Standards:

ISO 16975-3:2017 – Respiratory Protective Devices — Selection, Use, and Maintenance — Part 3: Fit Testing Procedures

Applications:

Product Information:

The Protective Mask Leak Tester is a portable device designed to detect the service performance and applicability of protective masks, and provide leaks and service performance testing for specified nuclear, biological and chemical defense (NBCD) / chemical, biological and radiation defense (CBR-D) masks and components without the need for the operator to wear a mask. PMLT can be set for timing by minutes, fully integrated in a rigid transportable box. Through a universal clamping assembly, inflated mask seals and fixture adapters, the PMLT Protective Mask Leak Tester can virtually measure any type of gas masks in the world. Lightweight plastic heads are available in 2 sizes and are easily interchangeable with different sizes of masks. PMLT protective mask leak tester utilizes advanced transistor circuit and menu-driven touch pad to provide alphanumeric display.

Applications:

Overall Mask Leakage Test : Mask leakage is measured while the mask is challenged with an aerosol, with or without a plugged filter canister attached.

Leakage Isolation Test: Leaks normally invisible to the naked eye are easily isolated so that repair/replacement decisions can be made.

Wind exhaust Valve Test: In the wind exhaust valve test, suspended particles as a function in the mask test and isolation detect the airflow leakage under strictly controlled conditions.

Drink Tube Flow Test: Tube blockage can be measured.

Drink Tube Valve Leakage Test: The drink tube valve is tested for leakage under controlled pressure.

Benefits and Features:

Ease of Use

Self-Diagnostics

Portability

Data Management

Menu-Driven

Interchangeable Heads

Universal Clamping

Controlled Aerosol vs. Ambient Air

Universal Power Supply

Custom Software

Leak Isolation

Visual/Audible Alarms

Rugged Shippable Case

Low Maintenance

Technical Parameters:

FAQ:

1. What is this product?

The Respirator Fit Tester evaluates the fit and seal of protective respirators on a wearer’s face. It detects potential leakage points to ensure that the respirator provides the intended protection against airborne particles, gases, or aerosols.

2. What is it used for?

It is used to verify the proper fit of N95/FFP respirators, full-face masks, and other tight-fitting protective equipment. Ensures compliance with occupational safety standards and confirms that individual users receive adequate respiratory protection.

3. How does it work?

The device measures inward leakage using particle counting or controlled test aerosols. The wearer performs a series of exercises while the tester continuously monitors air inside the mask. The system calculates a fit factor, indicating the mask’s sealing efficiency and identifying improper fit or facial seal issues.

4. Why is it important?

A poor-fitting respirator compromises protection, increasing the risk of exposure to hazardous aerosols or contaminants. Fit testing is critical for occupational safety, regulatory compliance, and user confidence in high-risk environments.