Turbidity Meter & Sensor Manufacturer 2026 | CE ISO 9001 RoHS Certified

Executive Summary The global turbidity meter market is experiencing robust growth, driven by tightening water quality regulations and expanding industrial automation. For procurement professionals and distributors evaluating turbidity measurement solutions, understanding key technical standards, market dynamics, and product capabilities is essential for making informed purchasing decisions.

Why Turbidity Measurement Matters More Than Ever in 2026

Turbidity measurement is fundamental to water quality management. A turbidity meter quantifies water clarity by detecting light scattered by suspended particles, with results expressed in Nephelometric Turbidity Units (NTU) or Formazin Nephelometric Units (FNU).

The global turbidity sensor market was valued at approximately USD 850 million in 2025 and is projected to reach USD 1,460 million by 2032, expanding at a CAGR of 8.0%. The portable turbidity meter segment alone generated approximately RMB 1.286 billion in revenue in 2025, with a projected CAGR of 4.0% through 2032.

Key market drivers include:

Stricter regulatory frameworks (e.g., EU Directive 2184/2020, US EPA Method 180.1, ISO 7027)
Growing demand for real-time online monitoring in drinking water and wastewater treatment
Construction industry adoption for runoff monitoring (US$1.3 billion sector in 2026, 7.1% CAGR)
Increasing industrial water treatment needs in cooling towers and process water systems

Key Technical Standards Every Buyer Must Know

When sourcing turbidity meters or sensors, compliance with internationally recognized standards is non-negotiable:

Standard	Method	Application	Light Source
US EPA 180.1	Nephelometric (90° scatter)	Drinking water, regulatory compliance	White light (tungsten lamp)
ISO 7027	Nephelometric (90° scatter)	All water types, industrial use	Infrared LED (860 nm)
ISO 7027 / EN 27027	90° scattered light method	European drinking water protocol	Infrared

> NTU applies to EPA 180.1 compliant instruments; FNU applies to ISO 7027 compliant instruments

The nephelometric method—detecting light scattered at a 90° angle to the incident beam—is the gold standard for low to moderate turbidity ranges (0-1000 NTU), offering optimal sensitivity for particles sized 1.0 micron or smaller.

Product Spotlight: ERUN Environmental Protection Turbidity Solutions

For international buyers seeking CE‑certified, RoHS‑compliant, and ISO 9001‑certified turbidity measurement instruments, ERUN Environmental Protection offers two comprehensive solutions:

▶ Portable Turbidity Meter – ERUN‑SP5‑B6

Field‑ready water quality analysis with laboratory accuracy

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Specification	ERUN-SP5-B6
Measurement Range	0–1000 NTU
Resolution	0.001–0.1 NTU
Repeatability	≤2%
Indicated Error	±5% or ±0.1 NTU (whichever greater)
Zero‑point Drift	±0.05% F.S.
Calibration	Up to 5‑point with standard solutions
Unit Modes	NTU / FTU / EBC (switchable)
Data Storage	10 million+ sets
Power Supply	5200mAh rechargeable Li‑ion battery
Protection Rating	IP66
Weight	~600g
Certifications	CE, RoHS, ISO 9001

Key Features:

Dual‑light source system for ISO/EPA method switching – compliant with EPA 180.1 and ISO 7027
Built‑in water turbidity calibration curves for immediate use
Standard and continuous measurement modes
FREE ERUN Cloud communication software included
ERUN Water Pollution Monitoring System V1.0 integrated

▶ Online Oil‑in‑Water Analyzer – ERUN‑J4

Continuous, real‑time oil contamination monitoring

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Specification	ERUN-J4
Measuring Range	0–50 ppm / 0–0.40 FLU
Working Principle	Ultraviolet fluorescence method
Resolution	0.01 ppm
Accuracy	±5% FS
Max. Immersion Depth	10m
Temperature Range	0.0–50.0℃
Output Signal	RS485
Housing Material	Stainless steel
IP Rating	IP68
Cable Length	10m (standard)
Certifications	CE, RoHS, ISO 9001

