PTI 250RS - This research-grade interferometer features λ/6000 (1σ) repeatability, and is equipped with FlashPhase™ for robust measurements in environments with air turbulence and/or vibration. The fully configurable ZYGO MetroPro software makes it ideal for research and quality control use.

PTI 250P - Designed for production use (with vibration isolation). Features λ/6000 (1σ) repeatability. The Zygo Production software uses MetroPro algorithms and has a fixed-format interface for simplified operator use.

PTI 250F - Designed for production use. Features λ/2000 (1σ) repeatability. Equipped with FlashPhase™ for robust measurements in noisy production environments, without vibration isolation the Zygo Production software uses MetroPro algorithms and has a fixed-format interface for simplified operator use.

Two basic Graphical User Interfaces (GUI) are available. For research and quality control applications, the PTI 250RS employs ZYGO's versatile and fully configurable MetroPro software. For production environments, the PTI 250P and PTI 250F have a fixed-format display for ease of use. Providing the required numeric result for surface control along with a full 3D colour surface map and live video image. All measurement results are calculated using MetroPro algorithms for optimum accuracy and correlation.