Gas connection: M16x1mm thread
Diameter: 29mm
Height 28mm
Battery: CR2477
Housing Material: Polycarbonate and ABS
The GREENFLASH SOLID STATE O2 SENSOR features an O2 sensitive sensor spot, which incorporates a special colour dye. When this colour dye is excited with green light, it starts fluorescing and emits red light. O2 quenches the fluorescence, thus the higher the partial pressure of O2 the lower is the amplitude and lifetime of the red fluorescence signal.
The GREENFLASH SOLID STATE O2 SENSOR excites the sensors spot with a green light modulated with a sinusoidal signal. The fluorescence signal is acquired with a high speed ADC: measured. Then the GREENFLASH SOLID STATE O2 SENSOR performs a Fast Fourier Transformation to calculate amplitude and lifetime of the fluorescence, a temperature compensation, and finally calculates the pO2 based on calibration values that were obtained during the production process of the sensor.
The GREENFLASH SOLID STATE O2 SENSOR switches automatically between 3 operational modes:
▪ Sleep Mode: If the sensor is not installed, it is in Sleep Mode to conserve battery power. In this mode it measures once each 20s if it is installed in a measurement device.
▪ Standby Mode: In this mode, it performs a pilot measurement each 15s. If then the measured pO2 is greater than 0.3 bar, the sensor will enter measurement mode.
▪ Measurement Mode: In this mode, it will perform a measurement each 2 seconds and will, depending on the electrical interface, output analog or digital data. Once the pO2 falls below 0.3 for at least one hour, the sensor will exit measurement mode and return to Standby Mode.
caution
Bright light and in particular fluorescence light can interfere and cause incorrect sensor readings. Use the sensor inside the housing of a measurement system or in a light-protected environment.
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