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== Protocol Integration ==
== Product Overview ==


LIGO AIR utilizes Bluetooth Low Energy (BLE) to transmit structured fuel sensor data in advertising packets at regular intervals. Data includes fuel level, battery voltage, temperature, and operation mode. For long-range applications, the LIGO AIR Adapter is recommended to boost reception.
LIGO AIR is a wireless fuel level sensor developed and manufactured by SOJI Electronics JSC. The device is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage applications.


In addition to its native protocol, LIGO AIR supports both '''Escort''' and '''Mielta''' protocols, enabling seamless protocol switching without requiring additional integration effort. Users can configure the desired protocol via the mobile application.
The sensor uses '''capacitive measurement technology''' combined with '''Bluetooth Low Energy 5.4''' wireless transmission, eliminating the need for complex wiring and reducing the risk of signal wire tampering. The heavy-duty metal housing meets the '''IP69K''' ingress protection standard, providing reliable operation against dust, moisture, vibration, and high-pressure high-temperature water cleaning typical in industrial environments.


=== Advertising Message Format ===
LIGO AIR maintains stability, durability, and operational lifespan equal to or greater than traditional wired sensors, with battery life ranging from 6 to 12 years depending on variant selected.


Structure of the '''Manufacturer data''' field in the advertising message (same for any type of peripheral unit):
== Key Features ==


'''Example Manufacturer data''': <code>0x0CFFFC0D024D0100241F000600</code>
* '''Wireless''': Bluetooth Low Energy 5.4 with directional antenna — '''1.5× range''' compared to typical market sensors
* '''Ultra-low power consumption''': '''9 µA''' working mode, '''4 µA''' storage mode
* '''Long battery life''': '''8–10 years''' standard, '''8–12 years''' extended variant
* '''High accuracy''': up to '''99.5%''' measurement accuracy (± 0.5%)
* '''Wide operating temperature''': '''-40°C to +85°C'''
* '''Long-range TX power''': up to '''19.5 dBm''' (LIGO AIR PRO variant)
* '''High capacity battery''': up to '''3600 mAh''' (PRO variant), replaceable
* '''Built-in 32 Mb EEPROM''' for data logging (90 days) and setting logs (max 500)
* '''IP69K''' ingress protection — survives dust, water jets, high-pressure cleaning
* '''Customizable length''': 700 mm to 6000 mm
* '''Built-in accelerometer''' (LIGO AIR PRO)
* '''Multi-protocol support''': SOJI, Mielta, Escort — configurable via mobile app
* '''Anti-mud oil filter''' and anti-vibration springs included
* '''Anti-tampering design''' — wireless eliminates wire cutting fraud risk
 
== Applications ==
 
* '''Heavy-duty trucks''' — long-haul transport, cargo vehicles
* '''Construction machinery''' — excavators, cement mixers, bulldozers
* '''Marine vessels''' — ships, fishing boats, offshore platforms
* '''Power generation''' — diesel generators, backup power systems
* '''Industrial fuel storage''' — stationary tanks, distribution depots
* '''Off-highway equipment''' — mining vehicles, agricultural machinery
* '''Fleet management''' — telematics-integrated fuel monitoring
 
== Product Variants / Ordering Information ==
 
=== Product Variants ===
 
The LIGO AIR series offers three variants optimized for different operational priorities:
 
{| class="wikitable" style="text-align:center;"
! Variant !! Description !! Battery Life !! Transmission Range !! Best For
|-
| '''LIGO AIR LxS''' || Standard version — cost-effective || 6–8 years || Standard || General-purpose vehicle fuel monitoring
|-
| '''LIGO AIR LxT''' || Extended-battery version || '''8–12 years''' || Standard || Long maintenance interval applications, harsh environments
|-
| '''LIGO AIR PRO''' || Long-range version — high TX power || 6–8 years || '''2× Standard''' || Marine, industrial tanks, metal-obstructed environments
|}
 
