Water quality affects every aspect of modern life – from drinking water safety to industrial discharge compliance, from aquaculture health to environmental protection. Traditional laboratory testing, while accurate, is slow and often impractical for on‑site decisions. That’s why professionals worldwide are switching to portable multi‑parameter water quality meters that deliver lab‑grade results in the field.
The ERUN-SP4 from Erun Environmental is a game‑changer. Combining spectrophotometry (optical method) with electrode‑based sensors, it measures COD, ammonia nitrogen, total phosphorus, total nitrogen, turbidity, pH, ORP, dissolved oxygen, and conductivity – all in one handheld device. It is fully certified with CE, RoHS, and ISO 9001, ensuring compliance with international quality and safety standards for global application.
Environmental monitoring agencies and water authorities are under increasing pressure to conduct frequent, reliable, and legally defensible water testing. Whether it’s routine surface water monitoring, wastewater treatment plant inspections, or emergency spill response, these organizations need portable instruments that can be deployed anywhere – without sacrificing accuracy.
The ERUN-SP4 has become a trusted tool for many environmental protection bureaus and municipal water departments because it enables:
Real‑time compliance checks – Verify COD, NH₃‑N, TP, TN, and turbidity on the spot.
Reduced sample degradation – No more waiting for lab transport; test immediately at the sampling point.
Cost‑effective field campaigns – One person, one instrument, multiple parameters.
The ERUN-SP4 uses precise spectrophotometry – the same principle as benchtop lab instruments – to measure critical pollutants:
Parameter | Why It Matters |
|---|---|
COD | Organic pollution level, essential for wastewater treatment |
Ammonia nitrogen | Toxicity indicator, key for aquatic life and discharge permits |
Total phosphorus | Eutrophication risk in lakes and rivers |
Total nitrogen | Comprehensive nutrient pollution assessment |
Turbidity | Water clarity, affects disinfection and habitat quality |
With 11 built‑in wavelengths (420–700nm, ±1nm accuracy) and a photometric linearity of ±0.002A, the ERUN-SP4 delivers results you can trust – even in remote locations.
Plug‑and‑play electrodes allow you to measure pH, ORP, conductivity, and dissolved oxygen (fluorescence or polarographic) simultaneously. This makes the ERUN-SP4 a complete mobile laboratory.
Regulatory bodies demand durability, data integrity, and ease of use. The ERUN-SP4 excels in all three, backed by CE, RoHS, and ISO 9001 certifications that guarantee its quality, safety, and reliability across global markets:
9999 record storage with full traceability (parameter, value, unit, date, time)
USB data export – easily transfer data to your existing LIMS or reporting system
Password‑protected settings – prevents unauthorized changes
One‑key factory reset – quick troubleshooting in the field
Drop‑tested portable case – rugged enough for riverside, industrial, or remote sampling sites
“We’ve used the ERUN-SP4 for quarterly river basin surveys and unexpected spill investigations. The ability to measure COD, ammonia, and turbidity in one go saves our team hours per site,” – a senior engineer from a provincial environmental monitoring center.
Parameter | Specification |
|---|---|
Wavelength range | 420–700nm (11 standard, customizable) |
Wavelength accuracy | ±1nm |
Absorbance range | -2.500 to 2.500A |
Photometric linearity | ±0.002A (0–1A) |
Photometric accuracy | ±0.005A (at 1A) |
Dimensions | 230×88×52mm |
Weight | Only 500g |
Battery | 7.4V 1500mAh Li‑ion, Type‑C rechargeable |
Operating environment | 5–40°C, ≤90% RH |
Storage | -40–60°C, ≤90% RH |
ERUN-SP4 host unit ×1
Portable carrying case ×1
Reagents (configurable; up to 10 types for multi‑parameter sets)
Ф25mm cuvettes + dedicated turbidity cuvettes
Test tube racks ×2
Pipette ×1
USB cable + data collection software CD
Electrodes: pH, conductivity, dissolved oxygen, temperature (based on your configuration)
User manual, warranty card, certificate
Environmental monitoring agencies – routine surface/groundwater surveys, pollution source tracing
Water authorities & municipal utilities – drinking water plant intake monitoring, distribution system checks
Wastewater treatment plants – influent/effluent compliance (COD, TP, TN)
Aquaculture farms – real‑time ammonia & DO management
Industrial self‑monitoring – meeting discharge permits
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