level controller calls for the pump to stop pumping.

Pumping In Between Levels

In this setup we have a long reference electrode, a P1 Stop Level Electrode and P2 Start Level Electrode. 

When the tank empties and reaches P2 - the level controller calls for the pump to start filling the liquid in the tank. 

As the liquid is pumped into the tank, it reaches the P1 level electrode. When this happens the level controller calls for the pump to stop pumping.

Level Electrodes in Concentrated Chemicals

Automated level control where concentrated chemicals are used is a very common application - any removal of manual involvement in chemical handling is commendable particularly when those chemicals are process strength.

As such  - we offer our level electrodes in a number of different materials. These include:-

  • 316 Stainless Steel
  • Hastelloy C
  • Titanium
  • Plastic Coated
  • PVC & Carbon

We're also able to offer custom materials and lengths suitable for a range of applications.

Level Electrode Mounting

We offer a range of mounting types for our level electrodes - commonly these are manufactured with a threaded BSP connection for screwing into a compatible fitting, alternatively we offer flange and union fittings as required.
Alternatively - we offer custom fabricated surface / wall mounting brackets to accommodate a number of level electrodes.

Level Electrode Range


LE20

LE20

The LE20 Level Electrode holder is a designed a simple and straight forward level electrode holder. 

Supplied with 3 x 900 mm long plastic coated level electrodes, these are designed to be cut to length to operate in your process. Whether it's pumping between levels or operating a high or low alarm, the LE20 is simple to use and the lengths fully customised.

The 3 x 3 mm Ø level electrodes are manufactured in 316 Stainless Steel with a plastic coating, and mounting is achieved via a 3/4" BSP thread. 

The electrical connection is from a Hirschmann Connector with gland, allowing simple and easy integration to a level controller.

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LE7

LE7

The LE7 is a corrosion resistant single level electrode holder designed for mounting into large tanks and pits. 

The LE7 has a 3/4" BSP mounting thread and holds a 1/4" diameter level electrode. These are available in the following materials:- 

  • Stainless Steel
  • Titanium
  • Hastelloy C
  • Plastic coated

The level electrodes are manufactured to any required length up to 3 metres and the electrical connection is via top mounting gland. 

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LE6/3

LE6/3

The LE6/3 is a corrosion resistant level electrode holder designed for use in chemical applications. 

For greater mounting flexibility the LE6/3 is available with either flange mounting or union mounting for use with tanks, pits and weirs. 

The LE6/3 is manufactured in PVC with Carbon electrodes to offer greater chemical resistance. The level electrodes are supplied as a 3 x 1.2 metre length level electrodes or manufactured to suit. 

The electrical connections for the LE6/3 is via a top mounting gland. 

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LE6/5

LE6/5

The LE6/5 is a corrosion resistant level electrode holder designed for use in chemical applications where high and low level switching is required. 

For greater mounting flexibility the LE6/5 is available with either flange mounting or union mounting for use with tanks, pits and weirs. 

The LE6/5 is manufactured in PVC with Carbon electrodes to offer greater chemical resistance. The level electrodes are supplied as a 5 x 1.2 metre length level electrodes or manufactured to suit. 

The electrical connections for the LE6/5 is via a top mounting gland. 

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LE8/3

LE8/3

The LE8/3 is a corrosion resistant PVC level electrode holder designed to be mounted into place using a 1 1/2" BSP mounting thread. 

The LE8/3 is designed to accommodate up to 3 x Level Electrodes which can be manufactured in the following materials:-

  • Stainless Steel
  • Titanium
  • Hastelloy C
  • Plastic coated

The 3 x level electrode lengths are available in custom sizes up to 3 metres in length. 

The electrical connections of the LE8/3 are via side mounted sealing gland.

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LE8/5

LE8/5

The LE8/5 is a corrosion resistant PVC level electrode holder designed to be mounted into place using a 1 1/2" BSP mounting thread. 

The LE8/5 is designed to accommodate up to 5 x Level Electrodes which can be manufactured in the following materials:-

  • Stainless Steel
  • Titanium
  • Hastelloy C
  • Plastic coated

The 5 x level electrode lengths are available in custom sizes up to 3 metres in length. 

The electrical connections of the LE8/5 are via side mounted sealing gland.

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