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HRI Sensor


High Resolution Interface (HRI) is a universal sensor that is compatible with a wide range of meters, including:

  • Single-jet
  • Multi-jet
  • Piston meters with dry-dial and semi-dry registers in glass-copper or plastic housing

The HRI can be retrofitted on all Sensus meters built since 2008 that are pre-equipped with an HRI modulator.

The HRI is available in two versions:

  1. The HRI-A pulse unit is a high resolution pulser which detects the flow direction.
  2. The HRI-B data unit is an electronic register with a data interface which supports both hard-wired M-Bus systems and battery-driven MiniBus devices such as mobile meter reading systems. The HRI-B can alternatively be used as a pulse type with configurable pulse output.

The HRI is more than an extension of a simple sensor; it has been expanded to provide a reliable data source for reading a conventional meter remotely. It fulfills today’s requirements for data interrogation and remote transmission.

Typical applications include:

  • Load profiles via a fixed network using M-Bus or via radio, telephone or GSM modem
  • Industrial application (e.g., dosing)
  • Remote reading of flow rate and cumulative flow using a frequency converter
  • Leakage detection when connected to a data logger
  • Generation and transmission of flow profiles using a data logger and GSM modem. The design of the HRI allows the  system to be installed in extreme conditions, such as flooded meter pits.

Benefits to you

  • Retrofits to a wide range of existing and compatible meters
  • Detects flow direction
  • Does not influence the meter’s performance
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  • Load-free sensor detection of the pointer‘s rotation of pre-equipped meters
  • No influence to the meter performance
  • Can be retrofitted to pre-equipped meters
  • Detects flow direction
  • Suitable for a wide range of meters
  • Electronic non-bouncing contact output
  • Ultra-long battery life
  • Hermetically sealed housing (IP68)
  • Nonmagnetic principle


HRI-A (pulse unit)

  • Provides a reliable pulse output and direction signal or cable cut functionality

HRI-B (data unit)

  • Provides a data output with ID and counter reading
  • ID and Counter reading can be synchronized to the mechanical meter
  • Serial output acc. the M-Bus standard
  • Configuration over wire
  • A pulse output can be used
  • Allows external feeding to release internal battery

For more information about this product, please download the data sheet.

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