Precision Water Quality Analysis for Industry & Research

Trusted by laboratories and wastewater treatment facilities worldwide, LH Water Analysis delivers accurate, reliable, and innovative water testing solutions with over 40 years of engineering excellence.

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40+ Years

Industry Experience

100+

Products Worldwide

165°C

Fast COD Digestion

About LH Water Analysis

Shanghai Lianhua Industrial Co., Ltd., operating under the brand name Lianhua, is a leading Chinese manufacturer of water quality analyzers with nearly 40 years of experience. We specialize in developing high-precision instruments for BOD, COD, multi-parameter analysis, and laboratory equipment used in environmental monitoring, industrial processes, and research.

With two advanced production bases in China, we are committed to innovation, accuracy, and reliability. Our mission is to provide complete water analysis solutions that empower laboratories and treatment plants to make data-driven decisions with confidence.

Over 40 years of technical expertise
Dual manufacturing facilities
Global distribution network
ISO-compliant quality standards

Our Products

From portable field testers to advanced spectrophotometers, our product line covers every aspect of water quality analysis with precision, speed, and ease of use.

Biochemical Oxygen Demand BOD Instrument LH-BOD606

BOD Analyzer LH-BOD606

Advanced BOD testing with touch screen, data plotting, and cloud upload capability. 1-6 samples independently tested with optional culture periods from 1-30 days.

• 1-30 day culture period
• Touch screen interface
• Wireless data upload
• Cloud platform integration

COD Analyzer 5B-3C(V8)

Rapid COD testing with only 10 minutes of digestion at 165°C. Accurate results in under 20 minutes with minimal reagent use.

• 10 min digestion at 165°C
• Results in <20 min
• Low reagent consumption
• High accuracy

Digital Titrator

Precision titration for laboratory and industrial applications. Ideal for pH, acidity, alkalinity, and hardness testing.

• High-precision dosing
• Digital display
• Automated endpoint detection
• Multiple titration modes

Handheld Multi-parameter Water Quality Tester LH-P700

Handheld LH-P700

Portable multi-parameter tester with integrated digester and battery. Supports 40+ water quality indicators.

• 40+ detectable parameters
• Integrated digester
• Portable lithium battery
• All-in-one case

UV-Vis Spectrophotometer LH-S700

Advanced spectrophotometric analysis with 190–1100 nm wavelength range. Full function testing including scanning and multi-parameter analysis.

• 190–1100 nm range
• Wavelength scanning
• Multi-parameter testing
• Photometric & quantitative modes

Infrared Oil Analyzer LH-S600

Supports perchloroethylene extraction with built-in Android tablet and 10-inch touchscreen for intuitive operation.

• Built-in Android tablet
• 10" touch screen
• HDMI output
• Perchloroethylene extraction

Multi-parameter Water Analyzer 5B-3B (V10)

Multi-parameter 5B-3B (V10)

Comprehensive water quality analyzer for COD, ammonia, phosphorus, nitrogen, and heavy metals with dual-block digestion system.

• Dual-block digestion
• Multi-parameter testing
• High throughput
• Compact design

Portable DO Meter LH-E200

Optical dissolved oxygen meter with 5-meter cable, digital electrode, and IP68 waterproof rating. Range: 0–20 mg/L.

• 5m cable length
• Digital optical sensor
• IP68 waterproof
• Zero point calibration

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Why Choose LH Water Analysis?

Our commitment to innovation, accuracy, and customer support makes us a trusted partner in water quality analysis across industries.

High Accuracy

Our instruments deliver precise, repeatable results essential for regulatory compliance and process control.

Fast Results

Rapid testing protocols reduce turnaround time—COD results in under 20 minutes, BOD with flexible incubation.

Multi-parameter

Single instruments that test COD, BOD, ammonia, phosphorus, heavy metals, and more—reducing equipment needs.

Global Support

Products used worldwide with technical documentation, training, and service support available in multiple languages.

Frequently Asked Questions

Get answers to common questions about our products and services.

What is the difference between BOD and COD testing?

BOD (Biochemical Oxygen Demand) measures the amount of oxygen consumed by microorganisms breaking down organic matter over 5 days. COD (Chemical Oxygen Demand) uses chemical oxidation to measure total organic content in under 20 minutes, making it faster but less biologically specific.

How accurate are your COD analyzers?

Our COD analyzers provide highly accurate results with precision within ±5% of standard methods. They are calibrated using NIST-traceable standards and validated against laboratory reference methods.

Do you offer portable water testing kits?

Yes, we offer several portable solutions including the LH-P700 handheld multi-parameter tester and vial test kits for field use. These are ideal for on-site monitoring and emergency response.

Can your instruments connect to LIMS or cloud platforms?

Many of our advanced models support wireless data transmission, USB export, and cloud integration. The LH-BOD606 and LH-S700 models include direct cloud upload capabilities via Wi-Fi.

What kind of technical support do you provide?

We offer comprehensive technical support including installation guidance, user training, troubleshooting, and remote diagnostics. Our team responds to inquiries within 24 hours.

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