HM-SXT1 Nephelometric Turbidity Meter

I. Product Description

Turbidity is a key water quality indicator that measures the concentration of suspended particulate matter in water, and its value directly affects the sensory characteristics and safety of water. The HM-SXT1 turbidity meter adopts the single-wavelength 860nm scattered light measurement method for precise turbidity determination. The instrument integrates precision optics with intelligent technology, offering features including one-key calibration, rapid response, large-screen display, and data storage. Its lightweight and portable body, long battery life, and high protection rating make it well suited for demanding field environments. It is primarily used in drinking water treatment, environmental monitoring, wastewater treatment, food and beverage production, and aquaculture, providing an efficient and professional on-site water quality testing solution for water quality management.

II. Detection Principle

The scattered light detection method uses a stable light source beam passing through a sample cell containing the test sample. A sensor positioned at a 90° angle to the incident light measures the intensity of scattered light. The intensity of scattered light produced when the beam enters the sample is proportional to the turbidity of the sample within a certain concentration range.

III. Applicable Standards

1. HJ 1075-2019 Water Quality — Determination of Turbidity — Turbidimetric Method

2. ISO 7027 Water Quality — Determination of Turbidity

3. JJG 880-2006 Turbidity Meters

4. GB 5749 Standards for Drinking Water Quality

5. CJ 3020 Water Quality Standard for Drinking Water Sources

6. GB/T 14848 Quality Standard for Ground Water

IV. Application Scope

1. Environmental monitoring: assessing turbidity of rivers, lakes, and groundwater bodies

2. Drinking water industry: routine inspection of water treatment processes (from raw water to filtered water) and distribution network quality

3. Wastewater treatment plants and discharging enterprises: monitoring turbidity of influent, effluent, and treatment stages

4. Aquaculture: maintaining environmental health of aquaculture water bodies

5. Food and beverage, pharmaceutical industries: monitoring quality of process water and cleaning water

V. Product Features

1. Android-Based Operating System: Intuitive interface with user-friendly operation.

2. 4.3-Inch HD Touchscreen: Visual graphical operation pages for improved operational efficiency.

3. High-Reliability LED Light Source: Imported LED requiring no warm-up with stable long-term performance.

4. Large Photovoltaic Cell: 10 × 10 mm sensor delivering high sensitivity and low detection limit.

5. Large-Capacity Data Storage: 16 GB internal memory capable of storing over 10,000 records; optional Bluetooth printer for on-site result printing.

6. Multiple Connectivity Options: Wi-Fi and Bluetooth functionality with USB port for direct PC connection and fast batch data upload.

7. Waterproof Design: Body with waterproof capability; detection chamber resistant to 0.5 ml liquid intrusion.

8. Convenient Power Supply: Standard USB-C 5V 2.1A supporting BC2.1 charging protocol, compatible with third-party chargers, cables, and power banks; intelligent lithium battery charging management for extended continuous operation.

9. Average Measurement Mode: Automatic range switching for optimized accuracy across the measurement span.

10. Flexible Display Units: Default display unit NTU; switchable to FAU, FNU, FTU, EBC, and ASBC.

11. Comprehensive Calibration: Supports continuous multi-point turbidity calibration, zero-point calibration, and built-in calibration standards.

12. Bilingual Interface: Chinese/English bilingual operating system.

VI. Technical Specifications

Measurement Parameters

Environmental & Protection

Power & Physical

VII. Frequently Asked Questions (FAQ)

Q1: What measurement principle does the HM-SXT1 turbidity meter use?

A: The HM-SXT1 employs the nephelometric (90° scattered light) method with an 860nm near-infrared LED source. A detector positioned at a right angle to the incident light beam measures the intensity of light scattered by suspended particles in the sample. This method complies with ISO 7027 and provides accurate readings from 0 to 2000 NTU with minimal interference from sample color.

Q2: What is the measurement range and resolution of the HM-SXT1?

A: The HM-SXT1 covers a measurement range of 0 to 2000 NTU with a resolution of 0.001 NTU. The instrument supports automatic range switching and provides an indication error of ±6% with repeatability of ≤0.5%, making it suitable for both low-turbidity drinking water and higher-range wastewater applications.

Q3: Is the HM-SXT1 suitable for outdoor and field use?

A: Yes. The HM-SXT1 features an IP65 protection rating, making it resistant to dust and water ingress. It is powered by an 8000mAh lithium battery via USB-C (5V 2.1A, BC2.1 protocol), providing extended operation time for field deployments. The compact dimensions (246 × 59.4 × 84 mm) and weight of 0.59 kg further enhance portability for on-site testing.

Q4: How is the HM-SXT1 calibrated?

A: The HM-SXT1 supports continuous multi-point turbidity calibration, zero-point calibration, and built-in calibration standards. The calibration procedure follows the requirements of HJ 1075-2019 and JJG 880-2006. Users can perform one-key calibration through the touchscreen interface, and the instrument stores calibration data internally for traceability.

Q5: What industry standards does the HM-SXT1 comply with?

A: The HM-SXT1 is designed in accordance with HJ 1075-2019 (Water Quality — Determination of Turbidity), ISO 7027 (Water Quality — Determination of Turbidity), and JJG 880-2006 (Verification Regulation of Turbidity Meters). Its measurements support compliance assessment against GB 5749 (Standards for Drinking Water Quality), CJ 3020 (Water Quality Standard for Drinking Water Sources), and GB/T 14848 (Quality Standard for Ground Water).

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