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Applies to: evo2, evo2L, evo5, evo10, evo20, evo25, S40

 Overview

The magnet sensor (also known as the auto-close sensor) is a critical component that enables the automatic closing function of Elebia hooks. Unlike a simple magnetic switch, Elebia uses a pressure-sensitive technology inside the magnet. When a ferrous object (chain, master link, or lifting point) attaches to the magnet, it creates pressure that changes a resistive value, which the PCB detects to activate the auto-closing sequence.

important Safety Note: The magnets used in Elebia hooks (especially the S40) are extremely powerful neodymium magnets. They can cause serious injury if mishandled.

• Always follow safety instructions when handling magnets.
• Secure the magnet with a strap, cord, or zip tie before loosening any screws.
• Keep magnets away from pacemakers, electronic devices, and ferrous tools.

Auto-Close Configuration Options

Before replacing any hardware, verify the auto-close configuration. The hook has three auto-close modes, configurable via the eMini , eMAX remote or hook button by pressing continus th value will change, the beeps of the hook indicates the state of the autoclose value:

1. With the battery inserted, press and hold the manual button on the hook.
2. Continue holding until you hear the beep pattern (1, 2, or 3 beeps).
3. Release the button to select the desired mode.
4. The hook will beep to confirm the new setting.

If auto-close does not work, first verify that it is not set to "Off" 

Symptoms That Suggest the Magnet Sensor is Faulty

• The hook does not close automatically when a master link or chain is attached to the magnet.
• The hook closes immediately after opening (without any load attached), indicating the sensor is stuck in the "active" state.
• The eMAX shows the magnet sensor as "active" at all times.
• After adjusting the sensitivity, the problem persists.

Sensor Technology and Testing with a Multimeter

The magnet sensor provides a resistive value that changes when pressure is applied. This value is configurable in the eMAX parameters (sensitivity can be adjusted between 50 Ohms and 20 kOhms).

To test the sensor with a multimeter (tester):

1. Disconnect the battery from the hook.
2. Open the front cover to access the purple sensor cables connected to the PCB.
3. Disconnect the purple cables.
4. Set your multimeter to measure resistance (Ohms, Ω).
5. Place the multimeter probes on the two purple cables.
6. Without pressing anything: The multimeter should show a very high resistance (open loop / infinite).
7. Attach a ferrous object (master link or piece of steel) to the magnet: The resistance value should change significantly.
8. If the resistance does not change at all (remains open loop): The pressure sensor inside the magnet is faulty and the entire magnet assembly must be replaced. 
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Sensor and Auto-Close Mechanism by Model

1. The plunger (ball detent) is depressed (shackle is correctly aligned with the lifting eyepad).
2. The magnet pressure sensor detects a ferrous object.

These two switches are connected in series. If either fails (open loop), the hook will not auto-close.

To diagnose the S40:

• Disconnect the purple sensor cables and test the magnet pressure sensor with a multimeter (as described in Section 4).
• Test the plunger: Press the plunger manually. If the resistance changes (closed circuit), the plunger is working. If it remains open loop, the plunger switch is faulty.

Replacement Procedure for EVO Family (evo2 to evo25)

Step 1: Disconnect power. Remove the battery from the hook.

Step 2: Remove the front cover. Using hex keys, remove the screws securing the front cover.

Step 3: Access the PCB

• For evo2 / evo2L: Remove the plastic PCB cover.
• For evo5–evo25: The PCB is visible after removing the front cover.

Step 4: Disconnect the purple sensor cables
Locate the two purple wires coming from the magnet sensor. Disconnect them from the PCB (remove any hot glue if present).

Step 5: Remove the magnet assembly

Step 6: Install the new magnet assembly Placethe new magnet assembly in position and secure it with the screws.
Step 7: Reconnect the purple sensor cables Connect the new purple cables to the PCB. Apply hot glue to secure the connector if the original had it.

Step 8: Reassemble the hook Reinstall the PCB cover (if applicable) and the front cover. Secure all screws.

Step 9: Adjust sensitivity (if needed) Using the eMAX, navigate to the magnet sensor parameters and adjust the sensitivity (between 50 Ohms and 20 kOhms) as required for your application.

Replacement Procedure for S40

Warning: The S40 magnet is extremely powerful and can cause serious injury or damage if it moves unexpectedly.

• Secure the magnet in its housing using a strap, cord, or zip tie.
• Keep all ferrous tools away from the magnet area.
• This procedure should only be performed by qualified service personnel.

Step 1: Disconnect power. Remove the battery from the S40.

Step 2: Open the magnet housing cover. Remove the small cover that protects the magnet housing.

Step 3: Secure the magnet. Use a strap, cord, or zip tie to hold the magnet firmly in its housing. The magnet will try to jump out as soon as the screws are loosened.

Step 4: Disconnect the sensor cables. Locate the sensor cables coming from the magnet. Disconnect them from the main PCB.

Step 5: Remove the old sensor.
Inside the magnet housing, you will find:

• The pressure sensor.
• A plastic cover.
• The plunger (ball detent) screwed into the magnet support.

Carefully remove the faulty sensor.

Step 6: Install the new sensor. Place the new sensor in the correct position. Reinstall the plastic cover and ensure the plunger moves freely.

Step 7: Reconnect the cables. Connect the new sensor cables.

Step 8: Close the housing. Once verified, close the magnet housing cover and secure all screws.

Step 9:  Test the sensor before final assembly With the magnet still secured, use a multimeter to test that the resistance changes when pressure is applied (attach a ferrous object to the magnet). 

Step 10: Adjust sensitivity (if needed). Using the eMAX, adjust the sensitivity (between 50 Ohms and 20 kOhms) as required.

Important Notes for evo2 / evo2L

On the evo2 and evo2L models, the magnet housing is secured with 4 screws from below. The magnet is very close to the forging hook. If the magnet housing is deformed (due to impacts or overload), it may rub against the forging hook. This friction can prevent the hook from traveling through its full range of motion, causing auto-close issues and mechanical wear.

How to Order a Replacement Magnet / Sensor

To order a replacement magnet assembly or sensor, please visit the spare parts portal. [here]

Provide the following information:

• Hook model (evo2, evo5, evo10, evo20, evo25, or S40)
• Hook serial number
• Part description (e.g., "Magnet assembly with pressure sensor for evo10")

Verification Checklist

After completing the replacement, verify the following:

• The hook auto-closes when a master link or chain is attached to the magnet.
• The hook does not auto-close.
• The auto-close mode (Off / On / On with delay) is correctly configured.
• The sensitivity is adjusted appropriately for yourlifting type.
• On evo2/evo2L, the forging hook moves freely without rubbing against the magnet housing.
• On S40, the plunger (ball detent) moves freely and the shackle aligns correctly with the lifting point.

When to Escalate

If after replacing the magnet sensor and verifying the configuration the hook still does not auto-close correctly, contact Elebia technical support for further assistance.

For further inquiries or assistance, please contact our customer support team. We are here to help!