Optitest IQ — Multifunction Air Leak Test Instrument
The Optitest IQ is the top of the Optitest range: a single instrument covering absolute and differential pressure testing, mass flow, vacuum, volume determination, occlusion and burst, with up to eight tests linked in sequence and no PLC required to sequence them.
What It Adds Over the Base Optitest
- Differential and absolute pressure — differential testing resolves small leaks on larger volumes far better than absolute measurement alone.
- Pressure range to 50 barG, against 10 barG on the base model.
- Six test types in one instrument — pressure, mass flow, vacuum, volume determination, occlusion and burst.
- Sequential linking of up to eight tests without a PLC, which removes a common integration cost.
- Assignable gross leak detection per programme, rather than a fixed default.
- Deep I/O — 8 in / 8 out expandable to 40, with around 250 output and over 100 input functions.
- 127 freely programmable test programmes.
When the IQ Is the Right Choice
The IQ makes sense when one bench has to do several jobs: a part that needs a pressure test and a flow check, a line testing multiple variants against different programmes, or a test sequence you would otherwise build in a PLC. It also covers applications the base model cannot reach at all — anything above 10 barG, anything needing vacuum or occlusion testing, and volume determination.
A Note on Accuracy
The IQ measures to 1% of measuring span on absolute pressure and 2% on differential and mass flow, with 1% of full scale repeatability. The base Optitest is tighter at 0.3% of full scale. That is not a fault in the IQ; it reflects a wider-range, multi-function instrument against a single-purpose one. If your application is purely absolute pressure decay within 10 barG, the base model is both cheaper and more accurate. If you need the breadth, the IQ is the right tool.
▶ Optitest vs Optitest IQ — Technical Specifications
| Specification | Optitest | Optitest IQ |
|---|---|---|
| Measurement System | Absolute pressure | Differential & Absolute pressure |
| Pressure Range | -1 barG to 10 barG | -1 barG to 50 barG |
| Accuracy | 0.3% of full scale | 1% of measuring span (absolute); 2% (differential/mass flow) |
| Repeatability | 0.3% of full scale | 1% of full scale |
| Test Types | Absolute pressure leak testing | Absolute pressure, differential pressure, mass flow, vacuum, volume determination, occlusion, burst, sequential linking (up to 8, no PLC) |
| Gross Leak Detection | Default on all programmes + 15% of test pressure | Assignable per programme; fully customisable |
| Programmable I/O | 8 digital in / 8 digital out, expandable to 40 | 8 digital in / 8 digital out, expandable to 40 — with ~250 output and 100+ input functions |
| Communication | LAN, 5× USB, 2× RS232, HDMI, VGA, PROFIBUS/PROFINET, Digital I/O | RS232, USB-A, USB-B, PROFIBUS/PROFINET, Digital I/O, Ethernet |
| Barcode Compatibility | Yes | Yes |
| Programme Slots | 127 (default 20, configurable) | 127 freely programmable |
| Operating Temperature | 10°C to 40°C | 10°C to 45°C |
Integration and Support
Communication is via RS232, USB-A, USB-B, PROFIBUS/PROFINET, digital I/O and Ethernet, with barcode support for programme selection. Our integration team can specify, install and commission the instrument into an existing line, and it can serve as a functional replacement for legacy equipment — see the migration guide on the air leak testing page.
Frequently Asked Questions
Complex Testing Requirements?
