Special equipment for PURION water disinfection plant

UV sensors and their respective monitors are necessary for surveillance of uv plants and more as a standard in modern plants. The OPD was developed for surveillance of uv-plants.
This system observe the uvc-irradiance of the used uv-lamps. The sensors we offer are printed with Carbide Photo-diodes (SiC). The used diodes have a very good sensitivity for the main wavelength between 250 nm and 260 nm. This is also the main wavelength from low-pressure lamps.
The surveillance was designed in kind of a »traffic light«. The device delivers, in combination with the uv sensor, percentage information of the uv-radiation power. The uv monitor is installed after the front side of the control box.

The operating time counter is necessary for surveillance of uv plants, and more as a standard in modern uv plants. The OTC was developed for surveillance of uv plants.
The system works as normal as an operating-hour-counter. After impression of the operating voltage (230 V AC) the counter starts running. On each switch-on the so called »startup« procedure is carried out. In doing so the LEDs red, yellow and green lights one after another each with 1 second. The procedure allows the monitoring of the functioning fo the LEDs. Moreover systematic interruption of the procedure allows resetting of the counter.
The surveillance was designed in kind of a »traffic light«. In the memory of the unit are two time-barriers (t_yellow and t_red ) to save. Is the effective time t < t_yellow, the green LED becomes illuminated. Exceed the effective time these time-barrier, the yellow LED becomes illuminated. If the effective time exceeds the second time-barrier, the red LED becomes illuminated. The uv monitor is installed after the front side of the control box.