Home
>
Products
>
Paper, Packaging & Print
>
Packaging Inspection Solution
Micro-Leak Non-Destructive Seal Tester

Micro-Leak Non-Destructive Seal Tester

Model: ST-MLST02
Ultimate Vacuum: Down to 10 Pa
Vacuum Accuracy: Class 0.25
Detectable Leak Hole Size: 1–2 μm (customizable up to 5 μm)

Fully automatic vacuum seal tester Packaging bottle can and bag air tightness tester Automotive parts camera harness waterproof tester Air tightness leak tester;Vacuum Decay leak tester

Product Description

Applicable Specimens

Packaging bags, Infusion bags, Glass bottles, Plastic bottles, Vials, Ampoules

Product Introduction

The ST-MLST02 micro-leak non-destructive seal tester is specially designed for non-destructive seal integrity testing of injectable products such as ampoules, vials, pre-filled syringes and infusion bags, as well as rigid and flexible packaging containers. We can provide customized testing solutions and tailor-made test chambers according to customers’ specific injectable products, fully meeting leakage detection requirements for solid and liquid contents.

2. Product Features

Equipped with a 7-inch color touch screen and intelligent data processing system; real-time test curve display and automatic data statistics.
Dual-sensor measurement principle: vacuum decay (standard) and positive pressure decay (optional), used to detect pressure and time variations.
Adopts trace-level pressure sensors to capture tiny pressure fluctuations.
Imported pneumatic components and pressure sensors ensure stable and reliable performance.
Supports multi-stage preset vacuum levels for gradient testing.
Fully automatic test process: the unit automatically terminates testing and judges pass/fail results.
Multiple switchable pressure units: kPa, psi, mbar, mmHg.
Adjustable vacuum duration, test duration and stabilization time; parameters stored in database to guarantee consistent test conditions.
Split two-piece test chamber design: lower chamber for sample loading, upper cover for sealing.
Pneumatic automatic clamping of upper cover to maintain constant internal pressure.
Double fluororubber sealing rings installed between upper and lower chambers.
Low-elasticity, high-hardness rubber coating at the bottom of pneumatic compression mechanism of upper cover.
Built-in mini thermal printer and universal USB port for data export and transmission.
Fully GMP-compliant system, supporting user management, 4-level permission control and data audit trail functions.

3. Working Principle

This non-destructive seal tester operates based on ASTM F2338 Vacuum Decay Method.

Place the specimen into a tightly fitted customized test chamber (custom chambers deliver higher resolution due to minimal clearance between chamber and sample). The external vacuum pump evacuates the chamber to a preset vacuum level and then stops automatically. After a stabilization period, the absolute/vacuum sensor continuously monitors the pressure rise (vacuum decay) within a set time window. If the pressure rise exceeds the threshold, the sample is determined to have leakage.

4. Technical Specifications

Parameter	Specification
Test Method	Vacuum Decay Method (Standard); Pressure Decay Method (Optional & Customizable)
Ultimate Vacuum	Down to 10 Pa
Vacuum Accuracy	Class 0.25
Detectable Leak Hole Size	1–2 μm (customizable up to 5 μm)
Minimum Detection Sensitivity	0.01 sccm (equivalent to 1 μm leak aperture)
Test Chamber	Custom size & type based on customer samples
Test Output	Qualitative: Pass / Fail Quantitative: Leakage flow rate, leak rate, equivalent hole diameter
Chamber Clamping Mode	Pneumatic
Compressed Air Supply	0.6 MPa ~ 0.7 MPa (air compressor to be supplied by user)
Overall Dimension	430mm (L) × 320mm (W) × 480mm (H)
Power Supply	220V, 50Hz
Net Weight	Approx. 26 kg