=== Part Numbers ===
 
{| class="wikitable"
! Part Number !! Length L (mm) !! Variant
|-
| LIGO-AIR-L7S      || 700 ± 3  || Standard
|-
| LIGO-AIR-L7T      || 700 ± 3  || Extended battery
|-
| LIGO-AIR-PRO-L7S  || 700 ± 3  || Extended range
|-
| LIGO-AIR-L10S      || 1000 ± 3  || Standard
|-
| LIGO-AIR-L10T      || 1000 ± 3  || Extended battery
|-
| LIGO-AIR-PRO-L10S  || 1000 ± 3  || Extended range
|-
| LIGO-AIR-L15S      || 1500 ± 3  || Standard
|-
| LIGO-AIR-L15T      || 1500 ± 3  || Extended battery
|-
| LIGO-AIR-PRO-L15S  || 1500 ± 3  || Extended range
|}
 
''Custom lengths up to '''6000 mm''' available on request.''
 
=== Ordering ===


{| class="wikitable"
{| class="wikitable"
! Sequence number of bytes !! Description !! Example
! Item !! Information
|-
| MOQ                  || 10 units
|-
| Lead time (standard) || 2–4 weeks
|-
| Lead time (custom)  || 6–8 weeks
|-
| How to order        || contact@sojielectronics.com or authorized distributors
|-
| Custom versions      || Available — contact sales for specifications
|}
 
== Technical Specifications ==
 
=== Performance ===
 
{| class="wikitable" style="text-align:center;"
! Parameter !! LIGO AIR (LxS, LxT) !! LIGO AIR PRO !! Unit
|-
| style="text-align:left;" | Measurement accuracy        || colspan="2" | ± 0.5  || %
|-
| style="text-align:left;" | Resolution                  || colspan="2" | 12    || bit
|-
| style="text-align:left;" | Sampling period            || colspan="2" | 5 to 60 || s
|-
| style="text-align:left;" | Measurement interval        || colspan="2" | 5 to 10 || s
|-
| style="text-align:left;" | Advertising interval        || 5 to 10 || 10 to 15 || s
|-
| style="text-align:left;" | Temperature measurement error || colspan="2" | ± 2 || °C
|}
 
=== Electrical ===
 
{| class="wikitable" style="text-align:center;"
! Parameter !! LIGO AIR LxS !! LIGO AIR LxT !! LIGO AIR PRO !! Unit
|-
| style="text-align:left;" | Battery type    || colspan="3" | Li-SOCl₂ (Lithium Thionyl Chloride) ||
|-
| style="text-align:left;" | Battery voltage  || colspan="3" | 3.6 || V
|-
| style="text-align:left;" | Battery capacity || 2600 || 2400 || 3600 || mAh
|-
| style="text-align:left;" | Current (working mode) || 9 || 9 || 27 || µA
|-
| style="text-align:left;" | Current (storage mode) || colspan="3" | 4 || µA
|-
| style="text-align:left;" | Battery life (expected) || 6–8 || 8–12 || 6–8 || years
|-
| style="text-align:left;" | Battery replaceable || colspan="3" | Yes ||
|}
 
=== Wireless ===
 
{| class="wikitable" style="text-align:center;"
! Parameter !! LIGO AIR !! LIGO AIR PRO
|-
|-
| 0          || Length of field || 0x0C
| style="text-align:left;" | Bluetooth protocol  || colspan="2" | Bluetooth Low Energy 5.4
|-
|-
| +1          || Type of field (Manufacturer data) || Always 0xFF
| style="text-align:left;" | Standard            || colspan="2" | IEEE 802.15.4-2006
|-
|-
| +2          || Company ID || 0x0DFC
| style="text-align:left;" | Frequency          || colspan="2" | 2.4 GHz ISM band
|-
|-
| +4          || Hardware id (type of device) || 0x02 – LIGO Air
| style="text-align:left;" | TX power max        || 6 dBm || '''19.5 dBm'''
|-
|-
| +5 and further || Payload (sensor parameters) || 0x4D0100241F000600
| style="text-align:left;" | Sensitivity        || colspan="2" | -95 dBm
|-
| style="text-align:left;" | Antenna            || colspan="2" | Directional (integrated)
|-
| style="text-align:left;" | Range              || Standard || '''2× Standard'''
|-
| style="text-align:left;" | Advertising protocols || colspan="2" | SOJI (default), Mielta, Escort
|}
|}


