Bigdipper HBD4-MS1204Dip Portable High-Frequency Oil Moisture Analyzer for Crude Oil, Coal Tar, and Heavy Fuel Oil
| Brand | Bigdipper |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | OEM/ODM Producer |
| Country of Origin | China |
| Model | HBD4-MS1204Dip |
| Price Range | USD 1,400–4,200 |
| Measurement Principle | High-Frequency Capacitance Sensing (1–10 MHz) |
| Range | 0.01–100.0% w/w moisture |
| Repeatability | ±0.5% FS |
| Accuracy | ±2.0% FS |
| Response Time | <100 ms (electrical), <15 s (full system stabilization at 25 °C) |
| Sample Temp. | −40 to +85 °C |
| Max. Process Pressure | <0.3 MPa |
| Ambient Temp. | −10 to +60 °C |
| Power Supply | Rechargeable 9 V NiCd battery (HBD5), 4 h continuous operation, 1 week standby |
| Total Power Consumption | <150 mW |
| Explosion Protection | Ex d ia IIC T5 (IEC 60079-0, -1, -11) |
| Output Interface | RS232 & RS485 (STIMcom default |
| Enclosure Rating | NEMA 2 |
| Sensor Dimensions | Ø24 × 240 mm (customizable) |
| Probe Mounting | 1″ NPT or ZG1″ thread |
| Instrument Dimensions | 98 × 32 × 185 mm |
| Weight | <0.7 kg |
| Long-Term Stability | ±1% over 5 years |
| Compliance | ASTM D6304, ISO 8533, IEC 61000-6-2/6-4 (EMC), RoHS |
Overview
The Bigdipper HBD4-MS1204Dip is a portable, high-frequency capacitance-based moisture analyzer engineered for real-time, in-situ quantification of water content in hydrocarbon liquids—including crude oil, coal tar, heavy fuel oil, lubricants, transformer oil, jet fuel, and industrial solvents. Unlike Karl Fischer titration or oven-drying methods, this instrument employs a non-destructive, contact-based dielectric measurement principle operating in the 1–10 MHz band, where water molecules exhibit distinct permittivity contrast relative to non-polar matrices. The sensor detects changes in complex impedance caused by bound and free water phases, enabling direct correlation between dielectric response and volumetric or mass-based moisture concentration (0.01–100.0% w/w). Designed for deployment in dynamic field environments—railcar unloading bays, refinery inbound inspection points, offshore platform skids, and mobile lab vans—the unit delivers laboratory-grade reproducibility without sample extraction, reagents, or consumables.
Key Features
- True in-line or insertion-mode measurement: No sampling, no pre-treatment, no calibration drift from phase separation.
- Sub-second electrical response (<100 ms) with full-system stabilization under 15 seconds at ambient conditions (25 °C).
- Intrinsically safe and flameproof architecture compliant with IEC 60079-11 (Ex ia IIC T5) and UL/cUL Class I, Div 1, Groups A/B/C/D.
- Robust sensor housing fabricated from chemically inert 316 stainless steel with optimized electrode geometry to resist fouling, asphaltene adhesion, and thermal shock.
- Modular mechanical interface: Supports 1″ NPT, ZG1″ pipe thread, flange-mount, or sanitary clamp configurations for retrofit into existing piping or tank manways.
- Low-power operation enabled by ultra-low-quiescent-current analog front-end and adaptive duty-cycling firmware—max. 150 mW draw.
- Dual serial communication ports (RS232 + RS485) with configurable protocol stack: STIMcom for legacy SCADA integration or Modbus RTU for modern DCS/PLC interfacing.
- Embedded temperature compensation algorithm corrects for dielectric dispersion across −40 to +85 °C process temperatures.
- NEMA 2-rated handheld enclosure with aluminum-magnesium alloy chassis, IP54 ingress protection, and ergonomic grip for one-handed operation in PPE-gloved conditions.
Sample Compatibility & Compliance
The HBD4-MS1204Dip is validated for use with polar and semi-polar organic liquids exhibiting dielectric constants ranging from εr ≈ 2.0 (n-hexane) to εr ≈ 80 (water), including but not limited to: crude blends (API 10–45), vacuum residue, coke oven tar, delayed coker feedstocks, marine bunker fuels (ISO 8217 RMK/RMG), turbine oils (ASTM D6140), and insulating oils (IEC 60429). It complies with key industry standards governing moisture analysis in petroleum products: ASTM D6304 (coulometric KF reference method alignment), ISO 8533 (petroleum products—determination of water—capacitance method), and EN 14103 (biodiesel water content). Its intrinsic safety certification permits installation in Zone 0/1 hazardous locations per ATEX 2014/34/EU and IECEx schemes. Data integrity meets GLP audit requirements via timestamped, non-erasable internal logging (500+ records) and optional external SD card export.
Software & Data Management
The embedded firmware supports on-device data review, zero/span adjustment, and multi-point linearization using user-defined calibration curves stored in non-volatile memory. Real-time readings are displayed on a backlit monochrome LCD with dual-unit support (% w/w and ppm). All measurements include automatic metadata stamping: date/time, sensor ID, ambient temperature, and battery voltage. Through RS485, the analyzer integrates seamlessly into plant-wide Historian systems (e.g., OSIsoft PI, Emerson DeltaV) using native Modbus register mapping. Optional PC software (Windows/Linux/macOS) enables trend visualization, statistical process control (SPC) charting (X-bar R charts), and PDF report generation compliant with 21 CFR Part 11 requirements—including electronic signature fields, audit trail logs, and role-based access controls.
Applications
- Crude oil custody transfer verification at railcar discharge points prior to storage or distillation feed.
- Real-time monitoring of desalter effluent water content to optimize electrostatic coalescer performance.
- Coal tar quality control during by-product recovery in coke ovens and gasification plants.
- Heavy fuel oil (HFO) acceptance testing at power station bunkering terminals per ISO 8217 Annex B.
- In-process moisture tracking during solvent recovery loops in petrochemical separation units.
- Field screening of transformer oil moisture per IEEE C57.106 limits (≤10 ppm for new oil, ≤35 ppm for in-service).
- Mobile QA/QC for marine lubricant suppliers conducting shipboard engine oil audits.
FAQ
Does the HBD4-MS1204Dip require periodic recalibration with certified standards?
Yes—annual verification against traceable NIST-traceable water-in-oil reference materials (e.g., Conostan CRM series) is recommended. Field zero-checks using dry nitrogen purge or certified anhydrous mineral oil may be performed daily.
Can the sensor be installed in vertical or horizontal pipelines without flow conditioning?
Yes—the probe’s symmetrical electrode design ensures consistent sensitivity independent of orientation or laminar/turbulent flow regime. Minimum flow velocity is 0.1 m/s to prevent sedimentation-induced coating.
Is temperature compensation applied automatically during measurement?
Yes—integrated Pt100 RTD within the sensor body feeds real-time temperature data to the microcontroller, which applies polynomial correction based on material-specific permittivity vs. temperature coefficients.
What maintenance intervals are specified for long-term reliability?
No scheduled maintenance is required beyond visual inspection of the sensor face every 6 months. Cleaning with ASTM D4176-compliant lint-free cloth and isopropyl alcohol is sufficient if surface contamination occurs.
How is data security ensured when transmitting moisture values to cloud-based MES platforms?
All RS485 communications support hardware-level parity checking and CRC-16 error detection. When integrated via industrial gateways, TLS 1.2 encryption and certificate-based authentication can be deployed at the network layer—not within the analyzer itself—to meet ISA/IEC 62443 Level 1 requirements.
