Hach Amtax NA8000 Online Ammonia Nitrogen Analyzer
| Brand | Hach |
|---|---|
| Origin | Imported |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Model | Amtax NA8000 |
| Instrument Type | Online Analyzer |
| Measurement Principle | Salicylate–Indophenol Blue Method |
| Measurement Range | NA8000.01: 0.020–160.0 mg/L (auto-ranging) |
| NA8000.02 | 0.020–1000 mg/L (auto-ranging with dilution) |
| Accuracy | 0.020–15.00 mg/L: ±(0.06 mg/L or 3%) |
| 0.050–30.00 mg/L | ±(0.15 mg/L or 3%) |
| 12.00–160.0 mg/L | ±(0.90 mg/L or 3%) |
| 80.00–1000 mg/L | ±10% |
| Detection Limit | 0.02 mg/L |
| Measurement Cycle | 10–15 minutes |
| Repeatability | ≤2% (low range) to ≤3% (high range) |
| Display Resolution | 0.001 mg/L (≤9.999), 0.01 mg/L (10.00–99.99), 0.1 mg/L (100.0–999.9), 1 mg/L (≥1000) |
| Power Consumption | 100 W |
| Sampling Pressure | 0.04–1 bar (0.6–14.5 psi) |
| Sampling Flow Rate | 100–600 mL/min |
| Sampling Temperature | 5–40 °C |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤95% RH (non-condensing) |
| Enclosure Rating | IP55 (indoor use only) |
| Dimensions (L×W×H) | 455 × 365 × 805 mm |
| Weight | ~28 kg (excl. reagents) |
| Power Supply | 100–240 VAC, 50/60 Hz |
| Outputs | 2 × 24 VDC/3 A SPDT relays |
| Data Storage | 20,000 records |
| Event Log Capacity | 20,000 entries (retained for ≥2 years) |
| Calibration | Automatic, manual, or remote-triggered |
| Sample Pretreatment Compatibility | CYQ-series water samplers (e.g., CYQ-106C, CYQ-104C) |
Overview
The Hach Amtax NA8000 is a high-performance online ammonia nitrogen analyzer engineered for continuous, unattended monitoring of ammonium (NH₄⁺) in aqueous matrices across municipal wastewater treatment plants, industrial effluent discharge points, surface water bodies, and groundwater surveillance networks. It implements the standardized salicylate–indophenol blue colorimetric method—fully compliant with U.S. EPA Method 350.1, ISO 7150-1, and Chinese environmental standards HJ 101–2019 and HJ 35X–2019—ensuring analytical equivalence with laboratory reference procedures (e.g., HJ 536–2009). The instrument utilizes dual-wavelength, dual-optical-path cuvette technology (patented under CN ZL 2017 2 0404712.9) to compensate for turbidity-induced interference and photometric drift, thereby extending dynamic range and enhancing measurement robustness without mechanical moving parts in the optical path. Its fully automated operation—including sample aspiration, reagent dosing, reaction incubation, photometric detection, waste separation, and system cleaning—is designed for long-term stability in demanding field environments with minimal operator intervention.
Key Features
- Patented dual-beam optical architecture with real-time reference channel correction for turbidity, lamp aging, and power supply fluctuations
- Prognosys predictive diagnostics: provides early warnings for component degradation (e.g., pump wear, reagent depletion, optical fouling) via on-screen progress indicators and digital interface alerts
- Diagnose self-diagnostics engine: performs comprehensive subsystem validation (fluidic integrity, photometer linearity, temperature stability, valve sequencing) and reports results locally and via Modbus
- Stable ambient-temperature reagent formulation (LCW936-CN series) eliminates refrigeration requirements and extends shelf life
- Integrated standard verification: automatic post-calibration check using certified reference materials (e.g., LCW939-CN, LCW940-CN); configurable QC frequency and pass/fail thresholds per regulatory protocols
- Optional segregated waste handling: independent collection paths for analysis waste and cleaning waste (9995500 module) reduce cross-contamination risk and simplify hazardous waste classification
- Modular I/O expansion: supports analog outputs (4–20 mA), relay control (SPDT), digital inputs, and RS485 Modbus RTU for seamless integration into SCADA and DCS platforms
Sample Compatibility & Compliance
The Amtax NA8000 accommodates raw and pretreated water samples within a temperature range of 5–40 °C and inlet pressure of 0.04–1 bar. For high-turbidity or particulate-laden influents—such as primary clarifier effluent or mixed liquor—the optional CYQ-series inline pre-filters (e.g., CYQ-104C with 0.1 µm PVDF membrane) ensure consistent flow and protect internal fluidics. All wetted materials comply with USP Class VI biocompatibility requirements, and the analyzer meets CE marking directives (2014/30/EU EMC, 2014/35/EU LVD). Its data management architecture supports audit-trail functionality aligned with GLP and GMP principles, including timestamped event logging, user-access tracking, and immutable calibration history—facilitating compliance with regulatory frameworks requiring traceability (e.g., U.S. EPA 40 CFR Part 136, EU Water Framework Directive reporting).
Software & Data Management
The embedded firmware delivers intuitive operation via a 7-inch color touchscreen with bilingual (English/Chinese) UI and context-sensitive help. All configuration parameters—including measurement interval (continuous, 30 min, 1 h, 2 h, 4 h, or user-defined), calibration schedule, alarm thresholds, and QC trigger logic—are programmable without external software. Internal memory retains 20,000 measurement records and 20,000 diagnostic/event logs for ≥2 years under typical duty cycles. Data export is supported via USB mass storage or Modbus polling. Optional Hach Insight™ cloud connectivity enables remote monitoring, predictive maintenance analytics, and centralized fleet management—while maintaining full local control and data sovereignty. Firmware updates are performed via signed package installation to ensure integrity and version traceability.
Applications
- Municipal wastewater treatment: real-time monitoring at influent, secondary clarifier effluent, and disinfection outfall to support nitrification/denitrification process control and regulatory discharge reporting
- Industrial pretreatment systems: continuous compliance verification for food processing, pharmaceutical manufacturing, and chemical production facilities subject to local NPDES or permit limits
- Surface water quality networks: long-term trend analysis in rivers, reservoirs, and estuaries where nutrient loading impacts eutrophication risk assessment
- Groundwater remediation sites: tracking ammonia breakthrough during pump-and-treat operations or monitored natural attenuation studies
- Drinking water distribution: detection of nitrification events in chloraminated systems where free ammonia serves as a precursor to disinfection byproduct formation
FAQ
What regulatory standards does the Amtax NA8000 meet for ammonia nitrogen measurement?
It complies with HJ 101–2019 and HJ 35X–2019 (China), ISO 7150-1:1984, and U.S. EPA Method 350.1. Its methodology is validated against HJ 536–2009 laboratory reference data.
How does the dual-optical-path design improve measurement reliability?
By simultaneously measuring sample absorbance and reference beam intensity, it corrects for scattering effects from suspended solids and compensates for LED intensity drift—eliminating the need for frequent blank corrections.
Can the analyzer operate without refrigerated reagents?
Yes. The LCW936-CN reagent suite is formulated for stable performance at ambient temperatures (5–40 °C), reducing infrastructure dependency and operational complexity.
Is remote calibration and diagnostic access supported?
Calibration can be initiated manually, on a timed schedule, or triggered remotely via Modbus command. Diagnostics and Prognosys alerts are accessible through both local display and digital interfaces.
What pretreatment options are recommended for high-solids wastewater?
The CYQ-104C (0.1 µm PVDF) or CYQ-106C (100 µm stainless steel) inline samplers provide effective particulate removal while maintaining representative sampling integrity.