=== Hardware ID Mapping ===
=== Environmental ===


In order to distinguish between types of hardware, the '''hardwareid''' byte defines a set of useful parameters from the peripheral unit, their size and order.
{| class="wikitable"
! Parameter !! Value
|-
| Operating temperature  || '''-40 °C to +85 °C'''
|-
| Storage temperature    || 15 °C to 30 °C, RH < 60 % (long-term)
|-
| Humidity (operating)  || 5 % to 95 % RH non-condensing
|-
| Ingress protection    || '''IP69K''' (dust-tight + high-pressure high-temperature water jets)
|-
| Vibration resistance  || Per IEC 60068-2-6
|-
| Shock resistance      || Per IEC 60068-2-27
|-
| Service life (expected) || 10 years
|}
 
=== Memory ===


{| class="wikitable"
{| class="wikitable"
! Byte of hardwareid !! Type of hardware
! Parameter !! Value
|-
| Memory type      || 32 Mb EEPROM (built-in)
|-
|-
| 0x02 || LIGO Air
| Data log capacity || 90 days continuous storage
|-
|-
| 0x03 || LIGO Air Pro
| Setting log capacity || Max 500 logs
|}
|}


''The list of hardware may be expanded.''
== Mechanical Dimensions ==
 
[[File:LIGO-AIR-dimensions.png|thumb|center|600px|alt=LIGO AIR overall dimensions in mm|LIGO AIR overall dimensions (mm)]]
 
''All dimensions in millimeters (mm). Tolerances: ± 3 mm for length L, ± 0.5 mm for head dimensions, unless otherwise specified.''
 
=== Length Variants ===
 
{| class="wikitable"
! 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
|}


=== Payload Data Format ===
=== Mounting Pattern ===


LIGO Air and LIGO Air Pro use the same payload data format.
[[File:LIGO-AIR-drilling-pattern.png|thumb|center|500px|alt=Mounting hole pattern|Mounting hole pattern]]


{| class="wikitable"
{| class="wikitable"
! Sequence number of bytes !! Parameter type !! Parameter length (bytes) !! Range !! Unit of measurement
! Item !! Specification
|-
|-
| 0  || Fuel level || 2 || 0 to 1023 (option) / 0 to 4095 (default) / Liter: 0 to 65535 (option) || Arbitrary units
| Central hole            || Ø 42 mm (for probe)
|-
|-
| +2 || Reserved || 1 || NA || NA
| Mounting holes          || 4 × Ø 7 mm
|-
|-
| +3 || Built-in battery voltage || 1 || 0 to 255 || Volt × 10
| Mounting hole spacing    || 70.5 × 70.5 mm
|-
|-
| +4 || Temperature || 1 || -128 to 127 || Celsius degrees
| Recommended fastener (≤3 mm wall) || M5 rivet nut
|-
|-
| +5 || Reserved || 1 || NA || NA
| Recommended fastener (>3 mm wall) || M4.8 self-tapping screw
|}
 
== Compliance and Certifications ==
 
=== Wireless / Radio ===
 
{| class="wikitable"
! Region !! Standard !! Status
|-
|-
| +6 || Firmware version || 1 || 0 to 255 || Version number
| EU      || RED 2014/53/EU, EMC 2014/30/EU || ✓ Compliant
|-
|-
| +7 || Operation Mode || 1 || 0 and 1 || 0: Working Mode, 1: Storage Mode
| US      || FCC Part 15.247 || ✓ Compliant
|-
| Canada  || ISED RSS-247, RSS-Gen, ICES-003 || ✓ Compliant
|-
| UK      || UKCA, UK RED || ✓ Compliant
|-
| Japan    || MIC (Telec) || ''(pending)''
|}
|}


