Drinking Water Turbidity Testing Instrument for Safe Water Quality Verification HM-SXT1

Product Introduction

Ensuring safe drinking water requires continuous turbidity monitoring at every stage of the treatment and distribution process. Elevated turbidity levels can signal filtration failure, pipe corrosion, or contamination events that threaten public health. The HM-SXT1 provides water treatment operators and quality managers with an objective, portable tool for verifying that treated water meets regulatory standards such as GB 5749 for drinking water and CJ 3020 for source water quality.

Using the 860nm nephelometric (90° scatter) method per ISO 7027, the HM-SXT1 measures turbidity from 0 to 2000 NTU with 0.001 NTU resolution. The near-infrared wavelength minimizes interference from dissolved organic colorants — a common challenge when testing surface water sources — enabling more accurate readings than broadband visible-light alternatives. With indication error of ±6% and repeatability within 0.5%, the instrument produces the consistent data needed for both operational decision-making and regulatory reporting.

The IP65-rated housing withstands the humid, splash-prone environment of water treatment facilities, while the 8000mAh battery supports a full shift of testing on a single charge. At 0.59 kg with a 4.3-inch touchscreen, the HM-SXT1 can be carried through treatment stages — from raw water intake through sedimentation, filtration, and distribution points — without interrupting workflow. Data is stored on 16 GB internal memory and transferred via Wi-Fi, Bluetooth, or USB for compliance documentation and trend analysis.

Applications

• Raw water intake monitoring: assessing source water turbidity before treatment begins

• Sedimentation basin verification: confirming settled water clarity meets filtration requirements

• Filter effluent checking: monitoring filtered water turbidity to validate filter performance

• Distribution network surveillance: testing tap water turbidity at consumer endpoints

• Source water quality assessment: verifying compliance with CJ 3020 for drinking water sources

• Bottled water production: confirming product water clarity before filling

Functional Performance

1. 860nm nephelometric measurement per ISO 7027 eliminates color interference from humic substances in surface water sources

2. 0–2000 NTU range with 0.001 NTU resolution covers both low-turbidity filtered water and higher-range source water

3. Indication error ±6% and repeatability ≤0.5% support GB 5749 and CJ 3020 compliance reporting

4. Zero drift ±0.5% FS/30 min ensures measurement stability during extended treatment plant inspections

5. IP65 protection rating for operation in humid treatment plant environments

6. 8000mAh battery with USB-C 5V 2.1A (BC2.1) charging enables full-shift field deployment

7. 4.3-inch HD touchscreen with Android interface simplifies operation for plant technicians

8. 16 GB storage for over 10,000 records with Wi-Fi, Bluetooth, and USB data transfer

9. Multi-point calibration, zero-point calibration, and built-in standards for on-site verification

10. Selectable units (NTU, FAU, FNU, FTU, EBC, ASBC) with bilingual Chinese/English operation

Main Parameters

Technical Parameters

FAQ

Q1: Why is turbidity testing important for drinking water safety?

A: Turbidity indicates the concentration of suspended particles in water. High turbidity can shield microorganisms from disinfection, signal filtration system failures, and indicate pipe corrosion or contamination events. Regulatory standards such as GB 5749 mandate turbidity limits for drinking water because elevated levels correlate directly with increased health risk. The HM-SXT1 provides the quantitative NTU measurements needed to verify that treated water remains within safe limits at every stage from source to tap.

Q2: How does the 860nm LED source improve drinking water turbidity measurements?

A: Surface water sources often contain dissolved organic matter like humic acids that impart a yellow-brown color to the water. Broadband visible-light turbidity meters can misinterpret this color as particle scatter, producing inflated readings. The 860nm near-infrared wavelength specified by ISO 7027 is absorbed minimally by dissolved organics, so the HM-SXT1 measures only true particulate scatter. This results in more accurate turbidity values for source water and early-stage treatment water where color interference is most pronounced.

Q3: Can the HM-SXT1 be used for GB 5749 compliance testing?

A: Yes. The HM-SXT1 complies with ISO 7027 and HJ 1075-2019, which are recognized measurement standards for drinking water turbidity determination in China. Its 0.001 NTU resolution detects turbidity well below the GB 5749 limit of 1 NTU for filtered water, and the ±6% indication error provides the measurement confidence required for regulatory compliance documentation. The instrument also supports standards JJG 880-2006, CJ 3020, and GB/T 14848.

Q4: How do I calibrate the HM-SXT1 for daily water treatment plant use?

A: The HM-SXT1 supports continuous multi-point turbidity calibration using standard formazin solutions, zero-point calibration for baseline correction, and built-in calibration standards for quick daily verification. The one-key calibration function accessible through the touchscreen allows operators to perform calibration checks between measurement rounds without disrupting the testing workflow. Calibration data is stored internally for traceability during regulatory audits.

Q5: What is the battery life during a typical plant inspection shift?

A: The 8000mAh lithium battery is designed to support a full shift of continuous measurement at a water treatment facility on a single charge. USB-C 5V 2.1A charging with BC2.1 protocol support allows convenient recharging using standard phone chargers or power banks between shifts. The instrument can also operate while charging, so it never needs to be taken out of service during critical monitoring periods.

Q6: How does the HM-SXT1 compare to visual turbidity comparison methods?

A: Visual methods such as Jackson candle turbidimeters or turbidity tubes rely on operator judgment and produce subjective, non-repeatable results. The HM-SXT1 provides objective electronic measurements with repeatability of ≤0.5% and indication error of ±6%, delivering quantitative data that can be documented and trended over time. This is essential for regulatory compliance, where auditable measurement records are required rather than subjective visual assessments.

Article address:https://www.hmwatertesting.cn/suspended-solids-turbidity-meter/drinking-water-turbidity-testing.html