Leak testers that catch what QC would miss.
Featured Products
Defender Pressure & Vacuum Decay Tester
Pressure or vacuum decay tester at a price that doesn't hurt. 64-bit processor, 24-bit transducer, EtherNet/IP for talking to Allen-Bradley. The "we need a leak tester but not a six-figure one" answer.
Key Specifications:
- Processor: 64-bit with 24-bit transducer
- Touchscreen: 7-inch color display
- Pressure Range: Vacuum to 100 PSIG
UltraFlow V3 Mass Flow Leak Tester
Mass flow plus pressure decay in one box. Reads at 1000/second, electronic pressure reg, and flow sensors that span 0–200 sccm up to 0–300 SLPM. The pick for large-volume parts and short cycle times.
Key Specifications:
- Flow Range: 0-200 sccm to 0-300 SLPM
- Processor: 64-bit ultra-speed
- Touchscreen: 7-inch high resolution
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Guardian Multi-Channel Leak Tester
Multi-channel leak tester — pressure decay, vacuum decay, mass flow, or differential, your choice. 10-inch touchscreen, runs standalone or as a slave under a PLC. Per-channel cost is unusually low for what you get.
Key Specifications:
- Processor: 64-bit with 24-bit transducer
- Touchscreen: 10-inch with light/dark modes
- Test Methods: Pressure/vacuum decay, mass flow, differential
700 Series Benchtop Leak Tester
Benchtop tester for lab, R&D, and manual stations. Pick pressure decay (700PD), differential (700DP), or mass flow (700MF). Built to take abuse and stay repeatable. Bilingual display, CSV export, optional EtherNet/IP.
Key Specifications:
- Models: 700PD, 700DP, 700MF
- Processor: 64-bit with 24-bit sensors
- Display: Large, bilingual multi-channel
Stealth Compact Leak Test Module
Four and a half inches wide. That's the pitch. Pressure or vacuum decay, differential, or occlusion. Drops into clean rooms, automotive cells, and anywhere a full-size tester won't fit.
Key Specifications:
- Width: Only 4.5 inches
- Configuration: Pressure/vacuum decay, differential, occlusion
- Design: Modular, mountable anywhere
About LeakMaster
LeakMaster is in Princeton, Indiana. They've been building leak testers for twenty-plus years and they only build leak testers — pressure decay, vacuum decay, mass flow, differential, occlusion. That focus is the whole pitch.
The big names will quote you a tester at numbers that make your CFO call. LeakMaster comes in at a fraction of that and reads on par or better — 64-bit processor, 24-bit transducer, repeatability that holds up on the line. The Stealth module fits where the competition won't. The Guardian runs four channels for less than most single-channel testers list.
Automotive, medical, electronics, aerospace — wherever sealed parts come off a line, this gear shows up. If you're currently quoting a different brand, ask us for a comparison.
Core Capabilities
Resolution where it counts
64-bit processor, 24-bit sensor. Catches small leaks across a wide pressure range without false positives.
Pick your method
Pressure decay, vacuum decay, mass flow, differential, occlusion, trace gas. One vendor, every common method.
Talks to the line
EtherNet/IP, Slave Mode, built-in data collection. Drops into existing factory networks without translation.
ISO 17025 calibrated
Leak standards and instrument calibration in-house. Traceable, documented, audit-ready.
Need a Leak Tester?
Tell us the part, the leak rate, and the cycle time. We'll spec the box.