Types of Interface Boards to Operate Zirconia O2 Sensors

What Types of Interface Boards Can You Use With SST Zirconia O2 Sensors?

In order to operate any of SST’s Zirconia O2 Sensors, you will require an interface board which provides the electronics necessary to power and control the zirconium dioxide oxygen sensors.

Alternatively, if you would rather have a complete solution, have a complete solution, the Oxygen Measurement System, OXY-Flex or OXY-Comm may better suit your needs. When choosing the option you require, you should consider the following;

  1. O₂ measurement range; 0.1-25% or 0.1-100%
  2. Output requirements; digital (RS485 Modbus or RS232) or analogue (4-20mA or 0-10Vdc)
  3. Location; cable length is important; to maintain the correct sensor heater voltage and minimize noise pick up, SST recommends keeping the cable length between the sensor and interface board as short as possible.
  4. Convenience; do you want an “off-the-shelf” solution or configure the equipment yourself? If you want to design the board yourself. Please refer to our Zirconia Sensor Software and Hardware Design Guide

Types of Interface Boards

There a number of options available which enable you to power and control SST’s range of zirconium dioxide o2 sensors; interface board or a complete solution. The following gives a brief overview of each type of interface PCB.

OXY-LC Interface

The OXY-LC Interface Board has a built-in pressure sensor for barometric pressure compensation and offers the following specifications;

  • Supply voltage: 8 to 28Vdc (RS485 variant) or 20 to 28Vdc (analogue variants)
  • O₂ measurement range: 0.1 to 100% (RS485 variant) and 0.1 to 25% or 0.1 to 100% (analogue variants)
  • Operating temperature range: -30⁰C to +70⁰C
  • Output options: RS485, 0-10V or 4 to 20mA
  • Termination: PCB screw terminals
o2 probe

O2I-Flex Interface

The O2I-FLEX has externally triggered automatic or manual calibration. Calibration can also be initiated via an on-board push button switch. The O2I-FLEX offers the following specifications;

  • Supply voltage:24Vdc 10%
  • O₂ measurement range: 0.1 to 100% (RS232 variant) and 0.1 to 25% or 0.1 to 100% (analogue variants)
  • Operating temperature range: -10⁰C to +70⁰C
  • Output options: RS232, 0-10V or 4 to 20mA
  • Termination: Removable polarised screw terminals
O2I FLEX

Oxygen Measurement System Complete Solution

The Oxygen Measurement System has a built in pressure sensor for barometric pressure compensation and is used in combustion control including oil, gas and biomass boiler applications.

  • Supply voltage: 8 to 28Vdc (RS485 variant) or 20 to 28Vdc (analogue variants)
  • O₂ measurement range: 0.1 to 100% (RS485 variant) and 0.1 to 25% or 0.1 to 100% (analogue variants)
  • Operating temperature range: -30⁰C to +70⁰C
  • Output options: RS485, 0-10V or 4 to 20mA
  • Termination: PCB screw terminals
Zirconia Oxygen Sensor System

OXY-Flex Complete Solution

The OXY-Flex has externally triggered automatic or manual calibration and has an IP65 rated housing. It is used in combustion control including oil, gas and biomass boiler applications. Long probe lengths are ideal for thicker walled flues.

  • Supply voltage: 24Vdc 10%
  • O₂ measurement range: 0.1 to 100% (RS485 variant) and 0.1 to 25% or 0.1 to 100% (analogue variants)
  • Operating temperature range (electronics): -10⁰C to +85⁰C
  • Gas temperature range (at probe tip): -100⁰C to +250⁰C (standard variant), or -100⁰C to +400⁰C (high temp variant)
  • Output options: RS232, 0-10Vdc or 4 to 20mA
  • Termination: Amphenol Ecomate C016 30C006 100 12
OXY-Flex Oxygen Analyser

OXY-Comm Complete Solution

The OXY-COMM can be calibrated through Modbus. The housing is IP65 rated and also has a built in pressure sensor for barometric pressure compensation. The OXY-COMM is used in refrigerated/controlled atmosphere transportation (“Reefer”) containers. Fire prevention in facilities such as server rooms, or document storage and also protecting historical artefacts against oxidation.

  • Supply voltage: 8 to 15Vdc
  • O₂ measurement range: 0.1 to 100%
  • Operating temperature range: -40⁰C to +60⁰C
  • Output options: RS485
  • Termination: Brad Harrison style 4-pin M12 connector
OXY-COMM

For more information on any of SST’s Zirconia O2 Sensors, interface electronics or complete oxygen sensing solutions, please contact us and to discuss your requirements.

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