Automation ON/OFF of pumps and solenoid valves, low and high alarmindication, automatic tank filling up or draining, etc. MNR7 level controllers are suitable to non viscous, non sticky liquids withoutmagnetic and solids particles. The liquids may not crystallize or polymerized.

Switches are mounted in the guide tube; they are actuated by the magnet builtin the float, to allow 1 to 4 level detections within the application.

The housing is IP65 and the cable pass through a cable gland PG11, acc. toEx specifications. Internal wiring is done on a screw terminal.On the lower end of guide tube, a blocking ring allows to take off the floatbefore to fit the guide tube through a small diameter hole.

Please, verify the material compatibility with your chemical fluid and the limits of pressure and temperature with your process maxima, as well thecorrespondence of ATEX certificate with your requirements. - Our technicians may help you in MNR7 definition. Always mention the fluid incontact, concentration, process temperature and pressure.- Note the exact distance of contact(s) measured as of the sealing surface.Consider the minimum distance between two contacts (100 mm) and deadzone we indicate on the drawings. - The power supply of each contact of the MNR 7 Ex should be from a Zenerbarrier or certified Intrinsically Safe relay. Our RDN 11 relay is convenient to thatpurpose, see documentation 251.

Wetted parts material: Stainless steel DIN 1.4571 (AISI 316 L) - PTFE
Housing: Aluminum, IP 65 acc. EN 60 529

Process connection:
BSP 1" as a standard
Flange DN100 PN10 stainless steel 1.4571

Length: 200...3000 mm
Minimum specific weight: 750 g / L
Fluid temperature: -20…+100°C
Room temperature: -20...+60°C
Contact: 1 to 4
Minimum distance between 2 contacts: 50 mm
Contact type: bi-stable change over contacts, 60 VA

The use of a magnetic float level controller MNR 7 Ex is only for connectionto intrinsically safe control circuits in conformity with EEx ia II C or EEx ibII C specification in zone 0 category 1.

CE Mark: in accordance with low-voltage directive (73/23/ECC),EMC directive (89/336/ECC); EN 50 082-2:1995 and EN 55 011 (class A):1991.