OEM 4-20mA Transmitter for NDIR Gas Sensors 

       (Methane/Carbon dioxide)

Description:

The Cirius X OEM 4-20mA transmitter is an extremely flexible transmitter for NDIR gas sensors providing a robust linear 4-20mA output in response to signals from standard NDIR gas sensors. All sensor driving, signal extraction and linearisation is performed on-board with calibration and configuration accessed by a menu driven sequence using 3 pushbuttons or via the RS232 port. The 2-line LCD display shows the gas concentration and units under normal operation, fault diagnostics under fault conditions and interactive text under pushbutton operation for calibration. The pushbuttons are disabled if the display is removed, enabling tamper-proof running. Sensor connections to the Cirius X are made by 3-way and 4-way crimp EH connectors, segregating the sensor supply from the signal lines. Connections for the input power and 4-20mA source output are via screw terminals and an earth spade terminal is provided along with an earth bonding pad for ease of earth connections.

Features:

  1) Wide power supply voltage range                                             
  2) Robust linear 4-20mA output stage
  3) Fully configurable for a wide range of NDIR gas sensors           
  4) Comprehensive RS232 communications
  5) Extensive fault monitoring                
  6) Input power and output signal polarity protection
  7) Detachable 2 line LCD display with switchable backlight
  8) Menu driven pushbutton calibration
  9) Small size

10) Designed for fixed head systems
11) Optional plug in Hall Effect switch panel for “through the glass” calibration
12) Wide operating temperature range
13) Earth contact pad and earth spade terminal
14) Designed in accordance with the SIL specification