HUANKONG GHK-7201 Integrated Pressure and Flow Calibrator
| Brand | HUANKONG |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | OEM Manufacturer |
| Country of Origin | China |
| Model | GHK-7201 |
| Pricing | Upon Request |
Overview
The HUANKONG GHK-7201 Integrated Pressure and Flow Calibrator is a field-deployable, multi-function metrological instrument engineered for high-accuracy calibration and verification of flow measurement systems used in environmental monitoring, stack emission testing, and ambient air quality assessment. It operates on the principle of volumetric displacement (soap film method), orifice-based differential pressure correlation (orifice flow method), and positive displacement (diaphragm meter method), enabling traceable flow rate determination across a wide dynamic range—from low-flow personal samplers (e.g., 0.1–5 L/min) to high-capacity stack sampling systems (up to 100 L/min). The device simultaneously supports pressure calibration (differential, gauge, and vacuum) and temperature verification (flue gas temperature up to 200 °C), making it compliant with core regulatory workflows required under EPA Method 5, ISO 12103-1, and Chinese national verification regulations including JJG 586–2006, JJG 633–2005, HJ/T 368–2007, and JJF 2033–2023.
Key Features
- Modular architecture supporting interchangeable sensor modules: soap film flow module, orifice flow module, diaphragm-type positive displacement module, digital pressure module, and flue gas temperature probe module.
- Five selectable soap film burettes covering calibrated flow ranges from 0.1 L/min to 50 L/min; seven orifice restrictors available for flow ranges spanning 5–100 L/min.
- Infrared optical sensing system with 1-ms time resolution (0.001 s) and automated volumetric calibration of soap film tubes—eliminating manual timing errors and tube volume drift.
- Real-time conversion between actual (in-situ) conditions and standardized reference conditions: STP (273.15 K, 101.325 kPa), NTP (293.15 K, 101.325 kPa), and 25 °C/101.325 kPa (298.15 K).
- Integrated hand-operated micro-pressure pump for precise generation of differential pressures from –10 kPa to +100 kPa—suitable for calibrating manometers, differential pressure transducers, and pitot tubes.
- 12.6 V / 2.6 Ah lithium-ion battery providing >6 hours of continuous operation under mixed-use conditions (flow + pressure + temperature tasks).
- Industrial-grade 7-inch capacitive color touchscreen with intuitive menu navigation, multilingual UI support (English/Chinese), and context-sensitive help prompts.
Sample Compatibility & Compliance
The GHK-7201 is validated for calibration of a broad spectrum of sampling instrumentation, including but not limited to: particulate matter (PM10, PM2.5) samplers, flue gas analyzers (O2, SO2, NOx), volatile organic compound (VOC) canisters, gas chromatography inlet systems, and isokinetic stack sampling probes. Its measurement traceability aligns with national metrological verification protocols (JJG 586–2006, JJG 633–2005, HJ/T 368–2007, JJF 2033–2023) and supports laboratory quality assurance requirements per CNAS-CL01:2018 (equivalent to ISO/IEC 17025). All internal sensors undergo factory calibration against NIM-traceable standards, with optional certificate of calibration (ISO/IEC 17025 accredited) available upon request.
Software & Data Management
Data acquisition and reporting are fully digitized: each calibration event records flow rate, pressure differential, ambient temperature, barometric pressure, elapsed time, soap film volume, and user-defined metadata (operator ID, instrument ID, site code). Up to 1,000 records are stored internally with timestamp, date, and condition flags. Export is supported via USB 2.0 interface (U-disk compatible) in CSV format for post-processing in Excel or LIMS platforms. Optional Bluetooth-enabled thermal printer allows on-site hardcopy generation of calibration reports—including uncertainty estimates and pass/fail status per specified tolerance limits. Manual entry of local barometric pressure and ambient temperature mitigates sensor-induced bias—critical for high-accuracy standard condition conversions.
Applications
- Periodic verification of stack sampling train flow controllers prior to EPA Method 5 or ISO 9096 compliance testing.
- Field calibration of low-flow personal aerosol samplers used in occupational hygiene surveys (NIOSH/OSHA methods).
- Validation of orifice-based total suspended particulate (TSP) samplers per HJ/T 368–2007.
- Performance checks of gas chromatograph carrier gas flow controllers in environmental labs.
- Pressure zeroing and span adjustment of differential pressure sensors in cleanroom HVAC and fume hood monitoring systems.
- Flue gas temperature probe validation during boiler efficiency audits and combustion optimization studies.
FAQ
Does the GHK-7201 support GLP-compliant audit trails?
Yes—the device logs operator ID, calibration date/time, module configuration, and all raw input parameters. When paired with certified calibration software, it supports 21 CFR Part 11–compliant electronic signatures and immutable record retention.
Can the soap film module be used for liquid flow calibration?
No—it is designed exclusively for gas-phase flow calibration in accordance with JJG 586–2006 and ISO 5167; liquid compatibility is not supported due to surface tension and viscosity constraints.
Is external power required during field use?
No—battery-only operation is standard; AC adapter is provided for benchtop charging and extended lab use, but not required for calibration tasks.
How often does the internal pressure sensor require recalibration?
Annual recalibration is recommended; however, built-in self-diagnostic routines verify sensor linearity and zero stability before each pressure calibration session.
Are calibration certificates included with shipment?
A factory calibration report (non-accredited) is supplied. ISO/IEC 17025-accredited calibration certificates with uncertainty budgets are available as an optional service.
