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High-precision pressure transmitters

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In the 23SXc series high-precision pressure transmitters, temperature dependencies and non-linearity are precisely compensated for by means of a mathematical model in the microcontroller. With the CANopen interface, Keller offers a highly accurate pressure transmitter that is optimally suited for a wide variety of automation solutions. The fully welded construction without internal seals is suitable for dynamic applications. Only stainless steel is in contact with the media.

General features

  • CAN interface according to ISO 11898-2
  • >1,8 kHz sampling rate, all CiA bit rates are supported
  • Measured variables: Multiple pressure and temperature units available
  • Excellent long-term stability
  • Accuracy: ±0,1 % FS
  • Total error band: ±0,25 % FS @ -10 °C to +80 °C
  • Pressure ranges: 0 bar...0,16 bar to 0...1000 bar

Technology

  • Insulated and encapsulated piezoresistive pressure sensor
  • Fully welded construction without internal seals
  • High-quality pressure transducers and proven mathematical compensation
  • Based on technology from the well-known 33X series with the highest level of accuracy

Typical applications

  • Engine test benches
  • Industrial applications
  • Automation technology
  • Mobile hydraulics

CANopen features

  • Support of 11-bit and 29-bit CAN-Identifiers
  • Supported CANopen application layer according to CiA 301 v. 4.2
  • Supported CANopen device profile CiA 404 (v. 1.2) for measuring devices
  • Supports all CiA 301 bit rates: 10 kbit/s to 1 Mbit/s and auto baud
  • Minimum PDO cycle time of 1 ms
  • Digital filter: Moving and repeating average according to CiA 404
  • Selectable units:
    • Pressure: bar, Pa, psi, mHg, mmH2O, atm, at
    • Temperature: °C, °F, K
  • Adjustable scaling factor and offset
  • Object for recalibration date
  • Auto-zero function
  • Auto start mode (NMT startup) e.g. for operation without managing controller
  • Pressure and temperature thresholds for range check freely selectable

More details are available in the data sheet.