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MM

MM
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MM

Product catalog summary
Overview
KOBOLD Messring GmbH offers level sensors and transmitters designed for continuous liquid level monitoring. These devices utilize a float principle with magnetic transmission in a 3-wire potentiometer circuit, ensuring high reliability with minimal moving parts.
Specifications
  • Measuring length: Up to 6000 mm
  • Accuracy: 0.5% for lengths of 2000 mm
  • Pressure: Maximum 30 bar
  • Temperature: Maximum 130 ºC
  • Connection: Options include G ⅜ to G 2, NPT, and flanges
  • Materials: Stainless steel, PVC, PP, PVDF
  • ATEX Certification: Ex ia, Ex d
Function Principle
The sensor operates by using a float with a magnetic system to activate reed contacts through a guide tube, forming a measuring chain that generates a voltage proportional to the liquid level. This voltage is converted to a current signal by a transmitter.
Applications
  • Wastewater and clarification plants
  • Feed and batching tanks
  • Chemical tanks
  • Manufacturing industry
  • Power plants
  • Pharmaceutical industry
  • Beverage and food industry
Design and Options
Various float designs are available, including cylindrical and ball shapes made from materials like PP, PVC-U, stainless steel, and PVDF, each with specific temperature and pressure ratings and minimum liquid density requirements.
Technical Details
  • Guide tube lengths: 300 mm to 6000 mm
  • Installation position: Vertical ± 30º
  • Cable length: 1000 mm
  • Protection: IP 65
Connection Heads
Different models of connection heads are available, with specifications for process connection, electrical connection, and temperature limits.
Notes
Specifications are subject to change without notice. Users should specify the length and type of cable in writing when ordering.
Additional Specifications
  • Process Connections: Models available with connections such as G 1½, G 2, 1½" NPT, and 2" NPT.
  • Temperature Limits: Maximum temperature is generally 90°C, reduced to 85°C with transmitter output.
  • Materials: Includes Aluminium, PVC, PVDF, and stainless steel (1.4404).
Dimensions
  • Dimensions include width across flats, electrical connection type, overall height, screwed fitting, and thread length.
  • Flange dimensions follow DIN EN 1092-1 PN16 / ANSI B 16.5 150 lbs RF standards.
Models and Features
  • Model R8, R9, N8, N9: Specific dimensions and housing materials.
  • Model D/R: Stainless steel head with touch screen LCD display and relay outputs.
  • Model C/E: Options for LCD and LED displays, suitable for ATEX applications.
Recommendations
  • Ensure float diameter is less than flange hole diameter for flanged connections.
  • Floats can be removed in all models of the MM series.
Important Notes
No responsibility is taken for errors, and specifications are subject to change without notice.
See more

Catalog excerpts

MM-1

Level Sensors reed contact chain • Measuring accuracy: • Connection: G % ... G 2, %" ... 2" NPT flange: DN 40 ... DN125, ANSI iy2" ... 4" • Material: stainless steel, PVC, PP, PVDF Connection heads: aluminium, PA, PP, ABS, stainless steel • Constant level indication regardless of conductivity, pressure and temperature • Interface level measurement (option) N2 KOBOLD companies worldwide: AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHINA, CZECHIA, EGYPT, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, RUSSIA, SPAIN, SWITZERLAND, THAILAND, TUNISIA, TURKEY, USA, VIETNAM KOBOLD Messring GmbH Nordring 22-24 D-65719 Hofheim/Ts. V* Head Office: +49(0)6192 299-0 +49(0)6192 23398 [email protected] www.kobold.com

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MM-2

Level Sensor Model MM KOBOLD level sensors/transmitters are used for continuous level indication and monitoring of all types of liquids. It is based on the float principle with magnetic transmission in a 3-wire potentiometer circuit. Its simple design with only one moving part, the float, makes the transmitter particularly reliable. A range of sensors in different materials and designs, and with different connections, are available for measured-value acquisition. Specific designs are available. A float with a magnetic system switch small reed contacts through the guide tube. The reed switches...

 Open the catalog to page 2
MM-3

Level Sensor Model MM Float designs Possible options available (in case of cable electrical connection): • Temperature switch (N/C contact) at 65° C, 80° C or 105° C (other switching outputs on request) • Interface level measurement at density difference 150 g/l No responsibility taken for errors; subject to change without prior notice.

