This analog light sensing module uses a photodiode to detect 220-280 nm light (exclusive UVC). The peak detection wavelength is 254 nm. A CMOS transimpedance amplifier is used to convert the low-level photocurrent to a stable voltage. With the input of 2.2 to 5.5 VDC the module outputs a voltage that is proportional to the UVC light on the sensing element. 2 VDC is equivalent to 40 mW/cm2. The maximum output is 5 VDC at 100 mW/cm2 UVC intensity. The output voltage is limited to the level of the input voltage.

Features: • Pure UV-C (germicidal) detection on 220-280 nm bandwidth, with rejection of UVB, UVA, and visible wavelengths • Aluminum Gallium Nitride based sensing element • Precision CMOS transimpedance amplifier offers rail-to-rail performance • Built-in noise filtering • Standard 3-pin PH connector interface • Analog voltage output proportional to UVC intensity

Applications • Sterilization lamp monitoring • Pure UV-C monitoring • Counterfeit UV product detection

Pin Configuration The module interfaces using a 3 position PH connector. The recommended connector is JST P/N PHR-3. • Pin 1: Ground (GND) • Pin 2: Voltage input (VCC) • Pin 3: Analog output (OUT)

Applications and Implementations The module is designed to interface directly to an ADC. The robust analog filtering means that software filtering is not required. After converting the ADC reading to voltage (specific to ADC resolution), the UVC optical power in mW/cm2 is found by multiplying the voltage by 20.