The ERUN‑SP4 portable multi‑parameter water quality meter delivers precise ammonia nitrogen detection with ISO 9001 quality management and RoHS compliance—making it the reliable choice for drinking water, surface water, and wastewater testing worldwide.
Whether you are monitoring environmental water quality, managing industrial wastewater discharge, or conducting field research, having a portable ammonia nitrogen analyzer you can trust is essential. With ISO 9001 certification ensuring consistent manufacturing quality and RoHS compliance guaranteeing environmental safety, the ERUN‑SP4 is engineered to meet international standards while delivering laboratory‑grade accuracy in the field.
A portable ammonia nitrogen analyzer is a compact, field‑deployable instrument that measures the concentration of ammonia nitrogen (NH₃‑N) in water samples using colorimetric or electrode methods. It enables real‑time water quality assessment without the need to transport samples to a laboratory.
Ammonia nitrogen is a critical water quality parameter because elevated levels indicate organic pollution from agricultural runoff, sewage discharge, or industrial effluents. Regular monitoring helps facilities comply with environmental regulations, protect aquatic ecosystems, and ensure drinking water safety. The ERUN‑SP4 combines optical and electrode methods in one portable device, allowing users to measure ammonia nitrogen alongside pH, ORP, conductivity, and dissolved oxygen.
The ERUN‑SP4 portable ammonia nitrogen analyzer delivers precise measurements through advanced optical and electrode technologies.
Wavelength range: 420nm to 700nm with 11 standard wavelengths, customizable upon request
Wavelength accuracy: ±1nm
Absorbance range: -2.500 to 2.500A
Colorimetric linearity: ±0.002A (0‑1A)
Colorimetric accuracy: ±0.005A at 1A
Dimensions: 230mm × 88mm × 52mm—truly portable for field use
Weight: only 500g, reducing operator fatigue during extended fieldwork
Operating temperature: 5‑40°C; storage: -40‑60°C
Rechargeable lithium battery: 7.4V 1500mAh with Type‑C charging port
These specifications meet or exceed industry standards for portable water quality analyzers, with comparable products on the market offering similar accuracy of ≤±5% and detection limits as low as 0.01mg/L.
ISO 9001 certification means the ERUN‑SP4 is manufactured under a quality management system that ensures consistent product quality from raw material sourcing to final assembly. RoHS compliance guarantees the instrument is free from hazardous substances like lead, mercury, and cadmium—critical for environmental monitoring applications and international trade.
For international buyers, these certifications are non‑negotiable. Many competing portable ammonia nitrogen analyzers also highlight ISO 9001 and RoHS, CE, or FCC certifications. The ERUN‑SP4 meets these same rigorous standards, ensuring smooth customs clearance and regulatory acceptance in major markets including the EU, US, and beyond.
The ERUN‑SP4 is not just an ammonia nitrogen analyzer—it is a comprehensive water quality testing solution.
Fluorescence method dissolved oxygen
Polarographic method dissolved oxygen
pH, ORP, conductivity
Automatic wavelength selection—no manual adjustment required
LCD large screen display with intuitive operation
Stores up to 9,999 measurement records including parameter name, concentration, unit, and timestamp
User‑calibratable curves: 250 factory curves + 749 user‑defined curves (999 total)
One‑key factory reset function
Password‑protected system settings to prevent unauthorized changes
PC data acquisition software for data collection, storage, editing, and printing
Imported high‑performance LED light source and silicon photoelectric sensor
Data power failure protection
This multi‑parameter capability makes the ERUN‑SP4 ideal for drinking water quality monitoring, surface water assessment, and wastewater treatment plant testing.
Every ERUN‑SP4 portable ammonia nitrogen analyzer ships with everything you need to start testing immediately:
Item | Quantity |
Host instrument | 1 |
Portable carrying case | 1 |
Reagents (standard configuration per parameter, 10+ parameters with 10 sets) | As configured |
Colorimetric tubes (Ф25mm) | Multiple |
Special colorimetric tubes (turbidity method only) | 3 |
Test tube rack | 2 |
Pipette gun | 1 |
USB cable | 1 |
pH composite electrode | 1 |
Conductivity electrode | 1 |
Dissolved oxygen electrode | 1 |
Temperature electrode | 1 |
Data acquisition software CD | 1 |
Instruction manual | 1 |
Certificate of conformity | 1 |
Warranty card | 1 |
The portable ammonia nitrogen analyzer ERUN‑SP4 is widely used across multiple industries and applications:
Drinking water treatment plants — ensuring ammonia nitrogen levels remain within safe limits
Surface water monitoring — assessing river, lake, and reservoir water quality
Wastewater treatment facilities — monitoring effluent compliance
Industrial discharge inspection — verifying regulatory compliance
Environmental research — field data collection for academic and government studies
Aquaculture — maintaining optimal water conditions for fish and shellfish
Q: What is the detection method for ammonia nitrogen on the ERUN‑SP4?
A: The ERUN‑SP4 supports both optical colorimetric methods (using Nessler's reagent or salicylic acid spectrophotometry) and electrode‑based detection, giving users flexibility based on their specific application requirements.
Q: Can I use this analyzer for other water quality parameters?
A: Yes. The ERUN‑SP4 is a multi‑parameter instrument that measures pH, ORP, conductivity, dissolved oxygen, and more—in addition to ammonia nitrogen.
Q: What languages does the interface support?
A: The LCD display supports Chinese and can be configured for other languages upon request.
Q: How does the ERUN‑SP4 compare to other portable ammonia nitrogen analyzers?
A: The ERUN‑SP4 offers comparable accuracy (≤±5%) and detection limits to leading brands, with the added advantage of multi‑parameter capability, 9,999‑record storage, and both optical and electrode methods in a single 500g portable package.
Erun Environmental combines years of water quality testing expertise with rigorous ISO 9001 quality management and RoHS‑compliant manufacturing. Every ERUN‑SP4 portable ammonia nitrogen analyzer is built to deliver reliable, accurate results in the field—backed by comprehensive technical support and a commitment to customer satisfaction. Contact us today to discuss your water quality testing requirements.
For more information about the ERUN‑SP4 portable multi‑parameter water quality meter, visit: https://www.erunwas.com/products‑detail/id‑250.html
