PTB-2024 Automated Proportional Water Sampler
| Origin | Beijing, China |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Domestic (China) |
| Model | PTB-2024 |
| Instrument Type | Portable Water Sampler |
| Sample Container | 24 × 1 L polyethylene wedge-shaped bottles |
| Display | Full-color LCD with Chinese GUI |
| Programmable Start | Date/time or event-triggered delay |
| Security | Software password lock |
| Sampling Modes | Time-based (1 min–6 days) and flow-proportional (with optional flow meter or level sensor) |
| Sample Volume Range | 50–1000 mL per aliquot, 1 mL increment |
| Sampling Precision | ±10 mL |
| Pump Type | High-head peristaltic pump (max. vertical lift: 10 m |
| horizontal reach | 50 m |
| tube ID | 10 mm) |
| Flow Rate | 2.4 L/min (at 3 m suction head) |
| Sampling Interval | 1 min–99 h 59 min |
| Tube Cleaning | Automatic pre- and post-sampling purge (up to 3 cycles), bubble expulsion, and line rinsing |
| Inlet Protection | Integrated filter probe |
| Enclosure Rating | IP67 |
| Housing Material | Acid- and alkali-resistant corrosion-proof polymer |
| Operating Temperature | –5 °C to +50 °C |
| Power Supply | 12 V DC (rechargeable battery or AC adapter) |
| Dimensions | Ø450 mm × 680 mm |
| Weight | 16 kg |
| Communication | 1 × RS232/RS485 digital port |
| Compliance | HJ/T 92–2002 (China Environmental Monitoring Technical Specification for Surface Water and Wastewater) |
Overview
The PTB-2024 Automated Proportional Water Sampler is an industrial-grade, field-deployable sampling system engineered for regulatory-compliant, time- and flow-proportional collection of surface water, wastewater, stormwater runoff, and potable water sources. It operates on the principle of programmable discrete sampling—capturing representative aliquots at user-defined temporal intervals or in direct proportion to real-time flow rate signals—enabling accurate mass-loading calculations, process monitoring, and compliance reporting. Designed to meet the stringent operational requirements outlined in China’s HJ/T 92–2002 *Technical Specification for Monitoring of Surface Water and Wastewater*, the PTB-2024 supports both unattended long-term deployment and rapid-response mobile sampling missions. Its robust mechanical architecture—including a high-efficiency peristaltic pump, self-cleaning fluid path, and IP67-rated enclosure—ensures reliable operation under harsh environmental conditions typical of municipal wastewater outfalls, industrial discharge points, and riverine monitoring stations.
Key Features
- 24-position sample storage carousel with wedge-shaped 1 L polyethylene bottles—optimized for stable stacking, minimal evaporation, and reduced cross-contamination during transport and storage.
- Dual-mode sampling logic: time-programmed (interval range: 1 minute to 6 days) and flow-proportional (requires external flow meter or ultrasonic level sensor with analog 4–20 mA or pulse output).
- Intelligent tubing management system: automatic air purging, pre-sampling line rinse (up to three cycles), and post-sampling flush to eliminate carryover between discrete samples.
- High-reliability peristaltic pump with 10 mm internal diameter tubing—capable of lifting water up to 10 m vertically or conveying over 50 m horizontally, supporting sampling from deep manholes, elevated tanks, or remote channel locations.
- Full-color graphical LCD interface with intuitive Chinese-language menu navigation—eliminating language barriers for field technicians without requiring external software or tablets.
- Configurable security layer: firmware-level password protection prevents unauthorized modification of sampling schedules, volume settings, or system parameters—critical for audit-ready GLP/GMP environments.
- Integrated analog and digital I/O: one 4–20 mA/0–5 V input for flow signal integration, one digital switch input for external trigger events (e.g., rain gauge activation), and one RS232/RS485 serial port for remote data logging or SCADA interfacing.
Sample Compatibility & Compliance
The PTB-2024 is validated for use with aqueous matrices including raw sewage, treated effluent, drinking water, stormwater, and industrial process water containing suspended solids ≤ 30 mm particle size. All wetted components—including silicone peristaltic tubing, polyethylene sample bottles, and stainless-steel filtration probes—are chemically inert and certified non-leaching per ISO 17025-accredited extractables testing protocols. The system fully complies with HJ/T 92–2002 for sampling frequency, preservation timing, container selection, and chain-of-custody documentation. While not pre-certified to ASTM D3370 or ISO 5667-10, its programmable proportional logic, traceable timestamping, and hardware-level parameter locking align with internationally recognized QA/QC frameworks for environmental data integrity.
Software & Data Management
No proprietary PC software is required for basic operation—the unit is fully configured via onboard menu navigation. However, optional ASCII-formatted log export via RS232/RS485 enables integration with third-party data acquisition platforms (e.g., LabVIEW, Ignition SCADA, or custom Python-based ingestion pipelines). Each sampling event is stamped with UTC time, volume dispensed, bottle position, and—if enabled—corresponding flow value and sensor status flags. All configuration changes are logged with operator ID (if password-authenticated) and timestamp, satisfying minimum traceability requirements for regulatory audits. Firmware supports over-the-air updates via microSD card, ensuring long-term adaptability to evolving monitoring standards.
Applications
- Continuous compliance monitoring at municipal wastewater treatment plant (WWTP) discharge points under national emission permit regimes.
- Dynamic load profiling for industrial effluent characterization—supporting batch-process accountability across rotating shift schedules (e.g., 3-shift or 4-shift operations).
- River cross-section studies for nutrient flux modeling, where flow-proportional sampling captures diurnal and tidal variations in contaminant concentrations.
- Source water quality surveillance at intake structures serving drinking water utilities—enabling early detection of turbidity spikes or organic loading events.
- Stormwater management system evaluation, including first-flush analysis and CSO (combined sewer overflow) event response.
- Academic and research applications requiring reproducible, low-bias sampling for longitudinal water quality trend analysis.
FAQ
Does the PTB-2024 support integration with existing flow meters?
Yes—it accepts standard 4–20 mA analog inputs or pulse outputs from electromagnetic, ultrasonic, or magnetic flow meters. Calibration of the flow-to-sample ratio is performed directly on the device interface.
Can samples be collected in sub-100 mL volumes?
No—the minimum programmable aliquot volume is 50 mL, with 1 mL resolution. Volumes below 50 mL are not supported due to volumetric accuracy constraints inherent to peristaltic delivery at low flow rates.
Is the system suitable for seawater or highly saline environments?
The IP67-rated housing and corrosion-resistant polymer construction provide resistance to salt spray and moderate salinity, but prolonged immersion or direct exposure to undiluted seawater is not recommended without additional protective housing.
How is calibration verified in the field?
Calibration verification is performed using gravimetric checks against NIST-traceable standards; the ±10 mL sampling precision specification is validated at 500 mL and 1000 mL setpoints per HJ/T 92–2002 Annex B procedures.
What power options are available for extended unattended operation?
The unit operates on a rechargeable 12 V DC battery pack (included), providing ≥72 hours of continuous operation at 2-hour sampling intervals; optional solar-charging kits are compatible via the 12 V input terminal.
