Transmitter for oxygen sensors
Application
• Sewage treatment plants
• Wastewater treatment
• Water treatment
• Drinking water
• Surface water: rivers, lakes, sea
• Fish farming
• Boiler feed water (trace measurement)
Your benefits
• Field or panel-mounted housing
• Universal application
• For analogue and digital sensors
• Simple handling
– Logically arranged menu structure
– Simple single-point calibration in air, air-saturated water or in the medium is
possible
• Safe operation
– Excellent interference immunity
– Manual contact control and user-defined alarm configuration
The basic unit can be extended with:
• 2 or 4 additional contacts for use as:
– Limit contacts (also for temperature)
– P(ID) controller
– Timer for simple rinse processes
– Complete cleaning with Chemoclean
• Plus package:
– User-defined current output characteristics
– Automatic cleaning trigger on alarm or limit violation
– Process monitoring
– Sensor live check
• HART or PROFIBUS-PA/-DP
• 2nd current output for temperature, main measured value or actuating variable
• Current input for flow rate monitoring with controller shut off or for feedforward

control

Measuring system A complete measuring system comprises:
Variant 1 (DX/DS with COS41)
• The transmitter Liquisys M COM223 or COM253 in version DX or DS
• An oxygen sensor COS41
• An immersion, flow or retractable assembly
Options: extension cable CMK, junction box VBM
Variant 2 (WX/WS with COS31, COS61 or COS71)
• The transmitter Liquisys M COM223 or COM253 in version WX or WS
• An oxygen sensor COS31, COS61 or COS71
• An immersion, flow or retractable assembly
Options: extension cable OMK, junction box VS