HY-400 Integrated Constant-Temperature Preconditioner
| Brand | Huayun Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | China |
| Model | HY-400 |
| Price | USD 5,600 (FOB Beijing) |
Overview
The HY-400 Integrated Constant-Temperature Preconditioner is an engineered solution for precise sample gas stream conditioning in analytical and process monitoring applications. Designed for laboratories and industrial facilities requiring stable, dew-point-controlled inlet gas conditions—particularly for moisture-sensitive instruments such as FTIR gas analyzers, paramagnetic O₂ sensors, chemiluminescent NOₓ analyzers, and laser-based trace gas monitors—the HY-400 employs a unified thermal management architecture to simultaneously achieve precooling, deep cooling (cryo-concentration), fine particulate filtration, coalescing water removal, and precise temperature stabilization. Unlike conventional multi-component conditioning systems with discrete chillers, filters, and heaters connected via compression fittings or tubing, the HY-400 integrates all functional stages into a single monolithic flow path with zero external tube connections—eliminating leak paths, dead volumes, and adsorption surfaces that compromise response time and measurement fidelity. Its core thermal strategy combines staged refrigeration (Peltier-based primary cooling followed by high-efficiency condensation surface geometry) with active thermal regulation to maintain setpoint stability within ±0.3 °C across ambient fluctuations from 5 °C to 40 °C.
Key Features
- Zero-fitting integrated flow path: All internal gas passages are machined directly into thermally conductive aluminum housing—no elastomeric seals, compression ferrules, or polymer tubing exposed to sample stream.
- Multi-stage thermal conditioning: First-stage Peltier cooling (−10 °C to +15 °C range) followed by optimized condensation surface geometry for efficient water vapor capture and phase separation.
- Coalescing separator with stainless-steel sintered filter (0.5 µm absolute rating) and hydrophobic membrane for liquid droplet removal and aerosol retention.
- Active temperature control loop with PID-regulated heater and high-resolution RTD feedback (±0.1 °C accuracy) ensuring constant outlet temperature regardless of inlet humidity or flow rate variation (1–10 L/min).
- Compact footprint (280 × 190 × 145 mm) and low power consumption (<120 W typical), suitable for benchtop deployment or integration into OEM analyzer enclosures.
Sample Compatibility & Compliance
The HY-400 is compatible with non-corrosive, non-condensable gases including ambient air, N₂, O₂, CO₂, CH₄, and synthetic calibration mixtures up to 100 kPa absolute pressure. It is not rated for H₂S, Cl₂, NH₃, or highly reactive halogenated compounds. Gas stream particulate loading must remain below 10 mg/m³ to ensure long-term filter integrity. The unit complies with IEC 61000-6-3 (EMC emission standards) and IEC 61000-6-2 (immunity). Its design supports GLP/GMP-aligned operation: all firmware logs timestamped thermal setpoints, actual outlet temperature, and cumulative operating hours; audit trail export is available via USB-C interface. While not certified to ISO 8573-1 Class 2 for compressed air purity, it routinely achieves Class 3–4 equivalent performance (dew point ≤ −20 °C at 1 bar, particle ≤ 0.5 µm, oil content < 0.01 mg/m³) under nominal conditions.
Software & Data Management
The HY-400 operates in standalone mode with front-panel LED display and rotary encoder control. Optional RS-485 Modbus RTU interface enables integration into SCADA or LabVIEW-based DAQ systems for remote setpoint adjustment, real-time temperature telemetry, and alarm status reporting (e.g., high dew point, filter clogging warning). Firmware version 2.1+ supports configurable logging intervals (1 s to 10 min) and stores up to 30 days of operational history internally. Data export is performed via FAT32-formatted USB flash drive—no proprietary software required. All configuration changes are recorded with user ID (if enabled), timestamp, and parameter delta, satisfying basic FDA 21 CFR Part 11 requirements for electronic record integrity when deployed in regulated environments.
Applications
- Preconditioning of ambient air samples prior to introduction into continuous emissions monitoring systems (CEMS) complying with EPA Method 7E and EN 15267-3.
- Stabilizing inlet gas temperature and humidity for cavity ring-down spectroscopy (CRDS) and off-axis ICOS analyzers where thermal drift induces spectral baseline instability.
- Protecting electrochemical gas sensors from condensation-induced electrolyte dilution and membrane saturation.
- Providing consistent sample conditions for ASTM D6216-compliant opacity monitor calibration and verification procedures.
- OEM integration into portable VOC screening platforms requiring ruggedized, low-maintenance gas conditioning without external chillers or desiccant cartridges.
FAQ
What is the maximum allowable inlet gas temperature and humidity?
Inlet gas must not exceed 50 °C dry-bulb temperature and 95% RH at 1 bar absolute. Higher humidity may saturate the coalescer prematurely.
Can the HY-400 be used with corrosive gases?
No. Internal wetted materials include anodized aluminum, 316 stainless steel, PTFE, and FKM elastomers—suitable only for inert or mildly acidic gases. HCl, SO₂, or NO₂ require custom material upgrades and are not covered under standard warranty.
Is the unit suitable for use in explosion-hazardous areas?
Not intrinsically safe. It carries no ATEX, IECEx, or UL HazLoc certification. Installation in classified zones requires external purging or pressurization per NEC Article 500.
How often does the filter require replacement?
Under typical ambient air sampling (urban background), replace the coalescing filter every 6 months or after 2,000 operating hours—whichever occurs first. Filter life decreases significantly in high-particulate or coastal salt-laden environments.
Does the HY-400 support dual-setpoint operation (e.g., different temperatures for day/night cycles)?
Yes. Up to four programmable temperature profiles can be scheduled via Modbus register write; each profile includes start time, setpoint, and duration. Local panel programming supports only single-setpoint operation.
