The LPG 400 is a high-precision pneumatic pressure calibrator from Leyro Instruments, built around a modular MEMS-based sensor platform that accommodates up to two internal precision sensors. Designed for calibration laboratories, industrial metrology services, and R&D environments, it delivers reference-grade accuracy with full automation capability via RS-232, USB, and Ethernet interfaces.

What accuracy and stability does the LPG 400 achieve?

Depending on the installed sensor range, accuracy spans from 0.3% FS down to 0.01% FS, with control stability rated at 0.005% FS of the active pressure range. The MEMS sensor technology provides long-term stability and a response time of approximately 10 ms, enabling both static calibration and dynamic pressure step testing. Each unit can operate with one or two internal sensors, selectable via the touchscreen interface without hardware changes.

What pressure modes and ranges are available?

The LPG 400 supports three measurement modes: relative pressure up to 210 bar, absolute pressure up to 50 bar, and differential pressure from ±10 mbar to ±500 mbar. A built-in barometric reference (800–1200 mbar absolute) enables seamless switching between gauge and absolute pressure readings. The unit accepts clean dry non-corrosive gases and non-viscous liquids, with overpressure protection rated at 150% of the largest installed range.

How does the LPG 400 integrate into automated calibration workflows?

The 7-inch color touchscreen provides a six-digit display for actual value, reference value, and measurements, with 23 standard pressure units plus one user-defined unit. For automated operation, the RS-232, USB, and LAN interfaces support remote command and data logging with CSV export. Optional calibration software adds automatic test certificate generation and transmitter calibration routines, making the LPG 400 suitable for high-throughput calibration service environments.