1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your KAOLALI Fuel Level Sensor. This high-quality sensor is designed for accurate measurement of fuel and water levels in various applications, including automotive and marine vehicles. Please read this manual thoroughly before installation and use to ensure proper function and safety.

Image 1.1: KAOLALI Fuel Level Sensor (example length 200mm)
2. Consignes de sécurité
Respectez toujours les consignes de sécurité suivantes lors de l'installation et du fonctionnement :
- Ensure the power supply is disconnected before performing any installation or maintenance to prevent electrical shock.
- Work in a well-ventilated area, especially when dealing with fuel tanks, to avoid inhaling fumes.
- Utilisez un équipement de protection individuelle (EPI) approprié tel que des gants et des lunettes de protection.
- Verify all connections are secure and properly insulated to prevent short circuits or leaks.
- Do not modify the sensor or its components, as this may compromise its performance and safety.
- Consultez un professionnel qualifié si vous avez des doutes concernant une quelconque étape du processus d'installation.
3. caractéristiques du produit
- Matériel: Constructed from high-grade 316 stainless steel for effective performance, advanced corrosion resistance, and long service life.
- Durabilité: Designed with anti-vibration and anti-explosion properties for reliable operation in demanding environments.
- Plage de longueur : Available in lengths from 200mm to 1000mm to suit various tank depths.
- Sortie de signal: Provides a standard 240-33 ohm signal output, compatible with most common fuel gauges.
- Indice de protection : IP67 rated, ensuring protection against dust and temporary immersion in water.
- Large application : Suitable for use with fuel, water, kerosene, chemical tanks, and any type of liquid without impurities.
- Montage: Features a standard SAE 5-hole mounting pattern for easy installation.
4. Contenu du colis
À l'ouverture du colis, veuillez vérifier que tous les composants suivants sont présents :
- 1 x Fuel/Water Level Sender Unit
- 1 x Joint
- 5 vis M5 x 16

Image 4.1: Package Contents - Sensor, Gasket, and Screws
5. Spécifications
| Spécification | Valeur |
|---|---|
| Matériel | Acier inoxydable 316 |
| Méthode de montage | SAE 5-Hole Pattern |
| Plage de longueur | 200mm - 1000mm (depending on model) |
| Sortie de signal | 240-33 Ohms |
| Indice de protection | IP67 |
| Température de fonctionnement | -40 ℃ à +85 ℃ (-40 ℉ à +185 ℉) |
| Taille de la vis | M5 x 16 |
6. Installation
Follow these steps for proper installation of the fuel level sensor:
- Préparez le réservoir : Ensure the tank is empty or the liquid level is below the installation point to prevent spills. Clean the mounting surface around the existing opening or prepare a new opening according to the SAE 5-hole pattern.
- Positionnez le joint : Place the provided gasket onto the mounting flange of the sensor. This ensures a watertight seal.
- Insérer le capteur : Carefully insert the sensor into the tank opening. Ensure the float mechanism has free movement and does not obstruct any internal tank components.
- Sécurisez le capteur : Align the 5 holes on the sensor flange with the holes on the tank. Insert the M5 x 16 screws and tighten them evenly in a star pattern to ensure a secure and leak-free seal. Do not overtighten.
- Connexions de câblage : Connect the sensor wires to your fuel gauge or monitoring system. The sensor typically has two wires: one for signal output (usually red or brown) and one for ground (usually blue or black). Refer to your gauge's wiring diagram for specific connections.

Image 6.1: Sensor Mounting Flange and Wiring
7. Fonctionnement
The KAOLALI Fuel Level Sensor operates by using a float that moves along a rod, changing the electrical resistance as the liquid level rises or falls. This resistance change is then interpreted by a compatible fuel gauge or monitoring system, which displays the current liquid level.
- Ensure your gauge is compatible with a 240-33 ohm input signal.
- Once installed and wired correctly, the gauge should provide an accurate reading of the tank's contents.
- The sensor is designed for continuous operation and does not require manual intervention during normal use.
8. Entretien
The KAOLALI Fuel Level Sensor is designed for minimal maintenance. However, periodic checks can help ensure its longevity and accuracy:
- Inspection visuelle : Periodically inspect the sensor for any signs of physical damage, corrosion, or loose connections.
- Nettoyage: If accessible, gently clean any buildup or debris from the sensor rod and float. Avoid using harsh chemicals that could damage the materials.
- Intégrité du joint : Check the mounting gasket for any signs of wear or leakage. Replace if necessary to maintain a watertight seal.
9. Dépannage
If you experience issues with your fuel level sensor, consider the following troubleshooting steps:
| Problème | Cause possible | Solution |
|---|---|---|
| No reading on gauge | Câblage desserré ou incorrect Jauge défectueuse Dysfonctionnement du capteur | Check all wiring connections for security and correct polarity. Test the gauge with a known good signal. If wiring and gauge are fine, the sensor may need replacement. |
| Lecture inexacte | Incorrect sensor length for tank Obstruction du flotteur Problème d'étalonnage de la jauge | Verify the sensor length matches the tank depth. Inspect the float for free movement. Check if the gauge requires calibration or is compatible with 240-33 ohm input. |
| Intermittent reading | Connexion lâche Problème de capteur interne | Check all wiring connections. If connections are secure, the sensor may have an internal fault and require replacement. |
| Fuite au point de fixation | Improperly tightened screws Joint endommagé | Ensure screws are tightened evenly. Inspect and replace the gasket if damaged. |
10. Garantie et assistance
KAOLALI fournit un Garantie de qualité de 1 ans under regular use conditions for this product. If you have any questions regarding technical aspects, installation, or usage, please do not hesitate to contact us. We are committed to providing prompt assistance.
Pour obtenir de l'aide, veuillez consulter les informations de contact fournies avec votre achat ou visiter le site officiel de KAOLALI. website.





