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LIGO AIR is a wireless fuel level sensor designed by SOJI Electronics for measuring liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage. Equipped with Bluetooth Low Energy 5.4 technology, LIGO AIR enables seamless, real-time data transmission without the need for complex wiring, making installation fast and reducing the risk of signal wire tampering.
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<div class="product-page-desc"><section begin="product-desc" />Wireless 2.4 GHz fuel sensor for diesel/gasoline tanks, designed for harsh environments (−40°C to +85°C).<section end="product-desc" /></div>


[[File:LIGO-AIR-product-overview.png|thumb|right|400px|LIGO AIR series Fuel Level Sensor]]
* [[LIGO AIR Datasheet|Datasheet]]
* [[LIGO AIR User Guide|User Guide]]
* [[LIGO AIR Certification & Approvals|Certifications & Approvals]]
* [[LIGO AIR Product Change Notifications|Product Change Notifications]]
* [[LIGO AIR Firmware Changelog|Firmware Changelog]]
* [[LIGO AIR Promotional Material|Promotional Material]]
* [[LIGO AIR Video|Video]]


== About LIGO Air ==
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LIGO AIR is engineered for the transport telematics market where reliability, long battery life, and stable long-range wireless communication are critical. Typical use cases include:
[[File:LIGO-AIR-product-overview.png|320px|center|LIGO AIR]]
 
<div style="text-align: center; font-size: 0.9em; color: #54595d; margin-top: 4px;">LIGO AIR</div>
* '''Fleet & transport''' — trucks, excavators, cement mixer trucks, heavy construction machines
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* '''Marine''' — vessels and offshore platforms
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* '''Power generation''' — diesel generators, backup power systems
* '''Industrial storage''' — oil storage tanks, stationary fuel storage
* '''Off-highway machinery''' — environments with high temperature and vibration
 
The LIGO AIR family supports three industry-standard advertising protocols selectable from the mobile app: '''SOJI''' (default), '''Mielta''', and '''Escort''' — allowing seamless integration with existing telematics platforms.
 
== Product Variants ==
 
The LIGO AIR series offers three versions, each optimized for a different operational priority:
 
{| class="wikitable"
! Variant !! Description !! Battery Life !! Range
|-
| '''LIGO AIR LxS''' || Standard cost-effective version for essential monitoring needs || 6–8 years    || Standard
|-
| '''LIGO AIR LxT''' || Extended-battery version for long operational life in harsh environments || '''8–12 years''' || Standard
|-
| '''LIGO AIR PRO''' || Long-range version with high TX power for obstructed environments || 6–8 years    || '''2× Standard'''
|}
 
{| class="wikitable"
! Manufacturer Part Number !! Length L (mm)
|-
| LIGO AIR – L7S, L7T, LIGO AIR PRO – L7S          || 700 ± 3
|-
| LIGO AIR – L10S, L10T, LIGO AIR PRO – L10S      || 1000 ± 3
|-
| LIGO AIR – L15S, L15T, LIGO AIR PRO – L15S      || 1500 ± 3
|}
 
''Customized lengths up to 6000 mm are available on request.''
 
== Product Specification ==
 
=== Features ===
 
{| class="wikitable"
! Category !! Specification
|-
| Functionality      || Wireless fuel level sensor with BLE 5.4 advertising
|-
| Measuring accuracy || ± 0.5 % (up to 99.5 %)
|-
| Standard length    || 700 / 1000 / 1500 mm (custom up to 6000 mm)
|-
| Dimensions (head)  || 87.1 × 84.6 × 31 mm
|-
| Probe diameter    || Ø 20 / Ø 36 mm
|-
| Weight            || See variant datasheet
|-
| Battery            || Built-in Li-SOCl₂ 3.6 V × 2400/2600/3600 mAh (replaceable)
|-
| Current consumption || 9 µA (LIGO AIR), 27 µA (LIGO AIR PRO) in working mode; 4 µA in storage mode
|-
| Battery life      || 8–10 years (standard); 8–12 years (LxT)
|-
| Memory            || Built-in 32 Mb EEPROM — 90 days of data logs, max 500 setting logs
|-
| Accelerometer      || Built-in (LIGO AIR PRO)
|-
| Anti-mud filter    || Yes — oil filter and anti-vibration springs
|-
| Connectivity      || Bluetooth Low Energy 5.4, IEEE 802.15.4-2006, 2.4 GHz
|-
| Sensitivity        || -95 dBm
|-
| TX power max      || 6 dBm (LIGO AIR), 19.5 dBm (LIGO AIR PRO)
|-
| Antenna            || Directional — 1.5× range vs. typical market sensors
|-
| Advertising interval || 5–10 s (LIGO AIR), 10–15 s (LIGO AIR PRO)
|-
| Casing            || Heavy-duty metal structure
|-
| Operating temperature || -40 °C to +85 °C
|-
| Storage condition  || 15 °C to 30 °C, RH < 60 %
|-
| Ingress protection || '''IP69K''' (dust-tight, high-pressure / high-temperature water jet resistant)
|-
| Protocol support  || SOJI (default), Mielta, Escort
|-
| Average service life || 10 years (expected)
|-
| Warranty          || 3 years from shipment (battery excluded)
|}
 
