Sensidyne IAQ-Pro Constant-Flow Air Sampling Pump
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Sensidyne IAQ-Pro |
| Instrument Type | 24-Hour Isothermal & Isokinetic Gas Sampler |
| Instrument Configuration | Dual-Channel Air Sampler |
| Flow Range | 100–600 cc/min |
| Maximum Vacuum Pressure | >26 kPa |
| Flow Stability | ≤ ±5% |
| Flowmeter Accuracy | ≥ ±2.5% |
| Service Life at Max Flow & Backpressure | ≥5000 h |
| Continuous Operation Duration at Max Flow & Max Backpressure | 2–8 h |
Overview
The Sensidyne IAQ-Pro Constant-Flow Air Sampling Pump is an engineered solution for precision environmental and occupational air sampling in compliance with international regulatory frameworks—including ISO 16000-1, ASTM D5197, US EPA Method TO-17, and China’s GB/T 18883–2002 Indoor Air Quality Standard. Designed around a closed-loop proportional feedback control system, the IAQ-Pro actively monitors and dynamically compensates for real-time changes in sampling resistance (e.g., from loaded sorbent tubes, filters, or impingers), maintaining flow within ±5% of the user-setpoint across its full operational range (100–600 cc/min). This active compensation architecture eliminates passive drift associated with fixed-orifice or diaphragm-only pumps—critical when sampling against variable backpressures up to 30 in. H₂O (≈7.47 kPa), as commonly encountered during thermal desorption tube analysis or long-duration passive badge validation.
Key Features
- True constant-flow operation via integrated pressure-sensing feedback loop and motor-speed modulation—no manual recalibration required during sampling.
- Dual independent sampling channels enable simultaneous collection on two media types (e.g., charcoal tubes + quartz fiber filters) with synchronized timing and individual flow verification.
- Programmable sampling logic: configurable start delay, multi-stage duty cycles (e.g., 30 min on / 15 min off × 8 cycles), total runtime limit, and auto-shutdown upon flow deviation >±5% or battery voltage drop below 4.2 V.
- Onboard LCD displays elapsed time, real-time flow status, low-battery warning, and fault indicators—including visual/audible alert 45 seconds prior to forced shutdown.
- Rechargeable NiCd battery pack (4.8 V, 1.8 Ah) supports ≥8 hours of continuous operation at 300 cc/min against 25 in. H₂O backpressure; rated for 300–500 charge/discharge cycles (~2.5 years typical service life).
- Compact, field-rugged housing (114 × 100 × 51 mm; 0.595 kg) with IP54-rated ingress protection and operating temperature range of 5–35 °C.
Sample Compatibility & Compliance
The IAQ-Pro interfaces seamlessly with standardized air sampling media compliant with OSHA, NIOSH, and ISO methodologies—including SKC Universal Sorbent Tubes (e.g., Carbograph™, Tenax® TA), MSA AirChek® cartridges, glass fiber filters (Whatman GF/F), and impinger-based aldehyde collection systems. Its certified flow stability meets the GB/T 18883–2002 requirement for “constant flow during sampling” and mandates pre- and post-sampling calibration using a NIST-traceable primary standard (e.g., Class I soap film meter) at five evenly spaced points across the selected flow range. Calibration data—including ambient temperature and barometric pressure—are retained in non-volatile memory to support GLP/GMP audit trails and FDA 21 CFR Part 11–compliant electronic records when paired with Sensidyne’s optional DataLink software.
Software & Data Management
When connected via RS-232 or USB-to-serial adapter, the IAQ-Pro communicates with Sensidyne’s IAQ-Manager desktop application (Windows 10/11), enabling remote configuration, real-time flow logging, automated calibration report generation, and export of CSV-formatted datasets compatible with LIMS integration. All logged parameters—including timestamped flow deviations, battery state-of-charge, and cumulative pump runtime—are digitally signed and time-stamped to satisfy ALCOA+ data integrity principles. Firmware updates preserve calibration coefficients and retain user-defined sampling protocols across reboots.
Applications
- Indoor air quality (IAQ) monitoring per GB/T 18883–2002 and ISO 16000 series—especially for VOCs (benzene, formaldehyde), CO₂, and particulate-bound PAHs.
- Occupational hygiene assessments under OSHA 29 CFR 1910.1200 and EU Directive 2004/37/EC for respirable crystalline silica, isocyanates, and metal fumes.
- Field validation of diffusion samplers and passive badges requiring active flow reference.
- Research-grade atmospheric chemistry studies involving time-resolved speciation of semi-volatile organic compounds (SVOCs) and carbonyls.
- QA/QC verification of HVAC filtration efficiency and cleanroom air change rate measurements.
FAQ
Does the IAQ-Pro require periodic factory recalibration?
No—field calibration using a primary-standard soap film meter is sufficient per GB/T 18883–2002 and ISO 16000-2. However, annual verification of pressure sensor linearity and motor response curve is recommended.
Can it operate continuously for 24 hours?
Yes—when powered by AC adapter (included); battery-only operation supports up to 8 hours at mid-range flow (300 cc/min) and typical backpressure.
Is the flowmeter traceable to NIST standards?
The internal flow sensor is factory-calibrated against NIST-traceable rotameters and verified with Class I soap film meters; certificate of conformance is supplied with each unit.
What maintenance is required?
Routine cleaning of inlet filter and periodic inspection of check valves and tubing; no user-serviceable wear parts beyond battery replacement every ~2.5 years.
How does it handle high-resistance media like PTFE membrane filters?
Its >26 kPa vacuum capability and adaptive motor control ensure stable flow delivery even at 600 cc/min against 30 in. H₂O—validated per ASTM D1072 test protocol for filter loading resistance.
