OXY-FLEX-0 - SST Sensing Ltd

FEATURES

• High accuracy linear output

• Externally triggered automatic or manual calibration

• Can be calibrated in fresh air (20.7% O2) or to any

other known O2 concentration

• Selectable output filtering allows adaptive, fast and

dynamic or slow and stable output

OUTPUT VALUES

Oxygen range (analogue output)2 0.11—25% O2

or 0.11—100% O2

Oxygen range (RS232 output) 0.11 and 100% O2

Accuracy after calibration3, 4 1% O2

Repeatability after calibration3 0.5% O2

Output resolution

Analogue 4—20mA 0.01mA

Analogue 0—10VDC 0.01V

Digital RS232 0.01% O2

Response time < 15s

Warm up time (prior to sensor operation) 60s

Output stabilisation time ~ 180s

Need help? Ask the expert

Tel: + 44 (0)1236 459 020

and ask for “Technical”

BENEFITS

• Cycling 3.3VDC logic output allows direct monitoring of the

O2 sensor pump cycle for diagnostic purposes

• No reference gas required

TECHNICAL SPECIFICATIONS

Supply voltage 24VDC ± 10%

Supply current 500mA max. at 24VDC

Digital output RS232

Analogue output 4—20mA; load 600Ω max.

or 0—10VDC; load 10kΩ min.

Housing temperature limits

Storage: -10°C to +85°C

Operating: -10°C to +85°C

Permissible gas temperatures (probe tip)

Standard: -100°C to +250°C

High: -100°C to +400°C

Gas flow rate 0 to 10 m/s

Permissible acceleration

Repetitive 5g

Incidental 30g

1) Prolonged operation below 0.1% O2 can damage the sensing element.

2) Range selectable by altering the position of the jumper links on the PCB; refer to PCB Layout on page 3.

3) Assuming barometric pressure (BP) remains constant.

4) As the O2 sensor measures the partial pressure of oxygen (PPO2) within the measurement gas deviations in the BP from

that present during calibration will cause readout errors proportional to the change. EG. if the sensor reads 21% O2 at

1013.25mbar and the BP increases by 1%, the sensor readout will also increase by 1% to 21.21% O2.

NOTES

DATA SHEET

Zirconia O2 Sensors

OXY-Flex Oxygen Analyser

Supply

Voltage

Housing Gas Temp Digital

Output

Response

Time

Analogue

Output

OUTLINE DRAWING AND MOUNTING INFORMATION

All dimensions shown in mm. Tolerances = ±1mm.

ELECTRICAL INTERFACE

Housing: Amphenol Ecomate C016 30C006 100 12

Mating Connector: Binder 99-4218-00-07

NOTE: Mating connector also supplied.

NOTE: Output pins 5 and 6 are both referenced to the supply GND (pin 2). Due to high current flow in the supply GND, when

monitoring the 0—10VDC output (pin 6) it is recommended that a separate GND wire for the measurement system is taken from pin 2. This

removes errors due to voltage drops in the power supply connections.

Assignment of output pins 5 and 6 selectable by altering the position of the jumper links on the PCB; see PCB LAYOUT below.

CIRCUIT DIAGRAM AND PCB LAYOUT

Pin Assignment

1 24VDC±10%

2 GND

3 Calibrate

4 Cycle

5 4—20mA / RS232 Tx (see Note)

6 0—10VDC / RS232 Rx (see Note)

CENTRE Housing / Probe Earth

General Note: SST Sensing Ltd. reserves the right to make changes to product specifications without notice or liability.

All information is subject to SST Sensing Ltd.'s own data and considered accurate at time of going to print.

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CAUTION

Do not exceed maximum ratings and ensure sensor(s) are operated in

accordance with their requirements.

Carefully follow all wiring instructions. Incorrect wiring can cause

permanent damage to the device.

Zirconium dioxide sensors are damaged by the presence of silicone.

Vapours (organic silicone compounds) from RTV rubbers and sealants

are known to poison oxygen sensors and MUST be avoided.

Do NOT use chemical cleaning agents.

Failure to comply with these instructions may result in product

damage.

INFORMATION

As customer applications are outside of SST Sensing Ltd.’s control, the

information provided is given without legal responsibility. Customers should

test under their own conditions to ensure that the equipment is suitable for

their intended application.

For technical assistance or advice, please email:

technical@sstsensing.com

ORDER INFORMATION

Generate your specific part number using the convention shown below. Use only those letters and numbers that correspond to the options

you require — omit those you do not. Include the “OXY-FLEX” prefix.

Probe

Length

Gas

Temperature

220mm

BLANK

-100 °C

to +250°C

400mm

-100 °C

to +400°C

O X Y - F L E X - X - X