Intrinsically Safe Submersible Fuel Level Sensor (ATEX Certified) | L704
An intrinsically safe, ATEX-certified submersible hydrostatic level transmitter engineered for precision, real-time monitoring of diesel, gasoline, and aviation fuel within explosion-hazard environments.
The L704 Series is built to navigate the strict safety and technical demands of fuel storage facilities, generator enclosures, and petrochemical processing plants. Powered by an integrated 24-bit AD MCU micro-processor, this digital sensor processes complex hydrostatic data on-board to deliver ultra-stable, interference-free readings without manual calibration drift. Housed in a fully sealed, ruggedized casing with highly adaptable material paths (316 Stainless Steel, Titanium, or PTFE), it stands up to long-term immersion in volatile hydrocarbons and corrosive fuels.
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Explosion-Proof Certification: Certified
Exia IICT6for absolute operating safety inside hazardous zones, fuel depots, and refinery environments. -
Advanced 24-Bit Digital Core: High-speed internal MCU micro-processor handles auto-temperature compensation and digital signal filtering.
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Hydrocarbon-Resistant Casing: Fully welded barrier structure available in premium alloys to prevent chemical degradation or fuel permeation.
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Moisture Ingress Protection: Specialized ventilation cable includes a molecular sieve vent pipe to shield internal pressure elements from atmospheric humidity.
Description
Intrinsically Safe Precision for Volatile Hydrocarbons
Monitoring fluid inventory in fuel storage tanks and generator day tanks demands a sensor that eliminates ignition risks while maintaining absolute precision. The L704 Digital Fuel Level Sensor operates via high-accuracy hydrostatic pressure measurement, translating fluid depth directly into predictable industrial data loops. By embedding an advanced 24-bit analog-to-digital converter core, the internal electronics automatically isolate external signal interference and neutralize temperature-induced measurement drift.
Robust Environmental Isolation
Fuel environments frequently present ambient temperature shifts and moisture contamination risks. The L704 counteracts these factors using unique sealing protocols and a dedicated atmospheric ventilation channel. A built-in molecular sieve filter constantly blocks humidity from entering the reference tube, ensuring the internal gauge pressure mechanics remain bone-dry and precise over years of unassisted downhole deployment.
Features
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Hazardous Area Clearance: Verified explosion-proof architecture meets strict global industrial parameters for integration into oil refineries and commercial fuel depots.
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Microprocessor Signal Cleansing: Digital processing layers strip out harmonic disturbances and wave vibrations inside fuel tanks.
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Titanium & PTFE Customization: Can be configured with high-grade alternative metals or fluoropolymer baselines to safely handle aggressive chemical additives or aviation fuels.
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Atmospheric Reference Shield: Integrated molecular sieve chamber acts as an active moisture trap, preventing dew point condensation inside the reference cable.
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Zero-Point Auto-Tracking: Intellectual firmware loops execute zero-point automatic tracking adjustments, keeping calibration accurate during long seasons of immersion.
Specification
| Parameter | Technical Specification |
| Measurement Range | -1…0–0.05 Bar up to 50 Bar optional (Customized depth ranges available) |
| Safety Certification | Intrinsically Safe Exia IICT6 / CE Approved |
| Internal Processing Core | High-speed 24-bit AD MCU Micro-processor |
| Base Accuracy | ±0.5% FS standard (High-precision ±0.25% or ±0.15% FS options available) |
| Long-Term Stability | Standard: 0.1% FS ±0.05% per year (Max: 0.15% FS ±0.05% per year) |
| Casing & Sensor Material | 316 Stainless Steel standard (Titanium Alloy or PTFE optional for heavy chemical use) |
| Output Interfacing | Analog: 4–20mA, 0–5V, 0–10V / Digital: RS485 Modbus RTU, 4–20mA + HART |
| Lightning / Surge Protection | Optional customization: Air conduction up to 8000V / Cable conduction up to 4000V |
| Sampling Performance | 10 readings per second down to 1 reading per 50 minutes (Programmable) |
| Process Connection | Submersible nose-cap standard (G 1/4″ male, 1/4″ NPT male/female optional) |
| Ingress Rating | IP68 (Hermetically sealed sub-surface design) |
FAQ
Q: What makes the L704 safe for deployment in flammable fuel tanks?
A: The L704 holds an official Exia IICT6 intrinsic safety certification. This means its internal electrical circuit is specifically engineered to limit total thermal and electrical energy under all operating conditions, ensuring it cannot create an electrical spark or surface temperature high enough to ignite volatile fuel vapors.
Q: How does the internal 24-bit MCU chip improve actual fuel tracking?
A: Standard analog fuel sensors simply pass raw voltage fluctuations along, which can cause erratic readings when fluids slosh or temperatures change. The L704’s built-in 24-bit MCU samples the pressure environment at high speed, filters out vibration noise digitally, and applies real-time temperature tracking matrices to output a pristine, stable signal.
Q: Is the L704 compatible with high-sulfur diesel or bio-fuels?
A: Yes. While standard 316 stainless steel handles commercial diesel perfectly, bio-fuels and complex petrochemical mixes can contain corrosive profiles. For these installations, the L704 can be ordered with full Titanium alloy wet-parts or an all-PTFE protective configuration to ensure long-term chemical durability.
