ZED UV-monitors and UV signal converters are used together with ZED UV sensors for monitoring UV lamps in systems for water/air purification and disinfection to ensure the required efficiency of disinfection:
Decreasing UV values indicate a lowered UV lamp output (e.g. at the end of lamp lifetime)
or a lowered transmission in water/air caused by pollution.
Alternating or temporarily lost UV values might be an indication of a lamp operated outside specification (e.g. lamp temperature too high). This effect might be caused by bubbles or solids in the medium also or might be an effect of electrical interferences on long cables with analog sensors.
• Differences: ZED UV monitors differ concerning form, mounting type, sensor interfaces and signal indication. UV values can be indictated via LCD or simple "traffic light" LEDs. • Basic features: UV values can be forwarded to external process units via alarm relay or a 4-20mA interface.
Hour counter and switchcycle counter enable lamp operation and lifetime monitoring. • Signal conversion: UV signal converter allow the direct evaluation of sensor signals via PLC. Converters are available for amplifying and converting plain UV silicon carbide diode (SiC) signals or digital sensor signals to analog standards.
For details please refer to the comparison below.
All monitors are designed, developed, produced and adjusted at ZED. Our product range in this field is accompanied by appropriate UV-sensors or special accessories like radiation meters for checking the UV-sensor calibration.