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The OXY-LC Oxygen Sensor Interface Electronics provides the necessary electronics to power and control SST’s range of zirconium dioxide (ZrO₂) sensors.

The OXY-LC Oxygen Sensor offers various user configurable output variants RS485, PWM, 0-10Vdc and 4-20mA. The RS485 Modbus RTU Protocol offers various benefits over other output types but most importantly it allows complete control of the sensor operation and access to all available information including sensor diagnostics, barometric pressure and pressure sensor temperature.

The adaptive software filtering which enables it to provide a fast response coupled with a stable oxygen output. In addition to this, the OXY-LC Oxygen sensor interface electronics offers a high accuracy linear output for all of our zirconium dioxide oxygen sensors.

The built in pressure sensor allows for barometric pressure compensation and the interface mounted screw terminals offers easy wiring with reverse voltage and transient overvoltage.

TECHNICAL SPECIFICATIONS
Supply voltage
RS485 variant: 8—28VDC
Analogue variants: 20—28VDC
Supply current 600mA max. at 24VDC
1.2A max. at 12VDC
Digital output RS485 (Modbus RTU)
PWM
Analogue output 4—20mA; load 600Ω max
0—10VDC; load 10kΩ min
Temperature limits
Storage: -40°C to +85°C
Operating: 30°C to +70°C
Operating pressure limits 260—1260mbar absolute

OUTPUT VALUES
Oxygen range (analogue output) 0.1—25% O2
0.1—100% O2
Oxygen range (Modbus RTU) 0.1—100% O2
Accuracy after calibration 0.5% O2
Repeatability after calibration 0.01% O2
Response time (step 10—90%)
Fast response sensor connected: 4s
Standard response sensor connected: 15s
Initial warm up time (till stable output) 5—10mins
Output inactive start up delay (heater warm up)
From OFF to ON mode: 60s
From Standby to ON mode (RS485 only): 20s