=== Example Payload Decoding ===
=== Environmental ===


'''Example Payload data''': <code>0x4D0100241F000600</code>
{| class="wikitable"
! Standard !! Status
|-
| RoHS 3 (2011/65/EU + 2015/863) || ✓ Compliant
|-
| REACH (EC 1907/2006)          || ✓ Compliant
|-
| WEEE (2012/19/EU)              || ✓ Registered
|-
| Battery WEEE (2006/66/EC)      || ✓ Registered (Li-SOCl₂ battery)
|}
 
=== Mechanical / Safety ===


{| class="wikitable"
{| class="wikitable"
! Bytes !! 4D01 !! NA !! 24 !! 1F !! NA !! 06 !! 00
! Standard !! Rating
|-
| IEC 60529 (Ingress Protection)  || '''IP69K'''
|-
|-
! Field
| IEC 60068-2-6 (Vibration)        || Compliant
| Fuel level || Reserved || Battery voltage || Temperature || Reserved || Firmware version || Operation Mode
|-
|-
! Little-endian (hex)
| IEC 60068-2-27 (Mechanical shock) || Compliant
| 014D || NA || 24 || 1F || NA || 06 || 00
|-
| UN 38.3 (Battery transportation)  || ✓ Compliant
|}
 
=== Industry-Specific ===
 
{| class="wikitable"
! Membership / Standard !! Status
|-
|-
! Decimal
| Bluetooth SIG          || ✓ Adopter Member
| 333 || NA || 36 || 31 || NA || 006 || 0
|-
|-
! Value
| Bluetooth Qualification || ✓ Qualified — see [[LIGO Air Memberships]]
| 333 (unit or liter) || NA || 3.6 Volt || 31 °C || NA || 0.0.6 || Working mode
|}
|}


[[File:LIGO-AIR-payload-example.png|thumb|600px|center|Payload data decoding example]]
=== Warranty ===
 
* '''Warranty period''': '''3 years''' from date of shipment
* '''NOT covered''': Battery
* '''Warranty void if''': Operating conditions exceed specifications, unauthorized modification, or improper installation


== Security Recommendations ==
''For detailed certification documents and approval IDs, see [[LIGO Air Certification & Approvals]].''


* Change the default password provided by the manufacturer immediately after first connection to prevent unauthorized access
<div class="noprint">
* Verify the sensor's MAC address against the manufacturer's QR code label to confirm device authenticity
== Related Documents ==
* Restrict app installation to authorized technicians only
 
* [[LIGO AIR]] — Product overview
* [[LIGO AIR User Guide]] — Detailed BLE User Guide
* [[LIGO AIR Certification & Approvals]] — Full certification list
* [[Frequently Asked Questions - FAQ]] — Common questions


== Revision History ==
== Revision History ==


{| class="wikitable"
{| class="wikitable"
! Date !! Document !! Version !! Description
! Date !! Version !! Description
|-
| 18/06/2025 || 1.0  || Initial release
|-
|-
| 18/06/2025 || Protocol Integration || 1.0   || Initial Release
| 14/07/2025 || 1.0.3 || Minor corrections to specifications
|-
|-
| 27/08/2025 || Protocol Integration || 1.1  || Minor changes
| 14/10/2025 || 1.1  || Added LIGO AIR PRO variant and extended battery variants (LxT)
|}
|}
</dev>


----


''© 2025 SOJI Electronics JSC. All Rights Reserved.'' 
''Specifications subject to change without notice. Contact SOJI Electronics for the latest information.''


[[Category:LIGO Air]]
[[Category:LIGO AIR]]

Latest revision as of 06:39, 21 May 2026

Product Overview

LIGO AIR is a wireless fuel level sensor developed and manufactured by SOJI Electronics JSC. The device is designed to measure the level of liquid fuel and other non-conductive liquids in vehicle tanks and stationary fuel storage applications.

