Junray ZR-3620C Portable Low-Flow Air Sampling Pump

Overview

The Junray ZR-3620C Portable Low-Flow Air Sampling Pump is a precision-engineered instrument designed for quantitative collection of airborne particulate and gaseous contaminants in occupational and ambient environments. It operates on the principle of controlled volumetric aspiration: an integrated brush-type diaphragm vacuum pump draws air through a selected sampling medium—such as a filter membrane, sorbent tube, or impinger—at a user-defined and electronically stabilized flow rate. The system employs closed-loop digital mass flow control, leveraging real-time feedback from a high-accuracy electronic flow sensor to maintain setpoint fidelity across variable backpressures up to 130 kPa. This ensures traceable, repeatable sample volumes under field conditions where line voltage fluctuations, temperature gradients, and media resistance commonly challenge conventional analog pumps.

Key Features

• Digital Constant-Flow Control: Proprietary algorithm-driven feedback loop maintains flow stability within ±2.5% across the full 1.0–5.0 L/min range—even when sampling through high-resistance media such as multi-bed sorbent tubes or dense PTFE filters.
• High-Load Vacuum Capability: Engineered with a premium imported brushed diaphragm pump delivering sustained vacuum up to 130 kPa, enabling reliable operation with packed-bed adsorbents (e.g., Tenax TA, Carbopack B) and glass fiber filters under real-world loading conditions.
• Integrated Environmental Metrology: Onboard sensors continuously measure ambient temperature, barometric pressure, pre-flow temperature, and pre-flow pressure—automatically calculating standardized reference volume (e.g., 25°C, 101.3 kPa) per ISO 10780 and EPA Method TO-17 protocols.
• Flexible Sampling Modes: Supports instant start, programmable timed cycles (up to 99h59m), and precise volume-triggered termination (0.1–999.9 L), eliminating manual stopwatch dependency and reducing operator error.
• Field-Optimized Portability: Compact form factor (≤240 × 120 × 180 mm), lightweight construction (<1.8 kg), and ergonomic grip facilitate extended belt-worn or tripod-mounted deployment during personal exposure monitoring or area surveys.
• Robust Power Management: Rechargeable lithium-ion battery delivers >10 hours of continuous operation at 2.0 L/min against 3 kPa system resistance—validated per IEC 62133 and compatible with universal 5 V/2 A USB-C charging.

Sample Compatibility & Compliance

The ZR-3620C is validated for use with standardized sampling configurations defined in major regulatory frameworks. It accommodates 37 mm and 47 mm diameter filter cassettes (NIOSH Method 0500), 60–150 mm length charcoal tubes (NIOSH Method 1501), silica gel tubes (OSHA Method 42), and aqueous impingers (EPA Method IO-4). Its flow accuracy and stability meet the performance criteria specified in HJ/T 375–2007 (Environmental Air Samplers), JJG 956–2013 (Verification Regulation for Atmospheric Samplers), and GB/T 17061–1997 (Technical Specifications for Workplace Air Sampling Instruments). While not intrinsically safe, it is suitable for non-hazardous area use in accordance with IEC 61000-6-3 (EMC immunity) and IEC 61000-6-4 (EMC emissions).

Software & Data Management

Data logging is performed internally with timestamped records of flow rate, accumulated volume, environmental parameters, and operational status—stored in non-volatile memory with capacity for ≥10,000 sample events. Export is supported via USB-C interface using Junray’s certified PC utility (Windows 10/11), which generates audit-ready CSV reports compliant with GLP documentation requirements. The software enforces user authentication, session logging, and immutable record timestamps—supporting traceability in QA/QC workflows aligned with ISO/IEC 17025 and FDA 21 CFR Part 11 principles (electronic signature readiness upon optional configuration).

Applications

• Occupational hygiene monitoring of respirable dust (PM₄, PM₁₀), metal fumes (e.g., Cr(VI), Pb), and organic vapors (e.g., benzene, formaldehyde) per NIOSH and OSHA methodologies.
• Ambient air quality assessment for VOCs, SVOCs, and semi-volatiles in urban, industrial, and indoor environments (e.g., schools, offices, hospitals).
• Indoor air quality (IAQ) investigations including mold spore collection, formaldehyde screening, and total volatile organic compound (TVOC) profiling.
• Research-grade sampling for method development, inter-laboratory comparison studies, and validation of new sorbent materials or filter media.
• Compliance verification for LEED IEQ credit documentation and ISO 16000-series indoor air testing protocols.

FAQ

Does the ZR-3620C support calibration traceable to national standards?
Yes—flow calibration is performed using a NIST-traceable primary standard (e.g., dry calibrator or bubble meter) and documented per JJG 956–2013; factory calibration certificates include uncertainty budgets.

Can the pump operate while charging?
No—battery charging and sampling are mutually exclusive to ensure measurement integrity and thermal safety; however, hot-swap battery kits are available as optional accessories.

Is firmware upgrade capability provided?
Yes—field-upgradable firmware supports evolving regulatory requirements and adds functionality such as custom sampling profiles or enhanced data export formats.

What maintenance intervals are recommended?
Pump head inspection and diaphragm replacement every 5,000 operating hours or biannually—whichever occurs first—as outlined in the maintenance logbook supplied with each unit.

Are spare parts and consumables available globally?
Junray maintains authorized distribution partners in North America, EU, and APAC regions; critical spares (pump modules, flow sensors, battery packs) are stocked with ≤5 business day lead time under standard terms.