=== Dimensions ===
 
[[File:LIGO-AIR-dimensions.png|thumb|center|500px|LIGO AIR series overall dimensions (mm)]]
 
== Value-adding Features ==
 
=== Directional Antenna ===
 
LIGO AIR's directional antenna technology achieves communication range '''1.5 times greater''' than typical market-available wireless fuel sensors. The directional arrow on the sensor cover indicates the optimal orientation toward the receiver.
 
[[File:LIGO-AIR-orientation.png|thumb|center|500px|Correct sensor orientation — directional arrow must point toward the receiving device]]
 
=== Storage Mode ===
 
To preserve battery during transport and warehouse storage, LIGO AIR enters a low-power storage mode with consumption as low as '''4 µA''', extending shelf life dramatically. The sensor automatically wakes up when installed and triggered via the mobile app.
 
=== Built-in Anti-Tampering Design ===
 
Wireless transmission eliminates signal wires that can be cut or tampered with. The protective cap mechanism additionally prevents unauthorized access to the sensor body.
 
=== Heavy-duty Metal Structure ===
 
The reinforced metal casing meets '''IP69K''' standards — protection against dust, moisture, vibration, and high-temperature high-pressure water jets — ensuring sensor durability equal to or greater than traditional wired sensors.
 
== Mounting Recommendations ==
 
* Install the sensor in the direction of maximum signal transmission. The directional arrow on the sensor cover must point toward the receiving device.
* Ensure a minimum clearance of '''150 mm''' between the top of the sensor and any overhead metal surface.
* Mount as close as possible to the tank's geometric center and at its deepest point.
* Avoid contact with reinforcement ribs and other equipment inside the tank.
* Minimum allowable length of the measuring probe after cutting is '''150 mm'''.
 
[[File:LIGO-AIR-clearance.png|thumb|center|400px|Minimum 150 mm clearance from overhead metal surface]]
 
For complete step-by-step installation instructions, refer to '''[[LIGO Air Manual]]'''.
 
== Solutions for Long-Range or Metal-Obstructed Environments ==
 
When the distance between sensor and receiver is long, or there are many metal obstacles, customers can choose '''LIGO AIR PRO''' (higher TX power) or install the '''LIGO AIR Adapter''' at the receiver side to boost signal reception.
 
{| class="wikitable"
! Device combination !! Bluetooth signal range
|-
| LIGO AIR + Telematics (tracker) device || Standard distance
|-
| LIGO AIR + LIGO AIR Adapter            || '''2 ×''' Standard distance
|-
| LIGO AIR PRO + LIGO AIR Adapter        || '''4 ×''' Standard distance
|}
 
== LIGO BLE Configurator App ==
 
LIGO AIR is configured via the '''LIGO BLE Configurator''' mobile app, available on:
 
* '''iOS''' — App Store
* '''Android''' — Google Play (CH Play)
 
The application supports:
 
* Device discovery and pairing
* Real-time sensor data view (fuel level, temperature, battery voltage, RSSI, firmware version)
* '''Set Empty / Set Full''' calibration procedure
* Protocol selection (SOJI / Mielta / Escort)
* Measurement and advertising interval configuration
* Password change for unauthorized access prevention
 
[[File:LIGO-AIR-device-list.png|thumb|center|400px|LIGO BLE Configurator — device list]]
 
Full configuration instructions are documented in '''[[LIGO Air Configuration]]'''.
 
== Telematics Integration ==
 
LIGO AIR transmits data via BLE advertising packets containing fuel level, battery voltage, temperature, firmware version, and operation mode. The sensor is compatible with any BLE-capable telematics device (FM tracker) that supports beacon scanning.
 