The sensor uses capacitive measurement technology combined with Bluetooth Low Energy 5.4 wireless transmission, eliminating the need for complex wiring and reducing the risk of signal wire tampering. The heavy-duty metal housing meets the IP69K ingress protection standard, providing reliable operation against dust, moisture, vibration, and high-pressure high-temperature water cleaning typical in industrial environments.

LIGO AIR maintains stability, durability, and operational lifespan equal to or greater than traditional wired sensors, with battery life ranging from 6 to 12 years depending on variant selected.

Key Features

  • Wireless: Bluetooth Low Energy 5.4 with directional antenna — 1.5× range compared to typical market sensors
  • Ultra-low power consumption: 9 µA working mode, 4 µA storage mode
  • Long battery life: 8–10 years standard, 8–12 years extended variant
  • High accuracy: up to 99.5% measurement accuracy (± 0.5%)
  • Wide operating temperature: -40°C to +85°C
  • Long-range TX power: up to 19.5 dBm (LIGO AIR PRO variant)
  • High capacity battery: up to 3600 mAh (PRO variant), replaceable
  • Built-in 32 Mb EEPROM for data logging (90 days) and setting logs (max 500)
  • IP69K ingress protection — survives dust, water jets, high-pressure cleaning
  • Customizable length: 700 mm to 6000 mm
  • Built-in accelerometer (LIGO AIR PRO)
  • Multi-protocol support: SOJI, Mielta, Escort — configurable via mobile app
  • Anti-mud oil filter and anti-vibration springs included
  • Anti-tampering design — wireless eliminates wire cutting fraud risk

Applications

  • Heavy-duty trucks — long-haul transport, cargo vehicles
  • Construction machinery — excavators, cement mixers, bulldozers
  • Marine vessels — ships, fishing boats, offshore platforms
  • Power generation — diesel generators, backup power systems
  • Industrial fuel storage — stationary tanks, distribution depots
  • Off-highway equipment — mining vehicles, agricultural machinery
  • Fleet management — telematics-integrated fuel monitoring

Product Variants / Ordering Information

Product Variants

The LIGO AIR series offers three variants optimized for different operational priorities:

Variant Description Battery Life Transmission Range Best For
LIGO AIR LxS Standard version — cost-effective 6–8 years Standard General-purpose vehicle fuel monitoring
LIGO AIR LxT Extended-battery version 8–12 years Standard Long maintenance interval applications, harsh environments
LIGO AIR PRO Long-range version — high TX power 6–8 years 2× Standard Marine, industrial tanks, metal-obstructed environments

Part Numbers

Part Number Length L (mm) Variant
LIGO-AIR-L7S 700 ± 3 Standard
LIGO-AIR-L7T 700 ± 3 Extended battery
LIGO-AIR-PRO-L7S 700 ± 3 Extended range
LIGO-AIR-L10S 1000 ± 3 Standard
LIGO-AIR-L10T 1000 ± 3 Extended battery
LIGO-AIR-PRO-L10S 1000 ± 3 Extended range
LIGO-AIR-L15S 1500 ± 3 Standard
LIGO-AIR-L15T 1500 ± 3 Extended battery
LIGO-AIR-PRO-L15S 1500 ± 3 Extended range

Custom lengths up to 6000 mm available on request.

