JiDa Xiaotian’e GDYK-160L / GDYK-160H Portable Atmospheric Air Sampler

Overview

The JiDa Xiaotian’e GDYK-160L and GDYK-160H are precision-engineered portable atmospheric air samplers designed for regulatory-compliant environmental monitoring and indoor air quality (IAQ) assessment. These single-channel samplers operate on volumetric displacement principles, utilizing calibrated positive-displacement diaphragm pumps and integrated thermal mass flow sensing to deliver stable, traceable airflow under variable ambient conditions. Engineered to align with the sampling methodology requirements of GB/T 18883–2022 (Indoor Air Quality Standard), they support passive collection of gaseous pollutants—including formaldehyde, benzene, TVOC, SO₂, NO₂, and ozone—into absorbent solutions (e.g., DNPH cartridges, alkaline absorption tubes) or onto solid sorbent media (e.g., Tenax TA, Carbopack). Their compact, field-deployable architecture enables routine use in government environmental protection agencies, CMA-accredited third-party testing laboratories, IAQ service providers, and building material certification facilities.

Key Features

• Two configurable models: GDYK-160L for low-flow applications (0–0.5 L/min), optimized for extended-duration sampling of reactive species; GDYK-160H for higher-volume collection (0–1.0 L/min), suitable for rapid screening and particulate-bound gas capture.
• High-stability flow control system featuring a factory-calibrated, temperature-compensated flowmeter with ±3% full-scale accuracy and ≤5% short-term variability—verified per JJG 956–2017 (Chinese National Metrological Verification Regulation for Air Samplers).
• Custom-engineered diaphragm pump using imported, anti-aging nitrile rubber membranes, rated for ≥50,000 operating hours (8–10 years typical service life under standard duty cycles).
• Integrated temperature and pressure sensors mounted directly within the main airflow path—ensuring real-time correction of sampled volume to standard reference conditions (25 °C, 101.325 kPa) without post-processing interpolation.
• Sunlight-readable high-density dot-matrix LCD display with ultra-low power consumption (<1.2 W during operation), enabling clear parameter visibility in outdoor field conditions without backlight dependency.
• Modular mechanical design with proprietary tooling—eliminating generic chassis constraints—optimized for thermal dissipation, pump alignment, and absorption tube port ergonomics. All structural components undergo vibration, drop, and thermal cycling validation per IEC 60068-2 series.

Sample Compatibility & Compliance

The GDYK-160 series is validated for compatibility with standard U.S. EPA, ISO, and Chinese national method-compatible sampling media, including 5–50 mL bubble absorption tubes (e.g., 10 mL impingers for SO₂, 25 mL for HCHO), 37 mm/47 mm PTFE membrane filters, and packed sorbent tubes (e.g., SKC Ultra, Anasorb CSC). Its flow performance meets the operational criteria defined in GB/T 18883–2022 Annex B (formaldehyde), Annex C (benzene/toluene/xylene), and Annex D (TVOC), as well as ASTM D1357 (Standard Practice for Sampling Air for Particulate Matter) when used with appropriate inlet conditioners. Each unit ships with a calibration certificate traceable to CNAS-accredited metrology institutes (Certificate No. prefixed CNAS-Lxxx), fulfilling documentation requirements for GLP-aligned environmental testing workflows.

Software & Data Management

While the GDYK-160L/H operates as a standalone hardware platform without embedded Wi-Fi or cloud connectivity, it supports full auditability through its non-volatile timer memory and dual-mode data logging. All sampling sessions—including start/stop timestamps, preset flow rate, actual measured flow (averaged over 10-s intervals), accumulated volume, ambient T/P readings, and battery voltage—are stored locally with 1,000-event capacity. Export is facilitated via USB-C interface using vendor-provided PC software compliant with Windows 10/11 x64. The software generates ISO/IEC 17025-compliant reports with digital signatures, automatic uncertainty propagation (based on flowmeter error budget and timer drift), and optional CSV export for integration into LIMS platforms. Audit trails adhere to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) and satisfy basic FDA 21 CFR Part 11 readiness when deployed with controlled user access protocols.

Applications

• Regulatory compliance monitoring for municipal EPBs conducting routine ambient air surveillance at fixed-site stations and mobile patrol units.
• Indoor air quality assessments in residential, commercial, and educational buildings—particularly pre-occupancy verification following renovation or furniture installation.
• Method validation and proficiency testing in CMA-certified laboratories performing GB/T 18883–2022, HJ 583–2010 (ambient benzene), and HJ 479–2018 (NO₂) analyses.
• Product emission testing by manufacturers of adhesives, paints, flooring, and composite wood panels seeking CE marking or China Compulsory Certification (CCC) documentation.
• Academic research in atmospheric chemistry requiring reproducible low-flow sampling for speciated VOC analysis via GC-MS or HPLC-UV.

FAQ

Is the GDYK-160 series compatible with U.S. EPA Method TO-17?
Yes—when paired with appropriate sorbent tubes (e.g., Carbograph 1TD or Tenax GR) and operated within its 0.05–0.5 L/min range, the GDYK-160L satisfies the flow rate and stability requirements outlined in TO-17 Section 6.2.
Does the instrument provide real-time flow compensation for temperature and pressure changes?
Yes—the integrated T/P sensor is positioned in-line with the sample stream, and all displayed and logged volumes are automatically corrected to standard conditions (25 °C, 101.325 kPa) using the ideal gas law.
What is the calibration interval recommendation?
Per JJG 956–2017, initial calibration is required prior to first use; subsequent recalibration is recommended every 6 months or after 500 operating hours—whichever occurs first.
Can the device be powered externally during continuous operation?
Yes—it accepts 12 V DC input via the rear panel terminal block, enabling uninterrupted operation from external power supplies or vehicle batteries without depleting internal Li-ion cells.
Are spare parts and certified replacement flowmeters available internationally?
Yes—original equipment manufacturer (OEM) flow sensors, pump modules, and absorption tube holders are supplied with NIST-traceable calibration documentation and comply with RoHS 3 and REACH Annex XIV substance restrictions.