|Measurement Principle||Electrochemical reduction of oxygen|
|Measuring Range||10 ppb to 40 ppm (DO) or 0.2 to 1000 mbar (pO₂)|
|Accuracy at 25 °C||± 2 %|
|Drift at Room Temperature||< 1 % per week|
|Sensor Cap||Delivered with Optiflow FDA|
|Oxygen Consumption||Ca. 20 ng/h in air at 25 °C|
|Temperature Sensor||NTC 22 kOhm|
|Configurable Values||DO: mbar; %-sat; %-vol; µg/l; mg/l; ppb/ppm (gas); ppb/ppm (dissolved oxygen); Temperature: °C, °F, K|
|Surface Quality of Steel||Ra < 0.4 µm (N5)|
|Electrode system||Silver platinum combination|
|Analog Interface 1||4 to 20 mA for DO, programmable|
|Analog Interface 2||4 to 20 mA for Temp., programmable|
|Analog Interface 1 and 2||Galvanically not isolated; pulse width modulation 3.5 kHz|
|Baud Rate||4800, 9600, 19200, 38400, 57600,115200 bd|
|Polarization Voltage and Time||-670 ± 50 mV, ≥ 2 hours|
|Operating Voltage||7 to 30 VDC max. 150 mW|
|Response Time t98%||< 60 s at 25 °C|
|Certificate||Yes, with parameter settings and materials used|
|Operating Temperature Range||Analog interface: 0 to 110 °C; Digital interface: 0 to 130 °C|
|Pressure Range bar g||0 to 4 bar|
|Max CO2 Partial Pressure||0.01 bar|
|Required Flow||≥ 0.03 m/s|
|Automatic Polarization||Yes, max. 2 hours stabilisation time|
Specification SheetOxyFerm FDA Arc 425
Brochure - BioPharmaInnovative solutions for process analytics in biotechnological and pharmaceutical industries.
Manual - Polarographic Dissolved Oxygen Arc SensorsDetailed operating instructions for the polarographic dissolved oxygen Arc sensors.
How do I communicate with an Arc sensor?Arc sensors have a built-in micro-transmitter within the sensor. ArcAir software is a powerful tool to access data, configure and calibrate the sensor. This can be done with Bluetooth wireless communication or with a wired connection directly to a PC.
Which wireless adapter do I need for my sensor?Hamilton makes two Bluetooth wireless adapters - Wi 1G and Wi 2G. The Wi 1G is designed for VisiFerm sensors using the ECS (nA) signal. The Wi 2G is better choice with Arc sensors.
Does temperature impact my oxygen measurement?Yes, in a closed system, gas phase temperature is directly proportional to pressure and therefore measured oxygen content. In solution, temperature is inversely proportional to dissolved oxygen content.
ArcAir Software Connectivity OptionsCommunication between Arc sensors and ArcAir Software can be accomplished via wired or wireless (Bluetooth) connections.
ArcAir Minimum Sensor Firmware RequirementsThis article lists the minimum firmware levels for all Arc sensors to properly work with ArcAir Software.
Modbus Communication BasicsThis simple primer article discusses the basic setup of Modbus for Arc sensors and VisiFerm ECS sensors.
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