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Linshang High-Precision Multifunctional Home TDS Water Quality Tester Pen Conductivity Meter Drinking Water Test LS311

•Moisture/water quality detector

Linshang High-Precision Multifunctional Home TDS Water Quality Tester Pen Conductivity Meter Drinking Water Test LS311

CN¥253.00

SKU: 100355321612

Status:In Stock (55)

ID: 100283805006

Weight: 150.00 g

Dims:201x68x40 mm

Specifications

Category: Water quality testing pen
Measurable parameters: COD, Heavy metal, bacteria, Total Dissolved Solids

Variants / Sale Attributes

Model: LS311 can measure nine indicators / National metrology certification

Package Contents

Product x1, instruction manual x1, certificate of conformity x1

Product Description

Product Specifications

Overview

Brand: Linshang
Model: LS311 Multi-Parameter Water Quality Tester

Multi-parameter water quality detection for drinking water, well water, purified water, seawater aquaculture, aquarium water, and surface water.

Intelligent scoring system with nine key parameters.

Additional details

One-button water quality rating with 4-level color-coded display: Blue (Excellent), Green (Good), Yellow (Average), Red (Poor).

Salinity (Salt concentration)

Hardness (Calcium and magnesium ion content)

Specific Gravity (Relative density compared to pure water)

Additional details

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TDS (Total Dissolved Solids

minerals, metals)

COD (Chemical Oxygen Demand

nitrites, sulfides, organic pollutants)

TOC (Total Organic Carbon

bacteria, pesticides, organic residues)

Electrical Conductivity (Minerals, metals)

Additional details

UV275 (Ultraviolet absorption at 275 nm: residual chlorine, humic substances)

Temperature (Water temperature)

Additional details

COD: 0–100 mg/L
TOC: 0–100 mg/L
UV275: 0–1.0 au/cm
TDS: 0–2000 ppm
Electrical Conductivity: 0–4000 µS/cm
Salinity: 0–26%
Hardness: 0–1000 ppm
Specific Gravity: 0.9800–1.2000
Temperature: 0–50 °C
COD: 0.01 mg/L
TOC: 0.01 mg/L
UV275: 0.001 au/cm
TDS: 1 ppm
Electrical Conductivity: 1 µS/cm
Salinity: 0.01%
Hardness: 1 ppm
Specific Gravity: 0.0001
Temperature: 0.1 °C
COD: ±0.5 mg/L (0–5 mg/L), ±10% of reading (5–100 mg/L)
TOC: ±0.5 mg/L (0–5 mg/L), ±10% of reading (5–100 mg/L)
UV275: ±0.01 au/cm (0–0.1 au/cm), ±10% of reading (0.1–1.0 au/cm)
TDS: ±5 ppm (0–100 ppm), ±5% of reading (100–2000 ppm)
Electrical Conductivity: ±10 µS/cm (0–200 µS/cm), ±5% of reading (200–4000 µS/cm)
Salinity: ±0.25% (0–5%), ±5% of reading (5–15%), ±10% of reading (15–26%)
Temperature: ±2 °C
Soft Water: 0–60 °dH (0–3.4 ppm), smooth taste, no scale
Medium Soft Water: 60–120 °dH (3.4–6.7 ppm), ideal for most city water
Medium Hard Water: 120–180 °dH (6.7–10.1 ppm), slight scale formation
Hard Water: 180–300 °dH (10.1–16.8 ppm), noticeable scale, poor soap effect
Very Hard Water: >300 °dH (>16.8 ppm), severe scale, requires softening

1 °dH = 17.8 ppm

Based on GB5749-2022 Drinking Water Hygiene Standard

Additional details

Score ranges: 90–100 (Excellent), 80–90 (Good), 60–80 (Average), 0–60 (Poor)
Color indication: Blue, Green, Yellow, Red

Intelligent saltwater detection and automatic switching to salinity display mode

Supports detection of bacteria, viruses, pesticides, heavy metals, and organic pollutants beyond TDS measurement

High-precision ultrasonic probe manufacturing

IP67 waterproof probe and battery cover with sealing ring

High-precision UV275 LED sensor

Temperature compensation algorithm for accurate measurements

Low water level detection line

Portable pen-style design with 2 AAA alkaline batteries

High sensitivity temperature sensor and probe for precise readings

1.14-inch TFT color screen with 240 x 135 pixels resolution

Color backlight for easy reading

2 x AAA alkaline batteries

Additional details

Size: 157 x 37 x 14 mm
Weight: Approx. 68 g
Measurement temperature range: 0–50 °C
Storage temperature range: -10–60 °C
Humidity: 0–85% RH (non-condensing)

Complies with GB5749-2022, GBT5750-2023, JJG821-2005, JJG376-2007, JJG761-2016 standards

CE certification

Calibration certificate included (TOC RSD-0.45)

LS311 Water Quality Tester x1

User Manual x1

Batteries (AAA) x2

Carrying Case x1

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