Ordering

Item Information
MOQ 10 units
Lead time (standard) 2–4 weeks
Lead time (custom) 6–8 weeks
How to order contact@sojielectronics.com or authorized distributors
Custom versions Available — contact sales for specifications

Technical Specifications

Performance

Parameter LIGO AIR (LxS, LxT) LIGO AIR PRO Unit
Measurement accuracy ± 0.5 %
Resolution 12 bit
Sampling period 5 to 60 s
Measurement interval 5 to 10 s
Advertising interval 5 to 10 10 to 15 s
Temperature measurement error ± 2 °C

Electrical

Parameter LIGO AIR LxS LIGO AIR LxT LIGO AIR PRO Unit
Battery type Li-SOCl₂ (Lithium Thionyl Chloride)
Battery voltage 3.6 V
Battery capacity 2600 2400 3600 mAh
Current (working mode) 9 9 27 µA
Current (storage mode) 4 µA
Battery life (expected) 6–8 8–12 6–8 years
Battery replaceable Yes

Wireless

Parameter LIGO AIR LIGO AIR PRO
Bluetooth protocol Bluetooth Low Energy 5.4
Standard IEEE 802.15.4-2006
Frequency 2.4 GHz ISM band
TX power max 6 dBm 19.5 dBm
Sensitivity -95 dBm
Antenna Directional (integrated)
Range Standard 2× Standard
Advertising protocols SOJI (default), Mielta, Escort

Environmental

Parameter Value
Operating temperature -40 °C to +85 °C
Storage temperature 15 °C to 30 °C, RH < 60 % (long-term)
Humidity (operating) 5 % to 95 % RH non-condensing
Ingress protection IP69K (dust-tight + high-pressure high-temperature water jets)
Vibration resistance Per IEC 60068-2-6
Shock resistance Per IEC 60068-2-27
Service life (expected) 10 years

Memory

Parameter Value
Memory type 32 Mb EEPROM (built-in)
Data log capacity 90 days continuous storage
Setting log capacity Max 500 logs

Mechanical Dimensions

LIGO AIR overall dimensions in mm
LIGO AIR overall dimensions (mm)

All dimensions in millimeters (mm). Tolerances: ± 3 mm for length L, ± 0.5 mm for head dimensions, unless otherwise specified.

Length Variants

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

Mounting Pattern

Mounting hole pattern
Mounting hole pattern
Item Specification
Central hole Ø 42 mm (for probe)
Mounting holes 4 × Ø 7 mm
Mounting hole spacing 70.5 × 70.5 mm
Recommended fastener (≤3 mm wall) M5 rivet nut
Recommended fastener (>3 mm wall) M4.8 self-tapping screw

Compliance and Certifications

Wireless / Radio

Region Standard Status
EU RED 2014/53/EU, EMC 2014/30/EU ✓ Compliant
US FCC Part 15.247 ✓ Compliant
Canada ISED RSS-247, RSS-Gen, ICES-003 ✓ Compliant
UK UKCA, UK RED ✓ Compliant
Japan MIC (Telec) (pending)

Environmental

Standard Status
RoHS 3 (2011/65/EU + 2015/863) ✓ Compliant
REACH (EC 1907/2006) ✓ Compliant
WEEE (2012/19/EU) ✓ Registered
Battery WEEE (2006/66/EC) ✓ Registered (Li-SOCl₂ battery)

Mechanical / Safety

Standard Rating
IEC 60529 (Ingress Protection) IP69K
IEC 60068-2-6 (Vibration) Compliant
IEC 60068-2-27 (Mechanical shock) Compliant
UN 38.3 (Battery transportation) ✓ Compliant

Industry-Specific

Membership / Standard Status
Bluetooth SIG ✓ Adopter Member
Bluetooth Qualification ✓ Qualified — see LIGO Air Memberships

Warranty

  • Warranty period: 3 years from date of shipment
  • NOT covered: Battery
  • Warranty void if: Operating conditions exceed specifications, unauthorized modification, or improper installation

For detailed certification documents and approval IDs, see LIGO Air Certification & Approvals.

Revision History

Date Version Description
18/06/2025 1.0 Initial release
14/07/2025 1.0.3 Minor corrections to specifications
14/10/2025 1.1 Added LIGO AIR PRO variant and extended battery variants (LxT)

</dev>

© 2025 SOJI Electronics JSC. All Rights Reserved. Specifications subject to change without notice. Contact SOJI Electronics for the latest information.

SOJI Electronics
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