Guided Wave Radar Level Transmitter (TDR) • Independent of density, temperature, pressure, humidity and conductivity • Temperature range: • Output: 4 ...20 mA, switching output PNP KOBOLD companies worldwide: 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 AUSTRALIA, AUSTRIA, BELGIUM, BULGARIA, CANADA, CHINA, CZECHIA, FRANCE, GERMANY, GREAT BRITAIN, HUNGARY, INDIA, INDONESIA, ITALY, MALAYSIA, MEXICO, NETHERLANDS, PERU, POLAND, REPUBLIC OF KOREA, SPAIN, SWITZERLAND, THAILAND, TUNISIA, TURKEY, USA, VIETNAM

Guided Wave Radar Level Transmitter (TDR) Model NGM Description NGM uses TDR (Time Domain Reflectometry) technology, which is also known as Guide Microwave or Guided Wave Radar. This means that low-energy and high-frequency electromagnetic impulses, generated by the sensor’s circuitry, are propagated along the probe which is immersed in the liquid or solid to be measured. When these impulses hit the surface of the media, part of the impulse energy is reflected back up the probe to the circuitry which then calculates the level from the time difference between the impulses sent and the impulses...

Guided Wave Radar Level Transmitter (TDR) Model NGM Probe Types To meet various application requirements, NGM has three different probe types: single rod probe, wire rope probe and coaxial probe. Single rod probe is suitable for a very wide range of applications, but the signal has a wider detection radius around the rod. Thus, they are more responsive for measurement signal disturbances which can be easily overcome by observing a few mounting considerations and making simple configuration adjustments to the sensor. The single rod probe is recommended for installations in liquids and in bypass...

Technical Details Measuring principle: Installation position: Ambient temperature: Storage temperature: Max. pressure: Guided Wave Radar (GWR) Vertical ± 3 mm or 0.03 % of measured distance, whichever is greater Materials Housing: Aluminium alloy, epoxy coated, with safety chain and tin plated 1.4301/SS304 external earth screw Option: Stainless steel 1.4401/ SS316 O-ring: NGM Rod/Rope: None NGM Coaxial: FKM or EPDM NGM high temperature: NBR or FKM *Reference condition: £r= 80, water, tank 0I m, DN 200 metal flange Velocity of level change: Medium conductivity: Medium density: Process connection:...

Guided Wave Radar Level Transmitter (TDR) Model NGM Electrical data Supply voltage: Total load: Response time: Temperature drift: Switching output DC PNP (active): Load current: Signal voltage HIGH: Signal voltage LOW: Response time: Current consumption: Start-up time: Cable terminals: Cable entry: 12 ... 30 VDC (reverse-polarity protected < 50 mA), 4-wire system 4 ... 20 mA (programmable by HART® modem) < 500 Q: HART® resistor approx. 250 Q + load resistance approx. 250 Q 0.5 s [default], 2 s, 5 s (selectable) <0.2 mm/K change in ambient temperature NC [default] or NO (short-circuit protected)...

Guided Wave Radar Level Transmitter (TDR) Model NGM Electrical Connection NGM is a 4-wire system i.e. a set of 2 wires for the power supply and separate sets of 2 wires for each output. The electronic is galvanically completely insulated from its inputs/ outputs and the tank potential, thus avoiding any problems from electrochemical corrosion protection of the tank. Basic configuration of the devices can be done directly on the device via a DIP switch, a single push button and visual feedback from an LED. For greater convenience, a simple EXCEL spread sheet is provided through which remote configuration...

Guided Wave Radar Level Transmitter (TDR) Model NGM Dimensions [mm] NGM-12 ... /NGM-42 ... with thread connection Single rod / wire rope probe Standard application temperature Earth terminal Earth terminal cover locking screw 1,5 NGM-12 ... /NGM-42 ... with flange connection Single rod version Wire rope version 112 Earth terminal Earth terminal No responsibility taken for errors; subject to change without prior notice. Earth terminal cover lock COAXIAL PROBE Standard application te

NGM-22 ... with thread connection Coaxial probe Standard application temperature 112 NGM-22 ... with flange connection Earth terminal Earth terminal cover locking screw 8/10 COAXIAL PROBE COAXIAL PROBE Standard application temperature Standard application temperature NGM-19 ... with flange connection NGM-19 ... with thread connection Single rod probe, PTFE coated Flange disk Single rod probe, PTFE coated Connection thread ROD PROBE SINGLESINGLE ROD PROBE PTFE COATED PTFE COATED KFA2_DA_V11_en_1211 KFA2_DA_V11_en_1211 Flange disk Flange disk No responsibility taken for errors; SINGLE RODwithout...

Guided Wave Radar Level Transmitter (TDR) Model NGM SINGLE ROD / COAXIAL PROBE Extended application temperature NGM-8 ... /NGM-9 ... with thread connection (high temperature version) Single rod / coaxial probe Extended application temperature NGM assembled in a bypass tube option B No responsibility taken for errors; subject to change without prior notice. NBK-M bottom cover with G¼ (DIN flanges) or ¼" NPT (ASME flanges) drain plug or optional needle valve PTFE COATED Flange disk

Guided Wave Radar Level Transmitter (TDR) Model NGMNGM with "Top Mounting in Stilling Well" option S Connection NGM assembled in a bypass tube with roller/ball display (redundant measurement) option K No responsibility taken for errors; subject to change without prior notice.