=== Compatibility ===
 
LIGO AIR has been tested and verified with major telematics platforms supporting:
 
* '''SOJI Protocol''' (native — full feature set)
* '''Mielta Protocol''' (Mielta Group compatible trackers)
* '''Escort Protocol''' (Escort Group compatible trackers)
 
Detailed advertising message format, hardware ID mapping, payload decoding examples and example AVL packet parsing are documented in '''[[LIGO Air Configuration]]''' (section "Protocol Integration").
 
== Calibration ==
 
After installation, the sensor must be calibrated to ensure accurate volume measurement. Calibration can be performed in two ways:
 
{| class="wikitable"
! Method !! Description !! Recommended
|-
| Calibration table on the Platform (Server) || Sensor sends raw level values (0–4095). Platform converts to volume (liters) using calibration table || '''✓ Recommended'''
|-
| Calibration table on the Sensor            || Sensor directly sends volume values (liters) based on internal calibration table ||
|}
 
Procedure (Set Empty / Set Full) is described in '''[[LIGO Air Configuration]]'''.
 
== Safety Information ==
 
* Empty and ventilate the fuel tank before installation. For gasoline tanks, '''all fuel vapors must be removed''' to prevent fire or explosion.
* Do not expose the sensor to mechanical impact or pressure beyond rated specifications.
* If the sensor body or cap is visibly damaged, do not install — contact the manufacturer for replacement.
* The battery is not user-serviceable except by trained technicians using manufacturer-supplied replacement cells.
* Operating, transport and storage conditions must comply with the specifications in the [[LIGO Air Manual|Manual]] for the warranty to apply.
 
== Certification & Approvals ==
 
LIGO AIR conforms to international regulations for wireless devices and industrial equipment. See full list of regional approvals and standards on the dedicated page:
 
➤ '''[[LIGO Air Certification & Approvals]]'''
 
== Memberships ==
 
LIGO AIR's compliance with industry organizations (Bluetooth SIG, WEEE, Battery WEEE, etc.) is documented here:
 
➤ '''[[LIGO Air Memberships]]'''
 
== Nomenclature & Classification Codes ==
 
Customs codes (HS, HTS, CN, ECCN), product part numbers, and country of origin information are documented here:
 
➤ '''[[LIGO Air Nomenclature, classification codes]]'''
 
== External Links ==
 
=== Product Page ===
* [https://sojielectronics.com SOJI Electronics — Official Website]
* LIGO AIR Product Page <!-- TODO: Add URL when product page is live -->
 
=== Documents ===
{| class="wikitable"
! Document !! Version !! Last Updated !! Download
|-
| LIGO AIR Datasheet
| 1.1
| 14/10/2025
| <a href="/wiki/Special:Redirect/file/LIGO-AIR-Datasheet-V1.1.pdf" target="_blank" rel="noopener">📄 PDF</a>
|-
| LIGO AIR User Guide
| 1.2
| 04/11/2025
| <a href="/wiki/Special:Redirect/file/LIGO-AIR-User-Guide-V1.2.pdf" target="_blank" rel="noopener">📄 PDF</a>
|-
| LIGO AIR Protocol Integration
| 1.1
| 27/08/2025
| <a href="/wiki/Special:Redirect/file/LIGO-AIR-Protocol-Integration-V1.1.pdf" target="_blank" rel="noopener">📄 PDF</a>
|-
| LIGO BLE Configurator App User Guide
| —
| —
| <span style="color:#888;">Coming soon</span>
|}
 
=== Software ===
* LIGO BLE Configurator — App Store (iOS) <!-- TODO: link -->
* LIGO BLE Configurator — Google Play (Android) <!-- TODO: link -->
 
=== Compatibility ===
* LIGO AIR Adapter — Wireless signal booster for receiver side
* LIGO Pro BLE — Wired fuel level sensor with Bluetooth 5.2
 
=== Frequently Asked Questions ===
* [[Frequently Asked Questions - FAQ]]
 
== Additional Information ==
 
For Software Errata, Product Change Notifications, and End-of-Life policy, please contact SOJI Electronics support.


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''Latest documentation version: Datasheet v1.1 (14/10/2025), User Guide v1.2 (04/11/2025), Protocol Integration v1.1 (27/08/2025).''
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Revision as of 02:10, 22 May 2026

Wireless 2.4 GHz fuel sensor for diesel/gasoline tanks, designed for harsh environments (−40°C to +85°C).
SOJI Electronics
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