VYMPEL Hygrovision mini Portable Hydrocarbon & Water Dew Point Analyzer

Overview

The VYMPEL Hygrovision mini is a field-deployable, battery-powered chilled-mirror dew point analyzer engineered for trace-level moisture and hydrocarbon dew point measurement in natural gas, hydrogen, and other industrial gas mixtures. It operates on the first-principle chilled-mirror method—where a polished, temperature-controlled mirror surface is cooled until condensate forms, and the corresponding thermodynamic equilibrium temperature is recorded as the dew point. This optical, direct-reading technique eliminates calibration drift and ensures long-term metrological stability without reliance on polymer sensors or spectroscopic interpolation. Designed for use in hazardous areas—including Zone 1 and Zone 2 classified environments—the instrument meets Ex db ib IIB+H2 T5 explosion protection requirements per IEC 60079-0 and IEC 60079-1, enabling safe deployment in upstream gas processing, hydrogen refueling stations, LNG terminals, and pipeline integrity monitoring.

Key Features

• Integrated chilled-mirror measurement cell with active Peltier cooling and high-stability platinum RTD temperature sensing
• Breakthrough optical imaging system: real-time visualization of condensate formation via LED-illuminated mirror surface and integrated CCD-based detection
• Auto-cleaning mirror function using pulsed thermal cycling to prevent contamination-induced measurement hysteresis
• Dual-dew-point capability: independently validated for both water dew point (WDP) and hydrocarbon dew point (HCDP) per ISO 6327, ASTM D1142, and ISO/TR 11150
• Pressure-rated sample chamber rated to 100 bar (1450 psi), compatible with high-pressure gas transmission and custody transfer applications
• Robust IP67 enclosure with externalized sensor head—ensuring any potential sample leak vents externally, eliminating internal overpressure risk
• Rechargeable lithium-ion battery pack delivering ≥12 hours of continuous operation (up to 20 h at moderate ambient conditions)
• Backlit 4-line alphanumeric LCD with tactile membrane keypad; no touchscreen to maintain reliability in gloved operation or dusty environments

Sample Compatibility & Compliance

The Hygrovision mini is validated for use with natural gas (including sour and lean variants), hydrogen (up to 100% H₂), nitrogen, argon, ethane, propane, and mixed refinery off-gases. Its chilled-mirror architecture inherently accommodates non-condensable carrier gases and avoids interference from CO₂, H₂S, or light hydrocarbons below C₅. All measurement protocols and hardware design conform to internationally recognized standards: water dew point testing complies with ISO 6327, DIN 51781, and ASTM D1142; hydrocarbon dew point assessment follows ISO/TR 11150 and ISO/TR 12148. The device supports GLP-compliant documentation through time-stamped measurement logs and user-accessible configuration history. While not FDA 21 CFR Part 11 certified out-of-the-box, audit trails and password-protected parameter settings facilitate alignment with GMP-aligned QA/QC workflows in regulated energy infrastructure projects.

Software & Data Management

Data acquisition and instrument control are managed entirely via the onboard embedded firmware—no external PC or proprietary software required. Each measurement session stores timestamped dew point values, sample pressure, flow rate, mirror temperature history, and condensation onset dynamics in non-volatile memory (≥1000 records). Export is supported via USB-C interface to standard CSV files compatible with Excel, LabVIEW, or SCADA historian systems. Firmware updates are delivered via signed binary packages and verified using SHA-256 checksums to ensure integrity. Configuration parameters—including pressure compensation coefficients, calibration offsets, and user-defined alarm thresholds—are stored with write-protection and change logging. Optional Bluetooth 5.0 module (sold separately) enables wireless telemetry to mobile field tablets running custom Android-based reporting apps compliant with ISA-95 Level 0–1 data models.

Applications

• Field verification of online moisture analyzers during commissioning, maintenance, or discrepancy investigation
• Dryness validation of pipelines, storage vessels, and compressor stations prior to commissioning or after pigging operations
• HCDP screening of natural gas prior to cryogenic processing or LNG liquefaction to prevent hydrocarbon condensation in heat exchangers
• Hydrogen quality assurance in PEM electrolyzer output streams and fueling station buffer tanks (per ISO 8573-8 and SAE J2719)
• Moisture content auditing in nitrogen blanketing systems used in petrochemical reactors and pharmaceutical inerting processes
• Regulatory compliance sampling for ISO 8573-1 Class 2/3 air quality certification in instrumentation air networks

FAQ

Does the Hygrovision mini require periodic recalibration?
No—chilled-mirror instruments operate on thermodynamic first principles and do not drift. However, annual verification against NIST-traceable dew point standards (e.g., using a two-pressure humidity generator) is recommended per ISO/IEC 17025 guidelines.

Can it measure dew point under high H₂S or CO₂ concentrations?
Yes. Unlike capacitive or aluminum oxide sensors, the optical chilled-mirror method is chemically inert and unaffected by acid gases or inert diluents, provided condensate remains optically detectable.

What is the lowest measurable dew point?
The instrument achieves −50 °C WDP under nominal conditions; sub-ambient performance may be extended to −60 °C using the built-in auxiliary cooling channel with external chiller integration.

Is training or certification required to operate the device?
Operator training is advised per ISO 8573-8 Annex B, particularly for HCDP interpretation. VYMPEL provides certified technician training modules aligned with EN 15971 and API RP 14E competency frameworks.