LFY-249 protective clothing penetration time tester
The main purpose
It is used to determine the anti-acid and alkali penetration performance of breathable and non-breathable acid-base protective clothing, expressed by the anti-acid penetration time t.
working principle
Conductive method: Spread the acid-proof clothing sample flat between two metal electrodes, drop a test solution on the sample and start timing. When the test solution passes through the sample, the circuit is turned on, an electrical signal is sent out, and the time is recorded. The period from when the test solution is dropped into the sample to the appearance of the signal is called the anti-acid penetration time of the sample.
Indicator method: Stick the sample flat on the bottom of the glass tube and fix it tightly, inject the test solution from the upper end of the glass tube and start timing. When the test solution penetrates the sample, the test paper under the sample will change color. The period from when the test solution is injected to when the test paper changes color is called the anti-acid penetration time of the sample.
Technical index
1. Sample size: 100mm×100mm
2. Test solution: 0.1mL (conductivity method) or 10mm high (indicator method) Bring your own 50mL beaker
3. Test conditions: temperature: 17～30℃, relative humidity: (65±2)% RH
Applicable standards
GB 24539-2021 Protective clothing—Chemical protective clothing, Appendix G
It is used to determine the anti-acid and alkali penetration performance of breathable and non-breathable acid-base protective clothing, expressed by the anti-acid penetration time t.
working principle
Conductive method: Spread the acid-proof clothing sample flat between two metal electrodes, drop a test solution on the sample and start timing. When the test solution passes through the sample, the circuit is turned on, an electrical signal is sent out, and the time is recorded. The period from when the test solution is dropped into the sample to the appearance of the signal is called the anti-acid penetration time of the sample.
Indicator method: Stick the sample flat on the bottom of the glass tube and fix it tightly, inject the test solution from the upper end of the glass tube and start timing. When the test solution penetrates the sample, the test paper under the sample will change color. The period from when the test solution is injected to when the test paper changes color is called the anti-acid penetration time of the sample.
Technical index
1. Sample size: 100mm×100mm
2. Test solution: 0.1mL (conductivity method) or 10mm high (indicator method) Bring your own 50mL beaker
3. Test conditions: temperature: 17～30℃, relative humidity: (65±2)% RH
Applicable standards
GB 24539-2021 Protective clothing—Chemical protective clothing, Appendix G
