Finder 072.31 – 72 Series Level control relays – Accessory

Why Choose the Finder 072.31 Suspended Liquid Level Electrode?

The Finder 072.31 is a compact and durable suspended liquid level sensing electrode designed for monitoring conductive liquids in wells, tanks, reservoirs and industrial process systems. As part of the Finder 72 Series liquid level monitoring accessories, this single-pole sensor provides a practical solution for detecting liquid levels when connected to compatible Finder 72.01 and 72.11 monitoring relays.

Manufactured with a stainless steel AISI 316L sensing electrode and a chemically resistant polypropylene housing, the Finder 072.31 is designed for dependable operation in a wide range of liquid monitoring environments. Its construction offers resistance to many aqueous solutions, including inorganic salts, acids, alkaline solutions, alcohols, certain oils and washing solutions, making it suitable for industrial and process control applications where material compatibility is essential.

With a maximum liquid temperature of +80 °C, a maximum conductor cross-section of 2.5 mm² and a compact cylindrical design, the Finder 072.31 is particularly suitable for liquid level monitoring in tanks and wells. Its cable connection arrangement allows installers to select a suitable cable length for the installation, providing flexibility when positioning sensing electrodes within liquid storage and process vessels.

Key Advantages

• Compact single-pole suspended electrode for conductive liquid level monitoring.
• Compatible with Finder 72.01 and 72.11 liquid level control relays.
• AISI 316L stainless steel electrode provides excellent corrosion resistance.
• Polypropylene housing offers resistance to a wide range of industrial liquids and aqueous solutions.
• Suitable for liquid temperatures up to +80 °C.
• Supports filling and emptying control applications when connected to a compatible monitoring relay.
• Allows custom cable lengths to suit different tank depths and installation requirements.
• Compact cylindrical construction simplifies installation in wells, tanks and reservoirs.
• Suitable for industrial water treatment, liquid storage and process automation systems.
• Practical sensing accessory for applications requiring reliable conductive liquid detection.

Key Features

• Finder 72 Series liquid level monitoring accessory.
• Single-pole suspended electrode for conductive liquid detection.
• Designed for use with Finder 72.01 and 72.11 monitoring relays.
• AISI 316L stainless steel sensing electrode with high corrosion resistance.
• Polypropylene sensor housing for chemical resistance.
• Maximum liquid temperature of +80 °C.
• Maximum conductor cross-section of 2.5 mm².
• Maximum terminal tightening torque of 0.7 Nm.
• Recommended wire stripping length of 5–9 mm.
• Compact cylindrical housing with approximately 76 mm overall length.
• 22 mm upper body diameter and 19 mm lower body diameter.
• Designed for connection to a separately selected sensing cable.
• Suitable for detecting minimum, maximum and intermediate conductive liquid levels.
• Supports automatic pump control and liquid level alarm applications through a compatible relay.

Reliable Conductive Liquid Level Monitoring for Industrial Applications

Conductive liquid level monitoring is widely used in industrial automation, water management and process control systems. By detecting the electrical conductivity of a liquid between sensing electrodes, a compatible monitoring relay can determine whether the liquid has reached a particular level and activate an appropriate control or alarm function.

The Finder 072.31 suspended electrode provides a reliable sensing point for these applications. When installed at the required level inside a tank, well or reservoir, the electrode detects contact with a conductive liquid. The connected Finder 72.01 or 72.11 liquid level control relay interprets the sensing condition and operates its output contacts according to the selected filling or emptying function.

For applications requiring minimum and maximum liquid level control, multiple sensing electrodes can be installed at different heights. This arrangement allows the monitoring relay to manage pump operation, maintain liquid levels within a specified range or provide an alarm when the liquid reaches a predetermined sensing point.

The Finder 072.31 combines an AISI 316L stainless steel electrode with a polypropylene housing. The stainless steel sensing element offers high corrosion resistance, while the polypropylene body provides resistance to many aqueous chemical solutions. This makes the sensor particularly useful in industrial liquid handling systems where conventional materials may be exposed to challenging operating conditions.

Unlike fixed-cable suspended electrodes, the Finder 072.31 allows the installer to connect a suitable cable selected for the required installation depth. This provides flexibility for installations involving different tank sizes, well depths and process vessel configurations.

The Finder 072.31 is a passive sensing electrode rather than a standalone liquid level controller. It requires a compatible monitoring relay and an appropriate electrode arrangement to provide switching, signalling or pump control functionality. Detection depends on the electrical conductivity of the liquid, and suitability for particular chemicals or process fluids should be assessed against the electrode and housing materials.

Typical Applications

• Conductive liquid level monitoring in industrial storage tanks.
• Water level detection in wells and reservoirs.
• Automatic pump filling and emptying control systems.
• Industrial water treatment and liquid handling installations.
• Minimum and maximum liquid level monitoring.
• Liquid level alarms in process vessels and storage systems.
• Building services water management and pump control equipment.
• Industrial washing and cleaning machinery.
• Chemical processing systems with compatible conductive liquids.
• Food and pharmaceutical process installations where material and process compatibility requirements are satisfied.
• Manufacturing equipment requiring automated liquid level detection.
• OEM automation systems using Finder 72 Series liquid level monitoring relays.