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SWE-73-L Small Case Loop-Powered Panel Meter

The SWE-73-L is an affordable digital indicator, self-powered through a 4-20 mA input. It features built-in safety circuits for overload protection. Users can select from linear, square, or square root transfer functions, or customise up to 20 points for accurate recalculations. It displays readings on a 4-digit red LED, with adjustable decimal points. An optional SPDT relay adds functionality, suitable for driving bulb lamps and sound signals but not for control tasks. Configuration is simple via an IR remote controller, active when the input current surpasses 10 mA.

SWE 73 L Panel Meter Product Parameters

  • Output Signal: Optional 1 x SPDT relay 30V/500 mA for signalization.
  • Accuracy: 0.1% @25°C ± one digit.
  • Electrical Connections: Powered from measurement line, min. 3.5 mA current, max. 7V drop.
  • Process Connections: Input current 4-20 mA, overload-protected, limited to about 50 mA.
  • Media Compatibility: Operating temp. 0°C to +50°C, storage temp. -10°C to +70°C.
  • Special Features: Red LED display, EEPROM memory, IP 65/20 protection, panel mounting.

Product Highlights

The SWE73L is a cost-effective and user-friendly digital indicator designed for simplicity. This device features a single 4-20 mA current input that not only powers the device but also incorporates safety circuits to protect the internal electronics from overload. With the ability to recalculate the measured current using predefined transfer functions such as linear, square, and square root, or a fully customisable user characteristic with up to 20 points, this indicator offers flexibility in displaying accurate results. The measurement results are conveniently shown on a 4-digit red LED display, which can range from -999 to 9999, with the option to define the decimal point position. For added functionality, the SWE73L can be equipped with an optional SPDT relay. It’s important to note that while the output can drive a bulb lamp or a sound signalling device, it is not suitable for controlling purposes. Configuration of the device can be easily accomplished using an IR remote controller, with an additional LED signalling when the input current exceeds 10 mA to ensure user safety.


  • Low-cost loop-powered meter in a small case
  • Measurement input 4-20 mA
  • Optional alarm output available
  • Signal peak value detection
  • All parameters are freely programmable from the remote control

To download the latest datasheet click here: SWE 73 L

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