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31LV2E48 – LEVEL CONTROL LV2E 24/48V
Lovato Electric 31LV2E48 is an LV2E plug-in conductive liquid level control relay with an automatic emptying function, dual 24/48 V AC supply, three-electrode monitoring and one SPDT changeover relay output.
£151.99
Why Choose the Lovato Electric 31LV2E48 Level Control Relay?
The Lovato Electric 31LV2E48 is an LV2E conductive liquid level control relay designed specifically for automatic emptying applications in tanks, reservoirs, wells and industrial process systems. Its dual-voltage 24/48 V AC supply and plug-in construction provide a practical solution for low-voltage control panels and automated pump systems.
The relay monitors electrically conductive liquids using up to three external electrodes. With a fixed sensitivity of 7–8 kΩ and an electrode voltage of 9 V AC, the 31LV2E48 detects changes in liquid level and operates its changeover relay output to control associated pumps, contactors, valves or signalling equipment.
Designed for an 11-pin plug-in socket, the 31LV2E48 features automatic resetting, a red LED for relay status and a single SPDT changeover output. Its self-extinguishing polycarbonate housing measures just 38 × 76 × 70 mm, making it a compact and serviceable choice for industrial liquid-level control installations.
Key Advantages
- Dedicated emptying function for automatic conductive liquid level control.
- Dual-voltage 24/48 V AC supply simplifies use across low-voltage control systems.
- Supports up to three sensing electrodes for liquid-level detection.
- Fast operation with a tripping time of ≤0.05 s and resetting time of ≤0.1 s.
- Single SPDT changeover relay output for straightforward integration with control equipment.
- 11-pin plug-in construction makes relay replacement and servicing convenient.
Key Features
- Lovato Electric LV2E level monitoring relay.
- Designed for electrically conductive liquids.
- Emptying control function with automatic resetting.
- Rated dual supply voltage of 24/48 V AC.
- Rated frequency of 50/60 Hz.
- Fixed sensitivity of 7–8 kΩ.
- 9 V AC voltage between sensing probes.
- One SPDT changeover relay contact.
- Red LED relay-status indicator.
- Plug-in installation using an 11-pin S11 socket.
Automatic Emptying Control for Conductive Liquids
The Lovato 31LV2E48 operates by applying a low 9 V AC sensing voltage between external electrodes installed at the required liquid levels. Conductive liquid completing the electrical path between the probes allows the relay to determine the level condition and operate its output accordingly, providing an effective method of controlling liquid removal without mechanically moving float mechanisms.
With its dedicated emptying function, the 31LV2E48 can be integrated with a pump contactor or other switching device to automatically remove liquid as predetermined levels are reached. Its fast response, automatic resetting and plug-in design make it well suited to pump panels, water-management systems and industrial process equipment requiring dependable conductive level monitoring.
Typical Applications
- Sump and drainage pump control.
- Automatic tank and reservoir emptying.
- Water level monitoring systems.
- Industrial process vessel level control.
- Wastewater and drainage installations.
- Building-services and industrial pump control panels.
Technical Specifications
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| Supply Voltage | 24 V AC | |
|---|---|---|
| Coil / Supply Voltage | 24–48 V AC | |
| IP Rating | IP30 | |
| Sensing Principle | Level (conductive) | |
| Manufacturer | Lovato Electric | |
| Series | LV2E | |
| Model | 31LV2E48 | |
| Manufacturer part number | 31LV2E48 | |
| Product type | Level monitoring relay | |
| Suitable liquid | Conductive liquids | |
| Function | Emptying | |
| Reset | Automatic | |
| Supply type | Dual voltage AC | |
| Rated supply voltage (Us) | 24/48 V AC | |
| Operating voltage range | 0.85–1.1 × Us | |
| Rated frequency | 50/60 Hz | |
| Maximum power consumption | 5.5 VA | |
| Maximum power dissipation | 2.8 W | |
| Number of connectable electrodes | 3 | |
| Compatible electrode systems | SN1, SCM, CGL, PS31, PS3S or similar | |
| Electrode voltage | 9 V AC between probes | |
| Sensitivity | 7–8 kΩ fixed | |
| Tripping time | ≤0.05 s | |
| Resetting time | ≤0.1 s | |
| Number of relay outputs | 1 | |
| Contact arrangement | 1 changeover contact, C/O-SPDT | |
| IEC conventional free-air thermal current (Ith) | 5 A at ≤40 °C | |
| Rated operational voltage AC | 220 V AC | |
| Maximum switching voltage | 380 V AC | |
| Utilisation designation | B300 | |
| Electrical life | 2.5 × 105 cycles at rated load | |
| Mechanical life | 50 × 106 cycles | |
| Status indication | 1 red LED for relay state | |
| Connection | 11-pin plug-in | |
| Required socket | S11 | |
| Rated insulation voltage (Ui) | 415 V | |
| Rated impulse withstand voltage (Uimp) | 5 kV | |
| Operating temperature | -20 to +60 °C | |
| Storage temperature | -30 to +80 °C | |
| Housing material | Self-extinguishing polycarbonate | |
| Protection rating | IP30 | |
| Dimensions (W × H × D) | 38 × 76 × 70 mm | |
| Product weight | approx. 266 g | |
| EAN / GTIN | 8013975015179 | |
| ETIM classification | EC001447 – Level monitoring relay | |
| HS Code | 85389091 |
Frequently Asked Questions
What is the Lovato 31LV2E48 used for?
The 31LV2E48 is a conductive liquid level monitoring relay with an emptying function, designed to control equipment such as pumps according to the liquid level detected by external electrodes.
What supply voltage does the Lovato 31LV2E48 require?
The relay has a dual-voltage supply and can operate from 24 V AC or 48 V AC at 50/60 Hz.
How many electrodes can be connected to the 31LV2E48?
The 31LV2E48 supports up to three electrodes. Lovato lists compatible electrode and holder families including SN1, SCM, CGL, PS31 and PS3S.
What is the sensitivity of the Lovato 31LV2E48?
The relay has a fixed sensing sensitivity of 7–8 kΩ and applies approximately 9 V AC between the level probes.
What output contact does the 31LV2E48 provide?
The relay provides one SPDT changeover contact with an IEC conventional free-air thermal current rating of 5 A at temperatures up to 40 °C.
Does the Lovato 31LV2E48 reset automatically?
Yes. The 31LV2E48 features automatic resetting as part of its conductive liquid emptying-control operation.
What socket is required for the Lovato 31LV2E48?
The relay uses an 11-pin plug-in housing and is designed for installation with the Lovato S11 socket.
Can the Lovato 31LV2E48 monitor non-conductive liquids?
No. Its sensing principle relies on electrical conductivity between the electrodes, so the 31LV2E48 is intended for electrically conductive liquids.
Trusted by Panel Builders and Automation Professionals
Lovato Electric level monitoring relays provide practical solutions for conductive liquid control in industrial and building-services applications, helping panel builders, machine manufacturers and automation professionals implement reliable pump, drainage and process level control systems.
