Signal amplifierVNR 21.22

conditioning electronic adjustable

ELECTRA – VNR 21.22 – Signal input from conductive probe – One channel (type 21) or Two channel (type 22) – Supply 24/220 Vac, 110 Vac on request – Output alarm relays, SPDT contacts – Alarm LED indication – 10-250 uS or 1-10 uS adjustable sensitivity – DIN mounting rail 35 mm. – Protection class IP40 The VNR21.22 control units are designed as interface for conductive level probes SL sériés. These electronic units are used to control liquids that hâve a minimum electrical conductivity of 1 The System is based on measurement of the conductivity of the liquid to be controlled and works with low potential and with altemating currents, in order to avoid the incrustation of the électrodes and / or perforation of the tank normally caused by the use of direct currents, which cause a galvanic action on materials. The contact of the electrode with the liquid under control détermines the actuation of a relay inside the control unit and it is possible to drive any alarm System and / or actuator. By using multiple probes and multiple control units, appropriately connected, a System of dosage and safety can be realized. • - One channel (2100) or two channels (2200) design. • - Adjustable sensitivity from lgS. • - Relay output. • - Alarm led. • - DIN rail mounting.