Fabric Negative-ion Concentration Tester

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Fabric Negative-ion Concentration Testers typically detect the amount of negative ions generated by fabrics based on principles such as triboelectricity, release from natural minerals, or photocatalysis. During the test, the fabric sample is placed in a specific environment, simulating real-world usage scenarios (such as friction and light exposure) to stimulate the fabric to release negative ions. The instrument uses a highly sensitive negative ion sensor to measure the number of negative ions released by the fabric in real time and accurately, and automatically calculates the average value to ensure the accuracy and reliability of the test results.

Applications

Functional Textile R&D: Assesses air-purifying, health-enhancing, and antimicrobial fabrics.

Quality Control: Verifies compliance with negative-ion standards for medical textiles, bedding, and apparel.

Certification Laboratories: Provides data for GB/T 30128-2013 certification.

Standards

GB/T 30128-2013: Textiles – Test and Evaluation of Negative Ion Generation

Features

Dual Friction Disc Design:

Upper Static Disc: Diameter 100 ±0.5 mm (fixed).

Lower Dynamic Disc: Diameter 200 ±0.5 mm (rotating at 93 r/min).

Capacitive Ion Sensor: High-sensitivity detection of activated negative ions.

Technical Parameters

Parameter	Specification
Control Mode	Automatic (PLC)
Ion Collection Method	Capacitive Suction (Mobility >0.15 cm²/(V·s))
Measurement Range	Range 1: 0–20.000 units/cm³ Range 2: 0–200.000 units/cm³ Range 3: 0–2.000.000 units/cm³
Resolution	10 units/cm³
Friction Disc Speed	93 ±1 r/min (Adjustable)
Applied Pressure	7.5 ±0.2 N
Test Chamber Size	300 ±2 mm × 560 ±2 mm × 210 ±2 mm
Power Supply	AC 220V ±10%, 50Hz
Dimensions (L×W×H)	600 mm × 620 mm × 520 mm
Net Weight	55 kg

Test Procedures

1. Preparation Stage

Equipment Check

Connect the ground wire to ensure instrument grounding safety;

Confirm power supply stability, turn on the instrument switch, and warm up for 1 minute.

Sample Preparation

Cut the sample according to standard (e.g., A4 size), distinguishing the test surface (usually the skin-contact surface);

Ensure the sample is free of impurities and radioactive material contamination.

2. Parameter Settings

Mode Selection

Select “Negative Ion Detection Mode” on the operation panel;

Set the ion mobility (default ≥0.15 cm²/(V・s), meeting product accuracy requirements).

Range and Pressure Adjustment

Select the range according to the sample type (0-20.000/200.000/2.000.000 units/cm³);

Adjust the test pressure to 7.5±0.2 N (adaptable to different fabric types).

3. Testing Process (Simulated Friction + Ion Detection)

Sample Fixation

Lay the sample flat on the test stage, start the PLC to control the friction disc (rotation speed 93±1 r/min), simulating the friction state in actual use.

Ion Detection

Activate the capacitive attraction ion acquisition module to capture negative ions released during the friction process;

The instrument records the ion concentration in real time and generates a time-varying curve (supporting dynamic analysis).

4. Data Reading and Calibration

Record after reading stabilizes

Wait for the value to stabilize (display fluctuation ≤ ±2), then read the current negative ion concentration;

If "1" is displayed, switch to a higher range.

Calibration (if necessary)

Press and hold the "RE-ZERO" button for 3-5 seconds until the displayed value is between -0.01 and 0.01. then complete the zeroing.

5. End and Data Processing

Stop Testing

Turn off the friction system and remove the sample;

Save the real-time data curve and automatically calculate the average value.

Result Calculation

Repeat the test on 3 groups of samples and take the average value as the final result (unit: ions/cm³);

Data must comply with the requirements of GB/T 30128-2013 standard.

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