Portable COD Ammonia Nitrogen Total Phosphorus Total Nitrogen Water Quality Tester

The ERUN-SP6-4 portable multi-parameter water quality detector simultaneously measures COD, ammonia nitrogen, total phosphorus, and total nitrogen with ±5% accuracy, supported by CE, ISO 9001, and RoHS certifications – making it the ideal field solution for wastewater monitoring, environmental compliance, and drinking water quality testing.

Water quality testing professionals across wastewater treatment plants, environmental agencies, and industrial facilities need one reliable instrument that delivers accurate results for multiple parameters in both field and laboratory settings. The ERUN-SP6-4 portable water quality detector from Xi‘an Erun Environmental Protection Technology Group is engineered to meet that exact need.

1. Testable Water Quality Parameters of ERUN-SP6-4

The ERUN-SP6-4 measures four critical water quality parameters in a single portable unit: Chemical Oxygen Demand (COD), ammonia nitrogen (NH₃-N), total phosphorus (TP), and total nitrogen (TN).

Detailed testing range & accuracy specification:

COD: 5~2000 mg/L, indicating error ≤±5%
Ammonia nitrogen: 0.02~25 mg/L, indicating error ≤±3%
Total phosphorus: 0.00~10 mg/L, indicating error ≤±5%
Total nitrogen: 0.05~100 mg/L, indicating error ≤±5%

This comprehensive parameter coverage eliminates the need for multiple single-parameter instruments, reducing equipment costs and simplifying field workflows.

2. International Export Certifications

The ERUN-SP6-4 is fully compliant with CE, ISO 9001, and RoHS international standards, ensuring regulatory acceptance across global markets.

CE Certification: Complies with EU safety, health, and environmental mandatory requirements
ISO 9001:2015 Certification: Validates standardized manufacturing quality management system
RoHS Certification: Meets European hazardous substance restriction standards

These qualifications are essential for governmental procurement, regulated industrial projects and cross-border tendering businesses.

3. Testing Accuracy & Core Optical Performance

The ERUN-SP6-4 delivers laboratory-grade accuracy in a portable format, with reproducibility ≤3% and optical stability of less than 0.002A over 20 minutes.

Adopts cold light source + narrow-band interference optical system for stable long-term detection
PID intelligent constant temperature control, digestion temperature control accuracy: ±0.5℃
Standard digestion temperature setting: 165℃ for COD digestion, 120℃ for TP digestion, 125℃ for TN digestion
Total device weight: 1.5kg (0.5kg host + 1kg independent digestion instrument)

4. Field-Oriented Portable Design Advantages

The ERUN-SP6-4 is designed for true portability with multiple power options, compact dimensions, and rugged construction.

4.1 Dimension & Weight

Detector host: 80mm × 230mm × 55mm, 0.5kg
Digestion instrument: 105mm × 160mm × 90mm, 1kg

4.2 Multi-Scenario Power Supply

Built-in lithium battery / car cigarette lighter / portable external lithium battery / 220V AC power supply optional, adaptable to no-power remote field detection sites.

4.3 Industrial Protection Structure

Integral ABS molded shell, waterproof, dustproof and corrosion-resistant; equipped with high-strength customized carrying case for safe outdoor transportation and on-site deployment.

5. Independent Digestion System Working Principle

The ERUN-SP6-4 features a separate digestion instrument that operates independently from the tester, preserving measurement accuracy while enabling flexible field operation.

Sample capacity: Standard 4 samples batch digestion, expandable to 16 samples
Adjustable temperature range: Room temperature ~ 180℃ programmable temperature control
Standard digestion duration: 15min for COD pretreatment, 30min for TP & TN pretreatment
Core advantage: Digestion and detection work separately, operators can complete new sample testing during digestion process, greatly improving field detection efficiency

6. Built-in Data Management Functions

The ERUN-SP6-4 stores 30 standard curves and 199 measured values with full data export capabilities via USB interface.

Complete record content: Time stamp, concentration data, absorbance, light transmittance value
Self-calibration function: Users can edit, calibrate and save custom detection curves
Data transmission: USB wired export, support computer analysis, report generation and printing
Safety configuration: Built-in data power-off protection, no on-site testing data loss
Display: High-definition LCD large screen, clear reading under strong outdoor sunlight

7. Target User Groups & Application Scenarios

The ERUN-SP6-4 serves environmental monitoring agencies, wastewater treatment facilities, industrial compliance teams, aquaculture operations, and drinking water quality inspectors.

Environmental monitoring agencies: On-site pollution source investigation, regular environmental sampling inspection
Wastewater treatment plants: Effluent index verification, whole-process water treatment effect monitoring
Industrial manufacturing factories: Discharge water compliance detection, factory internal water quality daily inspection
Aquaculture farms: Real-time pond water quality monitoring to guarantee aquatic organism survival environment
Drinking water supervision departments: Emergency on-site detection for water pollution incidents

This multi-parameter integrated tester cuts procurement cost compared with purchasing four single-index water analyzers separately.

8. Comparison Between Portable ERUN-SP6-4 and Laboratory Benchtop Analyzers

The ERUN-SP6-4 provides comparable accuracy to benchtop laboratory analyzers while offering significant advantages in portability, speed, and operational simplicity.

Item	ERUN-SP6-4 Portable Tester	Traditional Laboratory Benchtop Analyzer
Detection Accuracy	≤±5% (lab-level precision)	≤±5% standard industry accuracy
Installation Requirement	Portable, no fixed installation needed	Fixed laboratory placement required
Power Consumption	Cold light source current ＜40μA, long battery standby	High power consumption, must connect fixed AC power
Detection Mode	On-site direct testing, no sample preservation needed	Need sample collection, transportation and preservation
Test Cycle	Finished on-site within dozens of minutes	Whole testing cycle takes 1~3 working days

9. Brand Strength: Why Choose ERUN Environmental Protection

Xi‘an Erun Environmental Protection Technology Group is a Chinese National High-Tech Enterprise established in 2014 with a registered capital of 51.8 million RMB, delivering certified quality and global technical support.

Full-series products pass CE, ISO 9001, RoHS international certification
Free professional operation training for global clients
Free exclusive ERUN cloud platform for intelligent data statistics and management
Global localized after-sales & technical support for environmental monitoring equipment

Brand Slogan: Innovation for a Cleaner Tomorrow.

10. Product FAQ

Q: Can the ERUN-SP6-4 test drinking water quality?

A: Yes. The ERUN-SP6-4 measures COD, ammonia nitrogen, total phosphorus, and total nitrogen – parameters relevant to drinking water safety assessments and contamination events.

Q: What is the warranty on the ERUN-SP6-4?

A: Contact ERUN directly for warranty terms and after-sales support details.

Q: How long does a single battery charge last?

A: The host‘s high-capacity rechargeable lithium battery supports up to six months of use under normal operating conditions.

Q: Does the ERUN-SP6-4 come with reagents?

A: Reagent kits are available for all four parameters. Contact ERUN for complete kit specifications.

Q: Is the ERUN-SP6-4 suitable for industrial wastewater monitoring?

A: Yes. The instrument is widely used for industrial effluent monitoring, with anti-chlorine interference up to 2000 mg/L for COD determination.

Xi‘an Erun Environmental Protection Technology Group – Innovation for a water quality Cleaner Tomorrow.