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MM-4

Level Sensor Model MM Sealing surface Immersion depth = 20 mm Density = 1 kg/dm3 Technical Details Min. length of guide tube: Max. length of guide tube: Guide tube and screwed fitting: Min. liquid density: Max. pressure (at 20 °C): Temperature range: Max. temperature PVC cable: Max. temp. silicone cable: Max. resistance of meas. chain: ~r~r Installation position: Cable length: Protection: Connection heads: 36 0 for each 10 mm, when total length <1900 mm 10 0 for each 10 mm, when total length >1900 mm vertical ± 30° Note: Please specify the length »L« in writing. 11 Please specify in writing length...

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MM-5

Level Sensor Model MM Sealing surface Immersion depth = 23 mm Density = 1 kg/dm3 Technical Details Min. length of guide tube: 300 mm Max. length of guide tube: 2000 mm Guide tube and screwed fitting: PVC-U Max. temp. silicone cable: 60 °C Max. resistance of meas. chain: 36 0 for each 10 mm when total length <1900 mm 10 0 for each 10 mm when total length >1900 mm Installation position: vertical ± 30° Connection heads: see following pages Note: Please specify the length »L« in writing. 11 Please specify in writing length and type of cable 2 5337A for approval option »0«, 5337D (ATEX) for approval...

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MM-6

Level Sensor Model MM Sealing surface Immersion depth = 45 mm Density = 1 kg/dm3 Technical Details Min. length of guide tube: Max. length of guide tube: Guide tube and screwed fitting: Min. liquid density: Max. pressure (at 20 °C): Temperature range: Max. temperature PVC cable: Max. temp. silicone cable: Max. resistance of meas. chain: xn: Installation position: Cable length: Protection: Connection heads: 36 0 for each 10 mm, when total length <1900 mm 10 0 for each 10 mm, when total length >1900 mm vertical ± 30° Note: Please specify the length »L« in writing. 1 Please specify in writing length...

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MM-7

Level Sensor Model MM Technical Details Min. length of guide tube: Max. length of guide tube: Guide tube and screwed fitting: Min. liquid density: Max. pressure (at 20 °C): Temperature range: Max. temperature PVC cable: Max. temp. silicone cable: Max. resistance of meas. chain: Installation position: Cable length: Protection: Connection heads: 36 0 for each 10 mm when total length <1900 mm 10 0 for each 10 mm when total length >1900 mm vertical ± 30° Note: Please specify the length »L« in writing. 1) Please specify in writing length and type of cable 2) 5337A for approval options »0«and "F",...

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MM-8

Connection Heads Model MM PP screwed cover housing 11 Size of process connection must be according with float size 2) Max. temperature 85°C if transmitter output is selected 3) Length »L« includes thread length Model 3 PA screwed cover housing 1) Size of process connection must be according with float size 2) Max. temperature 85°C if transmitter output is selected 3) Length »L« includes thread length Aluminium housing 1) Size of process connection must be according with float size 2) Max. temperature 85°C if transmitter output is selected 3) Length »L« includes thread length No responsibility...

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MM-9

Connection Heads Model MM 11 Size of process connection must be according with float size 2) Length »L« includes thread length PA screwed cover housing 1) Size of process connection must be according with float size 2) Max. temperature 85°C if transmitter output is selected 3) Length »L« includes thread length Connector with connecting box 1) Size of process connection must be according with float size 2) To be chosen only with resistance output 3) Length »L« includes thread length No responsibility taken for errors; subject to change without prior notice.

 Open the catalog to page 9
MM-10

Connection Heads Model MM Flange according to DIN EN 1092-1 PN16 / ANSI B 16.5 150 lbs RF 1) Size of process connection must be according with float size 2) Length »L« includes thread length Model C/E Aluminium housing with display for applications ATEX II GD Ex d IIC 1) Only with 4 ... 20 mA transmitter. Loop powered display 2) Size of pro cess connection must be according with float size 3) Length »L« includes thread length No responsibility taken for errors; subject to change without prior notice.

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.
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