OVK-detector - alarm for cleaning
The OVK Duct Detector can detect dirt and dust
with an automatic cleansing alarm in the difficult environment
that exists in a ventilation duct.
The OVK is an optical obscurity detector that
works inside the ventilation duct.
The sensor component largely covers the whole
A light beam is emitted from a transmitter to a
receiver. If dirt gets into the duct the light beam is obscured and an
alarm is activated.
Since the pollution often occurs very slowly in
relation to the obscurity, dirt is measured every two hours.
The pollution measures the received light input
and compares it with the value two hours back.
If the received power has decreased the detector
automatically raises the outgoing light output so much that the received
power always remains at alert level.
The outgoing light output can be increased
continuously and during the whole compensation process the detector’s
contamination-degree can be monitored.
When the dirt level has reached step 7V, the
service alarm is activated (detector is cleaned) for control measures
of ventilation ducts and at 9.5 V a cleansing alarm is activated.
Then, the detector and the ventilation system must be cleaned.
The OVK-detector can be cleaned by the regular
operating staff without much prior knowledge of the system.
The OVK-detector is designed to be connected to
all alarm-, control- and regulation systems on the market, both digital