HengaoDe YH-TWA-300HP Programmable Low-Flow Air Sampler
| Brand | HengaoDe |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | YH-TWA-300HP |
| Price | USD 42.50 (FOB) |
| Pump Pressure | >13,000 Pa |
| Flow Range | 20–500 mL/min |
| Flow Accuracy | ±5% FS |
| Flow Stability | ≤5% |
| Timer Accuracy | ≤±0.1% |
| Operating Temperature | −25 to +45 °C |
| Power Supply | AC 220 V ±10 V / 50 Hz or Built-in Ni-MH Rechargeable Battery |
| Continuous Operation | ≥12 h |
| Weight | ≤0.5 kg |
| Dimensions | 100 × 50 × 110 mm |
Overview
The HengaoDe YH-TWA-300HP is a programmable low-flow air sampler engineered for precision environmental and occupational hygiene monitoring. It operates on the principle of controlled volumetric aspiration using a calibrated diaphragm pump, enabling accurate collection of airborne contaminants—including organic vapors, inorganic gases, and particulate-bound analytes—onto solid sorbent tubes (e.g., activated carbon, silica gel) or liquid absorption media. Designed to meet international sampling protocols, it supports both time-weighted average (TWA) and short-term exposure limit (STEL) monitoring per OSHA, NIOSH, and ISO 16000-1 methodologies. Its compact, portable architecture and integrated battery allow unattended 8-hour TWA sampling in field or personal monitoring configurations, while its anti-backflow protection safeguards internal components during high-resistance sampling scenarios.
Key Features
- Programmable sampling timer with up to 8-hour automatic TWA sequence execution, eliminating manual intervention
- High-efficiency imported diaphragm pump delivering stable flow across full 20–500 mL/min range with <5% stability deviation
- Dual-power operation: AC mains input (220 V ±10 V, 50 Hz) and rechargeable Ni-MH battery supporting ≥12 h continuous runtime
- Integrated backflow prevention mechanism protecting pump integrity when sampling high-resistance media or under condensation risk
- Ergonomic, lightweight chassis (≤0.5 kg) with dimensions optimized for belt-mounting, tripod use, or handheld deployment
- Universal sorbent tube adapter compatible with standard 6-mm and 9-mm glass tubes per ASTM D3960 and ISO 16017-1
Sample Compatibility & Compliance
The YH-TWA-300HP is validated for use with EPA TO-17, NIOSH 1501/1502, and ISO 16017-1 compliant sampling media. It accommodates both passive and active sampling configurations, including charcoal tubes for benzene, xylene, and formaldehyde; silica gel tubes for aldehydes and amines; and impingers for acid gases (e.g., HCl, SO₂). The instrument’s flow accuracy (±5% FS) and pressure capability (>13,000 Pa) ensure adherence to method-defined flow tolerances under variable backpressure conditions. All electrical components comply with IEC 61010-1 safety standards for laboratory and field instrumentation. No proprietary consumables are required—standardized tubing, connectors, and calibration syringes are fully interoperable.
Software & Data Management
While the YH-TWA-300HP operates as a standalone hardware controller without embedded firmware-based data logging, it is fully compatible with external calibration and audit workflows mandated under GLP and ISO/IEC 17025. Users may record start/stop times, flow verification logs, and tube lot numbers via paper-based or LIMS-integrated electronic forms. Its timer accuracy (≤±0.1%) satisfies traceability requirements for TWA calculations in regulatory submissions. For laboratories operating under FDA 21 CFR Part 11, time-stamped calibration certificates and pump performance verification records—generated using NIST-traceable primary standards—constitute the auditable data trail. Optional flow calibrators (e.g., DryCal DC-Lite) integrate seamlessly for routine field verification.
Applications
This sampler serves critical roles in industrial hygiene (IH) assessments, indoor air quality (IAQ) surveys, ambient air monitoring networks, and research-grade exposure science. Typical applications include: quantification of volatile organic compounds (VOCs) in manufacturing facilities; monitoring of welding fumes and metal oxides in fabrication shops; assessment of solvent exposure in printing and coating operations; and baseline characterization of formaldehyde and acetaldehyde in residential and commercial buildings. Its low-flow design minimizes breakthrough risk for high-affinity analytes on sorbent media, making it especially suitable for long-duration (up to 24 h) integrated sampling where mass loading must remain within linear adsorption capacity limits.
FAQ
Is the YH-TWA-300HP suitable for NIOSH-certified methods?
Yes—it meets flow accuracy, stability, and timer precision requirements for NIOSH Methods 1501, 1502, and 2541 when operated within specified flow ranges and verified with primary standards.
Can it be used for personal sampling?
Absolutely—the device’s weight (12 h), and belt-mount compatibility make it ideal for worker-worn TWA monitoring per OSHA Z-1 and ACGIH TLV guidelines.
Does it require annual recalibration?
Per ISO/IEC 17025, flow verification using a NIST-traceable calibrator is recommended before each sampling campaign or at least daily in high-use environments.
What maintenance is required?
Routine inspection of inlet filters, tubing integrity, and battery charge cycle health is advised; pump diaphragms should be replaced every 12–18 months under continuous use.
Is it compatible with thermal desorption systems?
Yes—its standardized 6-mm and 9-mm tube interfaces align with common autosampler trays used in ATD-GC/MS platforms from brands including Gerstel, Markes, and PerkinElmer.
