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Pressure Gauges

H2 Pressure Gauge - LEO-Record

KELLER Pressure AG

  • Digital gauge with logging function for hydrogen applications
  • Gold-plated diaphragm for minimal H2 diffusion
  • Non-volatile memory for high data security
  • Optional intrinsically safe version for explosive environments
  • Wide range of pressure units to choose from

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Description Vendor

The LEO-Record-H2 is a digital gauge with logging functionality specifically designed for hydrogen applications. It features a stainless steel housing with increased nickel content to reduce embrittlement, and a gold-plated diaphragm to minimize hydrogen diffusion. The device records both pressure and temperature data, with non-volatile memory ensuring data security. It has a long battery life due to low power consumption and an optional intrinsically safe version for explosive environments. The gauge offers a wide range of pressure units, supports 5 user-defined units, and allows simple zero point calibration via buttons. It is suitable for applications in manufacturing, transport, containment/storage, and petrol stations. The device has an accuracy of ±0.05%FS and a total error band of ±0.1%FS, with pressure ranges from -1...3 bar to 0...1000 bar. It also includes a digital LC display with configurable pressure units and a recording function that can be started and stopped manually. The LEO-Record-H2 is available in two variants: one with a rubber cover for additional protection and one with a standard design. It is CE-conformant and meets electromagnetic compatibility standards. The device is suitable for use in harsh environments and can be integrated with software like PressureSuite Desktop for data visualization and export.

Use Cases

  • Manufacturing / production
  • Transport
  • Containment / storage
  • Petrol stations

Capabilities

  • Pressure and temperature recording
  • Non-volatile memory
  • Long battery life
  • Wide range of pressure units
  • 5 user-defined pressure units configurable via software
  • Simple zero point calibration via buttons
  • Record function can be started and stopped manually
  • Various recording functions can be configured
  • Data storage with timestamp
  • Configurable pressure units
  • Intrinsically safe version for use in explosive environments
KELLER Pressure AG KELLER Pressure AG, a Swiss company founded by Hannes W. Keller with over 40 years of experience in pressure measurement, has developed a dedicated hydrogen product line offering accurate, reliable pressure sensors specifically optimized for H2 applications, leveraging isolated piezoresistive pressure sensor technology invented by the company's founder. The company's hydrogen pressure instruments -- including the 23SX-H2 and 33X-Ei-H2 series relative pressure transmitters -- feature low embrittlement rates due to increased nickel content in the stainless steel used, combined with gold-plated diaphragms that reduce hydrogen diffusion to a minimum (as hydrogen can hardly penetrate the gold layer), all built as fully welded sensors without internal seals for maximum reliability across typical hydrogen application pressure ranges of 0-2 bar to 0-1000 bar. KELLER's hydrogen sensor portfolio is compatible with the EC79 standard for automotive applications, with the LEO-Record-H2 and intrinsically safe LEO-Record-Ei-H2 digital pressure gauges providing long service life and high accuracy for hydrogen generation and production, transportation, hydrogen refueling station monitoring, and hydrogen containment/storage applications, connectable via RS485 interface for configuration and data logging. Serving customers including hydrogen-powered racing applications and off-grid hydrogen fuel/generator managed service providers like Hydrologiq, KELLER Pressure continues exhibiting its 'Swiss Made' precision pressure sensor technology at major hydrogen industry trade shows, positioning the company's decades of piezoresistive measurement expertise to serve the growing hydrogen mobility, production, and storage infrastructure market.
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