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NGM Guided Radar Level Transmitter
Brand: KOBOLD Instruments, Inc
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 reflected.
The sensor can output the analyzed level as 4-20 mA Analog output, or it can convert the values into freely programmable switching output signal.
Specifications
Brand
Accuracy
- ± 3 mm
- 0.03%
Ambient Temperature Range
- -25° to 80° C (-13° to 176° F)
Applications
- Bypass Chambers
- Stilling Wells
- Storage Tanks
Approvals & Certifications
- ATEX
- CE
- Ex
- SIL
BSP Connection
- G 3/4” Male
Cable Entry
- 2 x M20 x 1.5
Current
- < 200 mA - Load Current
Electrical Rating
- < 50 mA at 24 Vdc - Current Consumption
Enclosure / Body Material
- 304L Stainless Steel
- 316L Stainless Steel
- Aluminum Alloy
- Epoxy Coated
Environmental Protection
- IP68
Flange Size - 1-1/2” (DN 40)
- 1-1/2” (DN 40) - 150# ASME
- 1-1/2” (DN 40) - PN 40
Flange Size - 2-1/2” (DN 65)
- 2-1/2” (DN 65) - 150# ASME
Flange Size - 2” (DN 50)
- 2” (DN 50) - 150# ASME
- 2” (DN 50) - PN 40
Flange Size - 3” (DN 80)
- 3” (DN 80) - ASME B16.5 Class 150
- 3” (DN 80) - PN 40 B1
Flange Size - 4” (DN 100)
- 4” (DN 100) - ASME B16.5 Class 150
- 4” (DN 100) - PN 16 B1
Gasket Material
- Klinger SIL C-4400
Length
- Maximum
Load
- < 500 ohms - HART Resistor
- 250 ohms
Materials of Construction
- 316 Stainless Steel
- 316L Stainless Steel
- 316Ti Stainless Steel
- 321 Stainless Steel
- PEEK
- PTFE
Maximum System Pressure
- psi: 580.2 (kPa: 4,000, bar: 40)
Media
- Liquids
- Solids
Mounting Position
- Vertical
NPT Connection
- 3/4” NPT Male
O-Ring Material
- Ethylene Propylene (EPR)
- FKM
- NBR
Output
- 4-20 mA
Output Function
- Normally Closed
- Normally Open
Pressure Range
- bar: -1 to 40
- kPa: -100 to 4,000
- psi: -14.5 to 580
Process Temperature
- -40° to 150° C (-40° to 302° F)
Repeatability
- < 0.079” (< 2 mm)
Resolution
- 0.04” (1 mm)
Response Time
- 0.5 second
Sensor / Probe Diameter
- 0.15” (4 mm) - Wire Rope
- 0.23” (6 mm) - Single Rod
- 0.67” (17.2 mm) - Coaxial
Sensor / Probe Length
- 3.94” to 787.4” (100 to 20,000 mm)
Storage Temperature
- -40° to 85° C (-40° to 185° F)
Supply Voltage
- 0 to 2 V - Low to High Signal Voltage
- 12-30 Vdc
Switch Type
- PNP
Temperature Range
- -200° to 250° C (-328° to 482° F)
Thermal Drift
- < 0.2 mm/K
Update Time
- < 6 seconds