The Omega Engineering HHP350 series is a high-performance, handheld digital manometer with many features found in more expensive units. The HHP351 has an accuracy of 0.05% FS, independent of temperature, while the HHP352 improves that to 0.025%. Both models can display 11 different pressure scales as well as one user-defined scale. Min/max capture, display damping, backlit display, display hold, auto off, and leak test functions are all standard features. A record feature allows manual or automatic storage of up to 240 readings for future recall. Both models include NIST traceable calibration certificates.