2025 Lspec 7100 Online Turbidity Analyzer

• Customization: Available
• After-sales Service: 1 Year
• Detection Principle: 90° Light Scattering Method
• Model NO.: LSPEC 7100
• Detection Accuracy: 0-40 Ntu: ±2% or ±0.02 (Whichev
• Repeatability: Better Than ±1% of Reading
• Resolution: 0.0001 Ntu
• Signal Averaging: Options: None, 6, 30, 60, 90
• Power Requirements: 24V DC
• Operating Temperature: 0ºC to 45ºC
• Sample Temperature: 0ºC to 40ºC
• Sample Flow Rate: 200 to 750 Ml/Min
• Protection Level: IP64
• Calibration Method: Stable Formaldehyde
• Digital Communication: RS485, Standard Modbus Proto
• Inlet Connection: NPT 1/4 Internal Thread
• Outlet Connection: NPT 1/2 Internal Thread
• Transport Package: Wooden Box
• Specification: 230*226*450mm
• Trademark: Resound
• Origin: China

Product Description

Detailed Photos

Product Parameters

Product Introduction
The LSPEC 7100 Online Turbidity Analyzer utilizes the 90-degree light scattering method. It employs a highly stable tungsten lamp as the light source, which is collimated into parallel light through a lens. This light enters the turbidity analyzer vertically and interacts with a sensor submerged in the water. The sensor detects the light scattered at a 90° angle after passing through the suspended particles in the water. The turbidity monitoring and analysis are achieved through linear fitting of the light intensity to the turbidity values of the water sample.
Features

1. Built-in Continuous Flow Bubble Elimination Structure: Eliminates bubbles in the water sample, ensuring stable water flow in the detection area and reducing interference from bubbles and flow fluctuations.
2. 90° Scatter Light Reception Design: This design minimizes interference from stray light and secondary scattering, with 90° scattered light having minimal impact from particle size variations, thus providing good linearity in low turbidity detection.
3. Tungsten Lamp Light Source: Utilizes visible light, which is approximately 9 times more sensitive to scattering than infrared light, leading to higher detection sensitivity.
4. Compatible with ALPHAPEC 700 Control Terminal: Offers integrated control and display capabilities for enhanced user interaction.
5. Simple Calibration Operation: Calibration can be easily performed with a formaldehyde solution, guided by a visual calibration program. Two-point calibration at 0 and 20 NTU is recommended, with the option for custom calibration between 0 and 40 NTU.
6. Hydrostatic Sampling and Optional Peristaltic Pump Sampling: Allows for flexible sampling methods to suit various operational needs.
7. User-Defined Sampling Intervals: Users can set sampling intervals to prolong the instrument's lifespan.
8. Concentration Alarm Function: The instrument is equipped with a concentration alarm feature, allowing users to set threshold values for alerts.

Parameters

Item	Technical Specification
Detection Principle	90° light scattering method
Detection Range	0.0000 to 99.9999 NTU
Detection Accuracy	0-40 NTU: ±2% or ±0.02 (whichever is greater); 40-100 NTU: ±5%
Repeatability	Better than ±1% of reading
Resolution	0.0001 NTU
Signal Averaging	Options: None, 6, 30, 60, 90
Power Requirements	24V DC
Operating Temperature	0ºC to 45ºC
Sample Temperature	0ºC to 40ºC
Sample Flow Rate	200 to 750 ml/min
Protection Level	IP64
Calibration Method	Stable formaldehyde
Digital Communication	RS485, standard MODBUS protocol
Inlet Connection	NPT 1/4 internal thread
Outlet Connection	NPT 1/2 internal thread
Communication Cable	Default: 1.5 m (customizable)
Dimensions	230 mm × 226 mm × 450 mm
Installation Method	Wall-mounted installation
Sampling Pump	Peristaltic pump (optional)

 

Technical Principle

The turbidity measurement methods are primarily divided into transmission turbidity method and scattering turbidity method. The transmission method has a simple structure, but the changes in transmitted light caused by slight turbidity variations are minimal, leading to low sensitivity. This method requires a very high detector resolution and is not suitable for low turbidity detection. In contrast, the scattering turbidity method offers higher precision and sensitivity for low turbidity measurements.
When a light beam of a specific wavelength enters a water sample, turbidity substances in the sample cause the light to scatter. At low turbidity levels, the intensity of scattered light has a linear relationship with the turbidity of the water sample. By measuring the intensity of scattered light at a direction perpendicular to the incident light, the turbidity of the water sample can be determined. Using 90° scattering detection avoids multiple scattering phenomena and is least sensitive to particle shape, thereby improving measurement accuracy.

Application Areas

Monitoring turbidity before and after filtration, during sedimentation, and in the final output water at drinking water treatment plants; quality monitoring of circulating cooling water and effluent from activated carbon filters in industrial processes; water quality monitoring in municipal pipeline networks; and monitoring the quality of water in regional secondary supply systems.
 

Company Profile

Resound Photoelectric Technology Research Institute (LSRPTR)

Resound Photoelectric Technology Research Institute (LSRPTR), also known as Resound Research Institute, is affiliated with China Haiheng International Trade Group Co., Ltd. (CHHGC). As an investment attraction enterprise in Zhongyuan Science and Technology City and a construction unit of the Zhongyuan Aurora Laboratory, the institute is committed to the industrialization of scientific and technological achievements, guided by market demand.
 

Technical Cooperation

Resound Research Institute has established technical cooperation with numerous well-known domestic and foreign universities, research institutes, and enterprise platforms, including:

 

Tsinghua University
Lanzhou University
Zhengzhou University
Altai State Technical University of Russia
Northwestern Polytechnical University
Chinese Academy of Engineering
Henan Academy of Sciences
China Electronics Technology Group
CGN Group
Xiamen University
Henan University
National University
University of Electronic Science and Technology of China
Chinese Academy of Sciences
China Academy of Engineering Physics
China Shipbuilding Group
China Electronics Group
Henan Inspection Group

 

Research and Development Fields

* Applications of Micro-Electromechanical and Lithography Technology
* Optoelectronics and Spectroscopy Technology
* High-Power Laser and Device Preparation Technology
* Nuclear Instrument and Emergency Equipment System Applications
 

Introducing Advanced Technologies and Products

Resound Research Institute continuously introduces advanced new technologies and products in industrial application scenarios such as market supervision, public safety, environmental monitoring, and science, education, research, and production. This has led to the formation of a domestically produced high-end scientific equipment industry base that integrates design, research and
development, production, sales, and services. This base drives the iteration of downstream industry technology, enhances the transformation and industrialization level of scientific and technological achievements, and provides technological sources for innovative development.