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Pressure Transmitters

Piezoresistive Pressure Transmitters - Series 21Y

KELLER Pressure AG

  • Compact design for space-critical applications
  • Robust stainless steel housing
  • High long term stability
  • Industrial applications
  • Food industry

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Description Vendor

The Series 21Y Piezoresistive Pressure Transmitters are compact, robust, and designed for space-critical applications. These transmitters feature a piezoresistive sensor that is insulated and encapsulated, ensuring high accuracy and reliability. They are fully welded with no internal seals, providing a direct analog signal path with high bandwidth. The transmitters are available in a wide range of pressure ranges, from 0...2.5 bar to 0...1000 bar, and offer high long-term stability. They are compensated over the entire temperature range of -10...80 °C, with an accuracy of ±0.5%FS and a total error band of ±1.5%FS. The transmitters are suitable for various applications including industrial, HVAC, and food industry settings. They are available with different electrical connections, including 2-wire and 3-wire options, and support a range of environmental conditions, including protection ratings of IP67 and IP65. The transmitters are designed for use with various pressure connections, including G1/4 male, G1/8 male, 7/16-20UNF male, and 1/4-18NPT. They are also available with different materials for sealing and oil filling, and can be customized for specific applications.

Use Cases

  • Industrial applications
  • Heat pumps
  • Air-conditioning technology
  • Food industry

Capabilities

  • Compact design for space-critical applications
  • Robust stainless steel housing
  • High long term stability
  • Direct analog signal path with high bandwidth
  • Insulated and encapsulated piezoresistive pressure sensor
  • Fully welded design with no internal seals
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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