Timed, time-proportional, flow-proportional, flow-tracking, external and serial-port controlled sampling
Automatic sampling and analyzer integration
PAS-305A Automatic Water Sampler
For pollution sources, wastewater plant inlet/outlet points and monitoring stations, PAS-305A provides timed, proportional, flow-tracking and externally controlled sampling and supplies representative samples to COD, ammonia, total phosphorus and total nitrogen analyzers.
Timed, time-proportional, flow-proportional, flow-tracking, external and serial-port controlled samplingOver-limit, simultaneous, direct and serial-port controlled sample retentionCan supply samples to COD, ammonia, total phosphorus, total nitrogen, heavy-metal and other online analyzers
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Sampling, retention and analyzer coordination
Over-limit, simultaneous, direct and serial-port controlled sample retention
Can supply samples to COD, ammonia, total phosphorus, total nitrogen, heavy-metal and other online analyzers
Stores sampling, door-open, power-loss and alarm records and resumes operation after power returns
Remote status query, parameter setting, record upload and remote retention control
Digital temperature control, automatic cleaning, mixing-tank drainage and external-pump control
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Product technical specifications
- Sample bottles
- 25 × 1000 mL
- Single sample volume
- 5–1000 mL
- Sampling interval
- 2–9999 min
- Sampling records
- 5000
- Door-open records
- 1000
- Power-loss records
- 1000
- Sample-volume error
- 7%
- Proportional sampling error
- ±10%
- System clock control error
- Δ1 ≤ 0.1%; Δ12 ≤ 30 s
- Temperature-control accuracy
- ±1.5°C
- Vertical sampling lift
- ≥8 m
- Horizontal sampling distance
- ≥80 m
- Piping-system airtightness
- ≤ −0.085 MPa
- Mean time between failures
- ≥1440 h
- Insulation resistance
- >20 MΩ
- Communication interfaces
- RS-232 / RS-485
- Analog interface
- 4–20 mA
- Digital input
- Switch input
- Optional system
- Heating system
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Recommended project positions
Upstream of online analyzers
Provide composite or triggered samples to COD, ammonia, total phosphorus, total nitrogen and heavy-metal analyzers.
Industrial discharge outlets
Sample by time, flow or external signal and retain over-limit samples for traceability.
Wastewater plant inlet and outlet
Cover daily flow variation and reduce the representativeness gap of isolated grab samples.
Existing-system retrofit
Evaluate replacement of or coordination with third-party and Hach samplers after interface and installation review.
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Integration with large analyzers and Hach systems
PAS-305A can serve as the sampling and sample-delivery unit for COD, ammonia, total phosphorus and total nitrogen analyzers and can be assessed for Hach sampler replacement projects. It is not presented as a universal plug-and-play replacement: the exact Hach model, start/ready/fault signals, protocol or register map, tubing, lift, bottle layout and cabinet space must be checked before quotation.
- 01Confirm each connected analyzer brand, model and measurement cycle
- 02Confirm the actual handshake logic over RS-232, RS-485, 4–20 mA or switch input
- 03Confirm sampling distance, vertical lift, tubing, cleaning and drainage
- 04Confirm 25-bottle retention logic, trigger conditions and supervisory records
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Documents prepared after project confirmation
Only source-verified values are published. After receiving the analyzer models and site interfaces, we can prepare a neutral datasheet, I/O coordination schedule, sampling-program confirmation and retrofit quotation.
Share your project requirement- Neutral technical datasheet→
- Analyzer-to-sampler I/O schedule→
- Sampling and retention program confirmation→
- Hach retrofit compatibility review and quotation→
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.