FORTEST
Over 30 years of expertise from this Italian leak testing specialist. The K Series with proprietary Dual Absolute technology delivers high-precision leak inspection.
K Series Leak Test Equipment
FORTEST is an Italian leak test specialist with over 30 years of proven expertise. The latest K Series is based on the Absolute Pressure Decay principle, combining measurement precision with advanced design. All models achieve high-precision measurement of 0.5% RDG + 3 DGT with resolution of 0.001 to 0.1 mbar.
The standout feature is the proprietary patented Dual Absolute technology. Installed in the K7090, this technology fuses the simplicity of absolute pressure decay with the high sensitivity of differential methods, offering four switchable measurement modes (Absolute Decay, Classic Differential, Dual Absolute, Zero Central) for optimal leak testing. With a 5.7-inch color touchscreen and Industry 4.0 compatibility.
K Series Product Lineup
Choose from 5 models to match your application and scale.
K7990 Standard
Highly versatile absolute pressure decay leak tester. Covers 5 pressure ranges (-1 to 15 bar) for all industries including automotive, medical, hydraulic, and aerospace. 5.7-inch touchscreen, 300 test programs. Only 4 kg.
K7890 Dual Channel
Two independent measurement channels in the same compact body as the K7990. Test two workpieces simultaneously to double productivity. 5.7-inch color touchscreen with dynamic LED bar as standard.
K7090 Dual Absolute
Proprietary patented Dual Absolute technology. Switch between 4 measurement modes: Absolute Decay, Classic Differential, Dual Absolute, and Zero Central. Top-tier model covering 0 to 15 bar range, eliminating drawbacks of traditional differential methods.
K5990 Mini
High measurement performance packed into a compact 160x140x180mm, 2.5 kg body. 3.5-inch touchscreen with backlit keyboard. Ideal entry model for manual test stations and medical device inspection.
K3990 Micro Compact
Ultra-compact 110x110x110mm design weighing just 1 kg. Ideal for integration into automated machines. Low-consumption micro valves enable high-speed testing for workpieces up to 50 cc. Built-in 3.5-inch color display.
Model Comparison
Select the optimal model for your application.
| K7090 | K7990 | K7890 | K5990 | K3990 | |
|---|---|---|---|---|---|
| Position | Top-tier Dual Absolute | Standard | Dual Channel | Compact Entry | Micro Compact |
| Method | Dual Absolute 4-mode switching | Absolute Pressure Decay | Absolute Pressure Decay | Absolute Pressure Decay | Absolute Pressure Decay |
| Channels | 1ch | 1ch | 2ch | 1ch | 1ch |
| Pressure Range | -1 to 15 bar | -1 to 15 bar | -1 to 15 bar | -1 to 10 bar | -1 to 10 bar |
| Accuracy (delta-p) | 0.5% RDG + 3 DGT (all models) | ||||
| delta-p Resolution | 0.001 - 0.1 mbar | 0.001 - 0.01 mbar | 0.001 - 0.1 mbar | 0.001 - 0.01 mbar | 0.001 - 0.01 mbar |
| Flow Measurement | 0 - 10 cc/min (all models) | ||||
| Volume Measurement | 0 - 500 cc | 0 - 500 cc | 0 - 500 cc | -- | -- |
| Display | 5.7" (800x480) | 5.7" (800x480) | 5.7" (800x480) | 3.5" (480x480) | 3.5" (320x240) |
| Test Programs | 300 | 300 | 300 | 100 | 100 |
| Standard Comms | RS232x2 / RS485 USB / BLE / Wi-Fi | RS232x2 / RS485 USB / BLE | RS232x2 / RS485 USB / BLE | RS232x2 / RS485 USB | RS232 / RS485 USB / BLE |
| Industrial Ethernet | Profinet / EtherNet/IP / EtherCAT (all models, optional) | ||||
| Size | 220x140x250mm | 220x140x250mm | 220x140x250mm | 160x140x180mm | 110x110x110mm |
| Weight | 4 kg | 4 kg | 4 kg | 2.5 kg | 1 kg |
| Recommended Use | High-sensitivity testing Differential replacement | All industries General testing | Simultaneous 2-piece testing Productivity boost | Manual testing Medical / packaging | Machine integration Small-volume parts |
K Series Key Specifications (K7990 baseline)
- Measurement MethodAbsolute Pressure Decay
- Proprietary TechnologyDual Absolute (K7090 only)
- Measurement Accuracy (delta-p)0.5% RDG + 3 DGT (all models)
- delta-p Resolution0.001 - 0.1 mbar (varies by range)
- Pressure Range-1 to 15 bar (5 ranges: 0-1, 1-2, 2-6, 6-10, 10-15 bar)
- Flow Measurement0 - 10 cc/min (accuracy: +/-1% RDG + 0.03 cc/min)
- Volume Measurement0 - 500 cc (accuracy: +/-1% RDG + 2 cc)
- Display5.7-inch color touchscreen (800x480 px)
- Test ProgramsUp to 300 programs
- Standard CommunicationsRS232x2 / RS485 / USB (Master + Slave) / Bluetooth
- Optional CommunicationsEthernet / Wi-Fi / Profinet / EtherNet/IP / EtherCAT
- Dimensions220x140x250 mm (K3990: 110x110x110 mm)
- Weight4 kg (K3990: 1 kg)
- Operating Temperature5 - 40°C
- IndustriesAutomotive, medical, hydraulic, appliance, e-mobility, aerospace, defense, packaging
- ManufacturerFORTEST (Italy, 30+ years of expertise)
Applications & Use Cases
Automotive & E-Mobility
High-precision verification of airtightness for engine components, brake systems, fuel systems, and battery packs. The K7990's 5-range support covers a wide range of automotive parts quality assurance from low to high pressure.
Medical Devices & Packaging
Supports rigorous leak testing for biomedical devices and packaging products. The stable measurement performance of Dual Absolute technology (K7090) meets the strict airtightness standards required for medical equipment.
Automated Lines & High-Speed Production
The K3990 Micro Compact (110x110x110mm) is ideal for integration into automated machines. The K7890 dual channel enables simultaneous 2-workpiece testing. Profinet compatible for Industry 4.0 environment integration.
Frequently Asked Questions
It is FORTEST's proprietary patented technology that combines the strengths of both the absolute pressure decay method and the differential pressure method. Equipped on the K7090, it eliminates the issues of conventional differential pressure methods by using four measurement modes selectively.
The measurement accuracy (Δp) of all K series models is 0.5% RDG + 3 DGT, with a resolution of 0.001 to 0.1 mbar (varying by range). Flow measurement supports 0–10 cc/min, and volume measurement supports 0–500 cc.
Yes. All models come standard with RS232, RS485, and USB, and optionally support industrial Ethernet such as Profinet, EtherNet/IP, and EtherCAT. The K3990 has an ultra-compact design ideal for integration into automated machines.
Want to Learn More About the FORTEST K Series?
Please feel free to consult us about leak test equipment selection and implementation. A 10-day free trial is also available.