Applications:

Surface water, drinking water, municipal sewage, agricultural wastewater, industrial wastewater, and sewage treatment

Application Scenarios by Industry

Industry	Application	Recommended Solution
Drinking Water Utilities	Compliance monitoring of filtered water	ERUN-SP5-B6 (Portable)
Wastewater Treatment	Final effluent monitoring	ERUN-SP5-B6
Industrial Process Water	Cooling tower / boiler feed water	ERUN-SP5-B6
Environmental Monitoring	Field testing rivers, lakes, groundwater	ERUN-SP5-B6
Oil & Gas / Petrochemical	Oil‑in‑water discharge monitoring	ERUN-J4
Municipal Sewage	Oil contamination detection	ERUN-J4

Buyer’s Checklist: What to Look For in a Turbidity Meter

Selection Criteria	Why It Matters
ISO 9001 / CE / RoHS certifications	Regulatory acceptance and quality assurance
Dual EPA/ISO method support	Global compatibility across jurisdictions
Calibration flexibility (≥5 points)	Accuracy across the full measurement range
IP rating (IP66 or higher for field use)	Durability in harsh environments
Long‑life light source	Lower total cost of ownership
Data logging capacity	Traceability and compliance reporting
Cloud connectivity	Remote monitoring and data integration

FAQ – Frequently Asked Questions

Q1: What is the difference between NTU and FNU?

> NTU is measured with white light according to US EPA Method 180.1; FNU is measured with infrared light according to ISO 7027. Both express turbidity levels, but the appropriate unit depends on the regulatory standard governing your application.

Q2: Can portable turbidity meters be used for regulatory compliance reporting?

> Yes. Instruments compliant with EPA 180.1 or ISO 7027 are accepted for regulatory reporting in most jurisdictions. The ERUN-SP5‑B6 supports both standards with its dual‑light source system.

Q3: How often should a turbidity meter be calibrated?

> Daily calibration is recommended for compliance monitoring; weekly or monthly may suffice for less critical applications. The ERUN‑SP5‑B6 supports up to 5‑point calibration using standard solutions for optimal accuracy.

Q4: Does the online analyzer require special maintenance?

> The ERUN‑J4 features a compact design with simple installation and maintenance, effectively resisting ambient light interference while delivering excellent repeatability and high stability. Its stainless steel housing and IP68 rating suit harsh field conditions.

Q5: What is the expected sensor lifetime?

> Both products utilize long‑life optical components. The ERUN‑SP5‑B6 is equipped with a long‑life light source as standard; the ERUN‑J4 features precision optical components designed for extended operational service.

Glossary of Key Terms

Term	Definition
Nephelometry	Measurement of light scattered at 90° to the incident beam; the standard method for turbidity determination.
NTU	Nephelometric Turbidity Units; measured with white light per EPA 180.1.
FNU	Formazin Nephelometric Units; measured with infrared light per ISO 7027.
Formazin	Primary reference standard for turbidity calibration.
Attenuation	Measurement of light intensity loss through a sample; suitable for high turbidity ranges.

Why Choose ERUN Environmental Protection?

ERUN Environmental Protection is a China‑based manufacturer specializing in water quality analysis instruments, including turbidity meters, online sensors, and multiparameter water testing equipment. All products are manufactured under ISO 9001 quality management and carry CE and RoHS certifications, ensuring compliance with international regulatory requirements for export markets. The company serves clients across water treatment, environmental monitoring, industrial process control, and municipal wastewater sectors.

For bulk orders, OEM inquiries, and international distribution partnerships, visit www.erunwas.com or contact the sales team directly via the product pages.

ERUN Environmental Protection – your trusted partner for certified water quality analysis instruments, serving global markets with CE, RoHS, and ISO 9001 compliance.