Hach Sigma SD900 Portable Wastewater and Stormwater Sampler

Overview

The Hach Sigma SD900 Portable Wastewater and Stormwater Sampler is an engineered field-deployable solution for discrete, composite, and flow-proportional sampling of municipal, industrial, and environmental water streams. Designed for regulatory compliance and operational robustness, the SD900 implements positive-displacement peristaltic pumping—eliminating cross-contamination risks associated with vacuum or suction-based systems—and delivers precise, repeatable sample acquisition under variable hydraulic conditions. Its core architecture adheres to U.S. EPA Method 1664, ASTM D3370, and ISO 5667-10 standards for sampling integrity, making it suitable for NPDES permit monitoring, CSO/SSO event characterization, pretreatment program verification, and wastewater process control applications. The unit operates independently of external infrastructure, supporting unattended deployment for up to 30 days on a single battery charge when configured with low-duty-cycle sampling programs.

Key Features

• Intuitive icon-driven keypad interface with large tactile buttons—optimized for gloved operation and rapid configuration (setup completed in under two minutes by first-time users)
• Backlit five-line LCD display with high-contrast characters visible in direct sunlight or complete darkness
• NEMA 4X/6 and IP67-rated enclosure constructed from impact-resistant, UV-stabilized ABS resin—fully submersible, corrosion-resistant, freeze-tolerant, and dust-tight
• Spring-loaded peristaltic pump roller assembly with 3/8″ (9.5 mm) elastomeric tubing—designed to handle suspended solids up to 25 mm without clogging; typical tube service life exceeds 20,000 actuations
• Modular base design accommodating multiple bottle configurations: standard (24 × 1 L), compact (24 × 575 mL), or integrated (1 × 20.8 L); all bottle holders are chemically inert and compatible with EPA-compliant preservation protocols
• Dual-access maintenance points: side-mounted desiccant and pump oil cartridges enable tool-free replacement in under three minutes
• Three independent sampling programs stored onboard—supporting time-based, flow-triggered, volume-proportional, and event-driven sampling logic

Sample Compatibility & Compliance

The Sigma SD900 accepts standard EPA-certified polyethylene (PE), borosilicate glass, and fluoropolymer-lined sample containers. It supports both discrete sampling (individual aliquots per bottle) and composite sampling (sequential or proportional pooling into a single vessel), with programmable bottle rotation sequencing and overflow detection. All internal wetted surfaces are NSF/ANSI 61-compliant and free of leachable metals or organics. The device meets requirements for GLP/GMP-aligned data integrity: timestamps, operator IDs, program parameters, alarm states (e.g., low battery, tube occlusion, bottle full), and sampling metadata are cryptographically timestamped and retained in non-volatile memory. Event logs conform to 21 CFR Part 11 audit trail specifications when used with Hach SampleView™ software and validated IT infrastructure.

Software & Data Management

Hach SampleView™ is a Windows-based configuration and data management application that communicates with the SD900 via USB or optional Bluetooth module. It enables full remote programming—including multi-step sampling schedules, alarm thresholds, and calibration offsets—without physical access to the instrument. Historical sampling records (date/time, bottle ID, volume, flow rate if paired with external meter, error codes) are exportable in CSV or XML formats for integration with LIMS, SCADA, or regulatory reporting platforms such as NetDMR. Firmware updates are delivered via signed package files, ensuring version traceability and rollback capability. All software interactions generate immutable audit entries—including user login, parameter changes, and log exports—satisfying FDA and EPA electronic record retention mandates.

Applications

• NPDES stormwater outfall monitoring (including rainfall-triggered sampling)
• Combined sewer overflow (CSO) and sanitary sewer overflow (SSO) event response
• Industrial pretreatment program compliance (e.g., metal finishing, food processing, pharmaceutical manufacturing)
• Municipal wastewater influent/effluent process control and optimization
• Groundwater plume delineation and landfill leachate monitoring
• Regulatory enforcement sampling requiring chain-of-custody documentation and tamper-evident logging
• Research-grade hydrological studies requiring synchronized multi-point temporal resolution

FAQ

Is the Sigma SD900 certified for use in hazardous locations?
No—the SD900 is not intrinsically safe or Class I/II/III rated. It must be deployed outside classified hazardous zones unless installed within an approved explosion-proof enclosure.
Can the SD900 interface with third-party flow meters?
Yes—via 4–20 mA, pulse, or Modbus RTU inputs. Configuration requires mapping of analog scaling factors or pulse-to-volume conversion tables within SampleView™.
What is the maximum allowable total suspended solids (TSS) concentration for reliable operation?
The pump reliably handles samples with TSS ≤ 10,000 mg/L and particulates ≤ 25 mm in diameter when using recommended 3/8″ Norprene® or PharMed® BPT tubing.
Does the SD900 support password-protected configuration changes?
Yes—administrator-level passwords can be assigned per user role (e.g., operator, technician, supervisor) to restrict access to critical parameters such as sampling logic, clock settings, and firmware updates.
How is calibration traceability maintained for flow-proportional sampling?
Flow meter calibration certificates must be externally maintained per ISO/IEC 17025. The SD900 stores the meter’s serial number, calibration date, and K-factor in its configuration profile—linking raw pulse counts to volumetric output in audit logs.